九州大学 研究者情報
論文一覧
米津 幸太郎(よねづ こうたろう) データ更新日:2020.06.29

准教授 /  工学研究院 地球資源システム工学部門 地球工学


原著論文
1. Saefudin Juhri, Kotaro Yonezu, Takushi Yokoyama, Agung Harijoko, Muhammad Istiawan Nurpratama , Study on Silica Scaling at Open Canal System, Dieng Geothermal Power Plant, Indonesia , Proceedings of World Geothermal Congress 2020, 2020.04.
2. Sachi Kawamoto Masunaga, Yuki Tasaka, Hitoshi Inoue, Kotaro Yonezu, Yumi Kiyota, Koichiro Watanabe and Takushi Yokoyama, Chemical State of Aluminum in Geothermal Water, Proceedings of World Geothermal Congress 2020, 2020.04.
3. Seang Sirisokha, Kotaro Yonezu, Thomas Tindell, Tetsuya Nakanishi, Koichiro Watanabe, Jocelyn Pelletier, Lithogeochemistry of Intrusive Rocks in the Halo Porphyry Copper-Molybdenum Prospect, Northeast Cambodia, Open Journal of Geology, 10.4236/ojg.2019.97023, 9, 7, 342-363, 2019.07.
4. Jerali D. Rodrigo, Jillian Aira S. Gabo‐Ratio, Karlo L. Queaño, Allan Gil S. Fernando, Leopoldo P. de Silva Jr, Kotaro Yonezu, Yu Zhang, Geochemistry of the Late Cretaceous Pandan Formation in Cebu Island, Central Philippines: Sediment contributions from the Australian plate margin during the Mesozoic, The Deposition Record, https://doi.org/10.1002/dep2.103, 6, 2, 309-330, 2020.01.
5. Kyaw Min Khaing, Kotaro Yonezu, Thomas Tindell, Koichiro Watanabe and May Thwe Aye, Vein Mineralogy and Hydrothermal Gold Mineralization at the Kyaw Soe Thu Prospect in the Wabo Deposit, Mandalay Region, Central Myanmar, Open Journal of Geology, 10.4236/ojg.2020.102008, 10, 2, 137-154, 2020.02.
6. Tomy Alvin Rivai, Syafrizal, Kotaro Yonezu, Thomas Tindell, Adrian J. Boyce, Kenzo Sanematsu, Shota Satori, Koichiro Watanabe, The Dairi SEDEX Zn + Pb + Ag deposit (North Sumatra, Indonesia)
Insights from mineralogy and sulfur isotope systematics, Ore Geology Reviews, 10.1016/j.oregeorev.2020.103510, 122, 2020.07, [URL], The Dairi Zn + Pb + Ag deposit is the only giant SEDEX deposit that has been discovered to date in Sumatra. Ore-gangue mineralogy and sulfur isotope studies have been carried out to elucidate the paragenetic sequence, deformation of ore, flow direction of ore forming fluid, and sources of sulfur in the Dairi deposit. Stratiform orebodies hosted by the Julu unit (interbedded dolomitic siltstone and carbonaceous shale; multilayers; accounting for greater than 90% of metal resources) consist of pyrite-rich massive, sphalerite-rich massive, bedded sulfide, galena-rich breccias, and vein ore types, whereas discordant orebodies hosted by the Jehe unit (massive and brecciated arenaceous dolostone) comprise vein and disseminated ore types. Fine-grained, subhedral-euhedral and framboidal pyrite (enriched in Co, Ni, Cu, As, Bi, Ag relative to hydrothermal pyrite) were precipitated in the diagenetic stage, followed by precipitation of pyrite (enriched in Zn, Pb, Mn, Tl relative to diagenetic pyrite), sphalerite, galena, chalcopyrite, pyrrhotite, acanthite, tetrahedrite, tennantite, pyrargyrite, boulangerite, freieslebenite, and diaphorite in the hydrothermal stage derived from the exhaled ore-forming fluid. Metamorphic pyrite (enriched in Co and depleted in Cu, Zn, Mn, Tl, Ag relative to the other pyrites) formed from pyrrhotite (depleted in Co relative to metamorphic pyrite) and soft sulfides were remobilized into pyrite fractures and veins during sub-greenschist metamorphism. Ore-forming fluid ascended through fractures in the Jehe unit (forming the discontinuous orebodies) and then it discharged and flowed from SE to NW on the seafloor (forming the stratiform orebodies). Reduced sulfur for diagenetic pyrite (δ34S = -4.1‰ to + 11.6‰) was supplied by bacteriogenic reduction of Carboniferous seawater sulfate. Hydrothermal sulfur was considered as the source of sulfur for the Jehe-hosted orebodies (δ34S = +3.5‰ to + 8.0‰). The heavier δ34S of sulfides in the Julu-hosted orebodies (δ34S = +6.4‰ to + 28.8‰) suggests large-scale bacteriogenic reduction of Carboniferous seawater sulfate in a restricted, anoxic basin. A bacteriogenic reduced sulfur reservoir, rather than hydrothermal sulfur, may be more plausible to account for the scale of the giant Dairi deposit..
7. Ryota Kokubu, Akira Imai, Kotaro Yonezu and Thomas Tindell, Physicochemical Condition of Gold Mineralization in the Masara Mine, Southeastern Mindanao, Philippines, Proceedings of International Symposium on Earth Science and Technology 2019, 542-545, 2019.12.
8. Myo Kyaw Hlaing, Kotaro Yonezu, May Thwe Aye, Day Wa Aung and Koichiro Watanabe, Geology and Fluid Inclusion Studies on the Shwetagun Gold Mineralization at Yamethin Township, Mandalay Region, Central Myanmar, Proceedings of International Symposium on Earth Science and Technology 2019, 537-541, 2019.12.
9. Sachi Masunaga, Kotaro Yonezu, Koichiro Watanabbe and Takushi Yokoyama, Aluminum Species in Acidic and Neutral pH Geothermal Water, Proceedings of International Symposium on Earth Science and Technology 2019, 520-524, 2019.12.
10. Takaaki Chuuman, Kinnosuke Eguchi, Marina Akinaga, Daisuke Kawamoto, Kotaro Yonezu, Koichiro Watanabbe and Takushi Yokoyama, Polymerization State of Silicic Acid Adsorbed on Anion Exchange Resin 29Si MAS NMR Relaxation Time, Proceedings of International Symposium on Earth Science and Technology 2019, 455-457, 2019.12.
11. Naoto Kugizaki, Kotaro Yonezu, Akira Imai, Jillian Aira S. Gabo-Ratio and Eric S. Andal, Characteristic of Gold Mineralization of the Santoy Vein, Sangilo Mine, Baguio Mineral District, Philippines, Proceedings of International Symposium on Earth Science and Technology 2019, 197-200, 2019.12.
12. Sai Pyae Sone, Kotaro Yonezu, Akira Imai, Koichiro Watanabe and Kenzo Sanematsu, Mineralogy and Geochemistry of Tagun-Khin-Dan Gold Mineralization Area in Slate Belt of Central Myanmar, Proceedings of International Symposium on Earth Science and Technology 2019, 72-77, 2019.12.
13. Htet Sandar Aung, Kotaro Yonezu, Akira Imai, Thomas Tindell, Koichiro Watanabe and May Thwe Aye, Mineralization and Fluid Inclusion Microthermometry in EE3 Gold Prospect, Sagaing Region, Northern Myanmar, Proceedings of International Symposium on Earth Science and Technology 2019, 67-71, 2019.12.
14. Bilegsaikhan Bolor-Erdene, Kotaro Yonezu, Akira Imai, Thomas Tindell and Jargalan Sereenen, Geochemistry, Mineralization and Fluid Inclusion Study of The Bayan-Uul Porphyry Cu-Au-Mo Deposit, Central Mongolia, Proceedings of International Symposium on Earth Science and Technology 2019, 63-66, 2019.12.
15. Yuuki Tada, Kotaro Yonezu, Thomas Tindell, Shu-hei Totsuka, Akira Miyamoto, Jun-Ichiro Ishibashi, Junichi Miyazaki, Ryo Okumura, Yuto Iinuma and Koichi Takamiya, Mineralogical Study of Chimney and Mound Sulfide Ore at the Gondo Hydrothermal Field in the Okinawa Trough, Proceedings of International Symposium on Earth Science and Technology 2019, 59-62, 2019.12.
16. Tomiyuki Yamada, Kotaro Yonezu, Jillian Aira S. Gabo-Ration, R. A. Santos, Marc Raymund L. Zamora, Relation between Concentration of Sc and Ni and Bedrock in Ni Laterite Deposit, Berong in Palawan Island, Philippines, Proceedings of International Symposium on Earth Science and Technology 2019, 55-58, 2019.12.
17. Hiroki Kinoshita, Kyaw Thu Htun, Kotaro Yonezu and Akira Imai, Petrography and Mineralogy of Tin Pegmatite Deposit in the Yamon-kazat Area, Southern Myanmar, Proceedings of International Symposium on Earth Science and Technology 2019, 51-54, 2019.12.
18. Yushi Sekiya, Nobuhiro Mukae, Kotaro Yonezu, Thomas Tindell, Jun-Ichiro Ishibashi, Tatsuo Nozaki and Akira Imai, Characteristics of Ore-forming Fluids at the Hakurei Site, Izena Hole, Middle Okinawa Trough, Proceedings of International Symposium on Earth Science and Technology 2019, 47-50, 2019.12.
19. Jacob Kaavera, Akira Imai, Kotaro Yonezu, Thomas Tindell, Kenzo Sanematsu and Koichiro Watanabe, Mineralogy and Mineral Associations of Platinum Group Elements in the Ultramafic Cumulates of Molopo Farms Complex at the Tubane Area, Southern Botswana, Proceedings of International Symposium on Earth Science and Technology 2019, 42-46, 2019.12.
20. Hidaya Hassan, Kotaro Yonezu, Akira Imai, Thomas Tindell and Koichiro Watanabe, Geochemistry and Origin of the Host Rocks of Mbesa Cu-Ni-PGE Prospect, Southern Tanzania, Proceedings of International Symposium on Earth Science and Technology 2019, 36-41, 2019.12.
21. @Kotaro Yonezu, Hitoshi Inoue, Sachi K. Masunaga, Yumi Kiyota, Koichiro Watanabe and Takushi Yokoyama, TWO VIEWPOINTS FOR REMOVAL OF SILICIC ACID FROM GEOTHERMAL WATER TO PREVENT SILICA SCALING, Proceedings of 41st New Zealand Geothermal Workshop, 29, 2019.11.
22. Mohamed Abdillahi Aden, Akira Imai, Kotaro Yonezu, Thomas Tindell, Koichiro Watanabe, SUBSURFACE ALTERATION AND 3D MODELLING IN ASAL-RIFT GEOTHERMAL FIELD, DJIBOUTI., Proceedings of 41st New Zealand Geothermal Workshop, 46, 2019.11.
23. Mizuki Fujisaki, Sachihiro Taguchi, Hitoshi Chiba, Yi-Chia Lu, Shen-Rong Song, Koichiro Watanabe, Kotaro Yonezu, THE CHARACTERISTICS OF HYDROTHERMAL ALTERATION AT STEAMING GROUND IN THE NORTHEASTERN PART OF TATUN VOLCANO GROUP, TAIWAN, Proceedings of 41st New Zealand Geothermal Workshop, 48, 2019.11.
24. Yuji Gonoi, Akira Imai, Kotaro Yonezu, Thomas Tindell, Koichiro Watanabe , NEW IMPLICATION OF WALL ROCK ALTERATION MINERALOGY IN THE HISHIKARI EPITHERMAL GOLD DEPOSIT, JAPAN, Proceedings of 41st New Zealand Geothermal Workshop, 78, 2019.11.
25. Saefudin Juhri, Kotaro Yonezu, Takushi Yokoyama, M Istiawan Nurpratama, Agung Harijoko, FORMATION MECHANISM OF SILICA SCALE IN DIENG GEOTHERMAL POWER PLANT, INDONESIA
, Proceedings of 41st New Zealand Geothermal Workshop, 82, 2019.11.
26. Kyaw Thu Htun, Kotaro Yonezu, Aung Zaw Myint, Thomas Tindell, Koichiro Watanabe, Petrogenesis, ore mineralogy, and fluid inclusion studies of the tagu Sn–W deposit, myeik, southern Myanmar, Minerals, 10.3390/min9110654, 9, 11, 2019.11, [URL], Most of the granite-related Sn–W deposits in Myanmar are located in the Western Granitoid Province (WGP) of Southeast Asia. The Tagu deposit in the southern part of the WGP is a granite related Sn–W deposit. The biotite granite is composed of quartz, feldspars (plagioclase, orthoclase, and microcline), and micas (muscovite and biotite) and belongs to S-type peraluminous granite. Abundances of large-ion lithophile elements (LILEs), such as Rb, K, and Pb, coupled with the deficiency of high-field-strength elements (HFSEs), such as Nb, P, and Ti, indicate that the parental magma for the Tagu granite was derived from the lower continental crust at syn-collisional setting. Mineralized veins consist of early-formed oxide ore minerals, such as cassiterite and wolframite, which were followed by the formation of sulfide minerals. Three main types of fluid inclusions were distinguished from the mineralized quartz veins hosted by granite and metasedimentary rocks: Type-A—two phases, liquid (L) + vapor (V) aqueous inclusions; Type-B—two phases, vapor (V) + liquid (L) vapor-rich inclusions; And type-C—three phases, liquid + CO2-liquid + CO2-vapor inclusions. Quartz in the veins hosted in granite corresponding with earlier deposition contains type-A, type-B, and type-C fluid inclusions, whereas that in the veins hosted in metasedimentary rocks corresponding with later deposition contains only type-A fluid inclusions. The homogenization temperatures of type-A inclusions range from 140 °C to 330 °C (mode at 230 °C), with corresponding salinities from 1.1 wt.% to 8.9 wt.% NaCl equivalent for quartz veins hosted in metasedimentary rocks, and from 230 °C to 370 °C (mode at 280 °C), with corresponding salinities from 2.9 wt.% to 10.6 wt.% NaCl equivalents for quartz veins hosted in granite. The homogenization temperatures of type-B vapor-rich inclusions in quartz veins in granite range from 310 °C to 390 °C (mode at 350 °C), with corresponding salinities from 6.7 wt.% to 12.2 wt.% NaCl equivalent. The homogenization temperatures of type-C H2O–CO2–NaCl inclusions vary from 270 °C to 405 °C (mode at 330 °C), with corresponding salinities from 1.8 wt.% to 5.6 wt.% NaCl equivalent. The original ascending ore fluid was probably CO2-bearing fluid which evolved into two phase fluid by immiscibility due to pressure drop in the mineralization channels. Furthermore, the temperature and salinities of two-phase aqueous fluids were later most likely decreased by the mixing with meteoric water. The salinities of the type-B vapor-rich inclusions are higher than those of the type-C CO2-rich inclusions, which may have resulted from CO2 separation from the fluids. The escape of gases can lead to an increase in the salinity of the residual fluids. Therefore, the main ore-forming mechanisms of the Tagu Sn–W deposit are characterized by fluid immiscibility during an early stage, and fluid mixing with meteoric water in the late stage at a lower temperature..
27. Kawamoto D, Yamanishi Y, Ohashi H, Yonezu K, Honma T, Sugiyama T, Kobayashi Y, Okaue Y, Miyazaki A, Yokoyama T, A new and practical Se(IV) removal method using Fe3+ type cation exchange resin, Journal of Hazardous Materials, 378, 2019.10.
28. Tomy Alvin Rivai, Kotaro Yonezu, Syafrizal, Kenzo Sanematsu, Damar Kusumanto, Akira Imai, Koichiro Watanabe, A Low-Sulfidation Epithermal Mineralization in the River Reef Zone, the Poboya Prospect, Central Sulawesi, Indonesia
Vein Textures, Ore Mineralogy, and Fluid Inclusions, Resource Geology, 10.1111/rge.12206, 69, 4, 385-401, 2019.10, [URL], The Poboya Prospect lies along the North Northwest - South Southeast Palu-Koro Fault Zone in the central part of the West Sulawesi Arc. The geology of the area consists of the Palu Metamorphic Complex overlain by the Paleogene-Neogene Tinombo Formation of volcanosedimentary rocks, the Celebes Molasse sediment, and Late Cenozoic granitic rocks. Petrography, scanning electron microscope with energy-dispersive spectrometry (SEM-EDS), electron probe microanalyzer (EPMA), and fluid inclusion microthermometry were carried out to examine vein textures, ore mineralogy, and characteristics of the ore-forming fluid responsible for mineralization in the River Reef Zone, the Poboya Prospect. Textures of quartz-carbonate veins in the River Reef Zone include massive micro-comb, moss, colloform, crustiform, mosaic, feathery, flamboyant, lattice bladed, ghost bladed, parallel bladed, and saccharoidal textures representing primary growth, recrystallization, and replacement. The homogenization temperature and fluid salinity are 240–250°C and 0.3–0.7 wt% NaCl eq., respectively. Ore minerals precipitated in the early stage consist of electrum, naumannite-aguilarite, chalcopyrite, pyrite, marcasite, sphalerite, and pyrrhotite. Apart from pyrrhotite, these ore minerals were also precipitated in the late stage along with selenopolybasite, freibergite, argyrodite, pyrargyrite, and galena. Selenium more preferably occurs as the crystallographic replacement of sulfur in naumannite-aguilarite, argyrodite, pyrargyrite, selenopolybasite, and freibergite instead of as independent selenide minerals. The low-sulfidation epithermal deposit in the River Reef Zone, the Poboya Prospect, illustrates the potential of the West Sulawesi Arc, particularly along the Palu-Koro Fault Zone, to host epithermal gold mineralization..
29. Daisuke Kawamoto, Yui Yamanishi, Hironori Ohashi, Kotaro Yonezu, Tetsuo Honma, Takeharu Sugiyama, Yasuhiro Kobayashi, Yoshihiro Okaue, Akane Miyazaki, Takushi Yokoyama, A new and practical Se(IV) removal method using Fe3+ type cation exchange resin, Journal of Hazardous Materials, 10.1016/j.jhazmat.2019.04.076, 378, 2019.10, [URL], An effective method for removing selenium (Se) from water is required from the viewpoint of environmental preservation. To establish this method, a cation exchange resin that adsorbed ferric ions was applied as an adsorbent. In this study, the adsorption behavior of Se to the adsorbent was examined by both batch and column methods. The batch experiment confirmed that selenite ions (Se(IV)) are effectively adsorbed but selenate ions (Se(VI)) are hardly adsorbed. To elucidate the adsorption mechanism, the Fe in the adsorbent and the Fe in the adsorbent after the adsorption of Se(IV) were characterized by Fe K-edge X-ray absorption spectroscopy and 57Fe Mӧssbauer spectroscopy. The analytical result of Se K-edge EXAFS spectra for the Se(IV) adsorbed on the adsorbent suggests that Se(IV) are adsorbed specifically to the adsorbent through the formation of Fe-O-Se bonds. The breakthrough curve obtained by the column experiment showed that Se(IV) in 3 tons of synthetic solution containing 0.1 ppm Se can be efficiently removed using a column in which 12.8 g (10.4 cm3) of the adsorbent was packed..
30. M. Cherbal, Kotaro Yonezu, D. E. Aissa, T. Tindell, Koichiro Watanabe, Metacarbonatite rocks from Amesmessa area (In Ouzzal Terrane), Hoggar shield, Algeria, Journal of African Earth Sciences, 10.1016/j.jafrearsci.2018.12.013, 153, 268-277, 2019.05, [URL], The Hoggar Shield (South Algeria) belongs to the 3,000 km-long Pan-African Trans-Saharan Belt which formed in the Neoproterozoic and Cambrian, between 750 and 545 Ma. At the western part of this shield, carbonate rocks crop out to the north and south of Amesmessa gold deposit. They occur as lensoid bodies and dikes cross-cutting Archean granulitic rocks, and are consistently associated with mafic rocks and syenite. The petrogenesis of the Amesmessa metacarbonate rocks, which have previously been interpreted as marbles of Archean age, are reconsidered in the present study. Within the Amesmessa area, a small volume of carbonate rocks consisting of calcite, biotite, clinopyroxene, hornblende, olivine and apatite, and are spatially associated with ultramafic rocks, are surrounded by granosyenite, pyroxenite and rhyolite. The cross-cutting relationship and other outcrop features of the area indicate that the carbonate rocks are an intrusive phase and younger than the other surrounding Archean rocks. The average total REE concentration in the metacarbonate is up to 5,700 ppm. However the associated rocks; syenite and pyroxenite contain only 60 and 12 ppm, respectively. Sr concentration is also high (>1,390 ppm) which is normally high in carbonatitic rocks and low in limestones. On the basis of available chemical analyses and outcrop evidence, it becomes clear that the Amesmessa carbonate rocks consist of metamorphosed carbonatite..
31. @Myo Min Tun, @I Wayan Warmada, @Arifudin Idrus, @Agung Harijoko, @Kotaro Yonezu, @Koichiro Watanabe, Geochemical Behavior of Trace- and Rare-Earth Elements in the Hydrothermal Alteration Facies of the Cijulang Area, West Java, Indonesia, Open Journal of Geology, 9, 5, 278-294, 2019.05.
32. Tomy Alvin Rivai, Kotaro Yonezu, Syafrizal, Koichiro Watanabe, Mineralogy and geochemistry of host rocks and orebodies at the anjing hitam prospect (Dairi, north sumatra, indonesia) and their environmental implications, Evergreen, 10.5109/2320997, 6, 1, 18-28, 2019.03, [URL], The Anjing Hitam prospect hosts Zn-Pb orebodies that may trigger environmental issues during its future mining and smelting activities. Therefore, the understanding of mineralogical and geochemical characteristics of host rocks and orebodies in this prospect is important to reveal. Concentration of sulfur in the host rocks is controlled by pyrite. Pyrite and sphalerite control concentration of sulfur in pyrite-rich massive ore while sphalerite and galena control concentration of sulfur in sphalerite-rich massive ore. Concentrations of cadmium and arsenic are strongly controlled by sphalerite and galena, respectively. Future mining and smelting activities at the Anjing Hitam prospect may give rise to several environmental issues, such as acid mine drainage, soil acidification and degradation, trace element contamination and human health problems..
33. Nyein N. Sint, Kotaro Yonezu, Thomas Tindell, May T. Aye, Htay Win, Akira Imai, Koichiro Watanabe, Geology and Skarn Cu–Bi–Au Mineralization at Shwe Min Bon Area, Kalaw Township, Southern Shan State, Myanmar, Resource Geology, 10.1111/rge.12187, 69, 1, 85-106, 2019.01, [URL], The Shwe Min Bon Cu–Au skarn deposit lies within one of the largest Au–Cu belts in Myanmar. The deposit is situated along the Shan scarp zone, which marks the boundary between the Myanmar central basin to the west and the Shan plateau to the east. The Shwe Min Bon deposit comprises skarn-type metasomatic alteration, and the Cu–Au mineralization occurs along the contact face between the Nwabangyi Dolomite and Shweminbon Formation and the Cretaceous dioritic rocks. The metasomatic process resulted in pro- and retrograde mineral assemblages in exoskarn. Hydrothermal activities in the Shwe Min Bon deposit are classified into prograde, retrograde stage I, and retrograde stage II. The prograde skarn is classified into a proximal garnet skarn with minor clinopyroxene and a distal wollastonite skarn. Chlorite, epidote, and tremolite–actinolite were formed during the retrograde stage I. Cu–Au mineralization mainly occurred in retrograde stage I, which was characterized by moderate temperatures (260–320 °C) and fluid with a moderate salinity (5.0–6.0% NaCl equiv.). Low temperature (180–200 °C) and low salinity (2.0–3.0% NaCl equiv.) were responsible for retrograde stage II. Au mineralization is mainly associated with chalcopyrite and tennantite in retrograde stage I and with tellurobismuthite in retrograde stage II..
34. Ryo Tamura, Hitoshi Inoue, Eri Hanajima, Risa Ikeda, Yuji Osaka, Takumi Yanaze, Minoru Kusakabe, Kotaro Yonezu, Takushi Yokoyama, Katsuo Tsukamoto, Katsumi Marumo, Akira Ueda, In situ observations of silica nanoparticle growth in geothermal brine at the Sumikawa geothermal station, Japan, by dynamic light scattering, Geothermics, 10.1016/j.geothermics.2018.10.008, 77, 304-312, 2019.01, [URL], Silica nanoparticle growth in geothermal brine was examined during the polymerization of silicic acid by observation with dynamic light scattering (DLS) at the Sumikawa geothermal station, examining raw (pH 6.6), pH adjusted (pH 8), and diluted brines (100 to 60%). The monosilicic acid concentration rapidly decreased over time in the raw brine but was almost constant in the samples with lower silicic acid concentrations. The average polysilicic acid particle diameter in the raw brine rapidly increased, from 1 to 6 nm, within 5 min (stage I) and then was almost constant at 7 nm for the subsequent 30 min (stage II)..
35. Takaaki Chuuman, Kinnosuke Eguchi, Marina Akinaga, Daisuke Kawamoto, Shigeki Horii, Kotaro Yonezu, Koichiro Watanabe, Takushi Yokoyama, Inhibition of silicic acid elution during the regeneration of strong base anion exchange resin column, Bulletin of the Chemical Society of Japan, 10.1246/bcsj.20180265, 92, 4, 869-874, 2019.01, [URL], To determine why silicic acid elution is often incomplete during regeneration of strong base anion exchange resin columns, an OH
-
type anion exchange resin (OH
-
type resin) adsorbing silicic acid was prepared and the desorption (elution) behavior of silicic acid adsorbed to the resin was examined by batch and column experiments. It was first found that silicic acid adsorbed to an OH
-
type resin polymerizes to form polysilicic acids (Q
1
, Q
2
and Q
3
structures) even when a smaller amount of silicic acid than the ion exchange capacity was adsorbed (unsaturated adsorption). Consequently, elution of silicic acid from the OH
-
type resin column is most likely caused by hydrolytic decomposition of polysilicic acid. Silicic acids with Q
0
, Q
1
and Q
2
structures can be easily desorbed from the OH
-
type resin by immersing them in a 1% NaOH solution for 5min. On the other hand, silicic acid with the Q
3
structure is barely desorbed. In this study, incomplete elution of silicic acid from OH
-
type resin columns has been found to be caused by polymerization of adsorbed silicic acid and the elution behavior may depend on the polymerization mode..
36. Hitoshi Inoue, Kotaro Yonezu, Koichiro Watanabe and Takushi Yokoyama, Removal of Slilicic Acid and Aluminum from Geothermal Water by Adding Calcium Ion, International Symposium on Earth Science and Technology 2018, 23-26, 2018.12.
37. Mohamed Abdillahi Aden, Koichiro Watanabe, Akira Imai, Kotaro Yonezu and Thomas Tindell, Sub-surface Geology of Hydrothermal Alteration and 3D Modelling of the Wells GLC-1, ASAL-3, 4 and 5 in Asal Rift Geothermal, Djibouti, International Symposium on Earth Science and Technology 2018, 33-37, 2018.12.
38. Seang Sirisokha, Tetsuya Nakanishi, Akira Imai, Kotaro Yonezu, Thomas Tindell and Koichiro Watanabe, Hydrothermal Alteration, Mineralization and Fluid Inclusion of the Halo Porphyry Copper-Molybdenum Deposit, Northeastern Cambodia, International Symposium on Earth Science and Technology 2018, 54-60, 2018.12.
39. Yuuki Tada, Kotaro Yonezu, Thomas Tindell, Koichiro Watanabe, Jun-Ichiro Ishibashi, Junichi Miyazaki and Ikuro Mizukoshi, Mineral Composition and Assemblage of Chimney Ore at Yokosuka and Gondo Hydrothermal Sites in Okinawa Trough, International Symposium on Earth Science and Technology 2018, 60-63, 2018.12.
40. Kyaw Thu Htun, Kotaro Yonezu, Aung Zaw Myint, Akira Imai, Thomas Tindell and Koichiro Watanabe, Geology, Mineralization, and Fluid Inclusion Characteristics of Sn-W Deposit of the Tagu Area, Myeik, Southern Myanmar, International Symposium on Earth Science and Technology 2018, 64-69, 2018.12.
41. Shota Nakao, Kotaro Yonezu, Thomas Tindell, Mega Fatimah Rosana and Benny Bensaman, Characteristics of Ore-forming Fluid and Mineralization Styles of the DMLZ Skarn Deposit, Ertsberg Mining District, Papua, Indonesia, International Symposium on Earth Science and Technology 2018, 70-75, 2018.12.
42. Jacob Kaavera, Akira Imai, Kotaro Yonezu, Thomas Tindell and Koichiro Watanabe, Petrology and Mineralization from the Tubane Area, Northern Lobe of Malopo Farms Complex Layered Intrusion Botswana, International Symposium on Earth Science and Technology 2018, 76-81, 2018.12.
43. Shota Inoue, Kotaro Yonezu, Hironori Ohashi and Takushi Yokoyama, Evaluation of Silica Glass Containing Rare Earth Elements as Reference Material: Determination for Geochemical Samples by LAICPMS, International Symposium on Earth Science and Technology 2018, 82-85, 2018.12.
44. Tomiyuki Yamada, Kotaro Yonezu, Jillian A. S. Gabo-Ratio, R. A. Santos, Amilo C. Milaor, and Angilhiza M. Francisco, Geochemical Association between Sc Concentration Mechanism and Bedrock in Nickel Laterite Deposit, Central Dinagat Island, Philippines, International Symposium on Earth Science and Technology 2018, 86-90, 2018.12.
45. Hiroki Kinoshita, Kyaw Thu Htun, Kotaro Yonezu and Akira Imai, Geochemical and Mineralogical Research of Tin Pegmatite in Yamon-Kasat Area, Southern Part of Myanmar, International Symposium on Earth Science and Technology 2018, 91-94, 2018.12.
46. Shinji Kawaguchi, Kotaro Yonezu, Thomas Tindell, Jun-Ichiro Ishibashi, Tatsuo Nozaki, Yoko Ohtomo, Tsubasa Otake and Koichiro Watanabe, Precipitation Condition of Silver Bearing Minerals during the Formation of Chimney at the Bayonnaise Knoll, Izu-Bonin Arc, International Symposium on Earth Science and Technology 2018, 95-98, 2018.12.
47. Naoto Kugizaki, Kotaro Yonezu, Akira Imai, Jillian A. S. Gabo-Ratio, Eric S. Andal and Adrian Boyce, Physicochemical Condition of Epithermal Gold Mineralization of the Sesame Vein, Sangilo Mine, Baguio Mineral District, Philippines, International Symposium on Earth Science and Technology 2018, 99-102, 2018.12.
48. Onchanok Juntarasakul, Kotaro Yonezu, Takushi Yokoyama and Koichiro Watanabe, Adsorption Mechanism of Phosphate Ions by Ferric Iron Decorated Cation Exchange Resin, International Symposium on Earth Science and Technology 2018, 103-105, 2018.12.
49. Tomy Alvin Rivai, Syafrizal, Kotaro Yonezu, Thomas Tindell, Akira Imai and Koichiro Watanabe, Descriptive and Genetic Aspects of the Formation of Dairi Zn-Pb-Ag Deposit, Sumatra, International Symposium on Earth Science and Technology 2018, 106-110, 2018.12.
50. Albano Mahecha, Yutaro Umetsu, Nurredin Saadi, Thomas Tindell, Kotaro Yonezu, Akira Imai and Koichiro Watanabe, Assessment of Carbon Dioxide Flux in Relation to Permeable Structures at Meru Volcano, northern Tanzania, International Symposium on Earth Science and Technology 2018, 206-210, 2018.12.
51. Juhri Saefudin, Kotaro Yonezu, Takushi Yokoyama, Agung Harijoko, Nurpratama, M. I, Deposition Behavior of Silica Scale at Open Canal System, Dieng Geothermal Power Plant, Indonesia, International Symposium on Earth Science and Technology 2018, 373-376, 2018.12.
52. Htet Sandar Aung, Kotaro Yonezu, Akira Imai, Koichiro Watanabe, Thomas Tindell and May Thwe Aye, Preliminary Investigation of Host Rock Geochemistry and Gold Mineralization in EE3 Gold Prospect, Sagaing Region, Northern Myanmar, International Symposium on Earth Science and Technology 2018, 589-594, 2018.12.
53. Sai Pyae Sone, Kotaro Yonezu, Akira Imai and Koichiro Watanabe, The Mineralogical Characteristics of Gold Mineralization in Tagun-Khin-Dan Area in Slate Belt of Central Myanmar, International Symposium on Earth Science and Technology 2018, 595-598, 2018.12.
54. Mizuki. Fujisaki, Sachihiro Taguchi, Hitoshi Chiba, Yi-Cia lu, Hei-Di Lin, Sheng-Rong Song, Po-Tsun Li, Chi-Hsuan Chen, Jiin-Fa Lee, Kotaro Yonezu, Koichiro Watanabe, Hydrothermal Alteration at the Shu-Huang-Ping and Huang-Shan Steaming Ground, Tatun Volcanic Group, Taiwan, International Symposium on Earth Science and Technology 2018, 614-617, 2018.12.
55. Takaaki Chuuman, Kinnosuke Eguchi, Marina Akinaga, Daisuke Kawamoto, Shigeki Horii, Kotaro Yonezu, Koichiro Watanabe and Takushi Yokoyama, Strange Elution Behavior of Silicic Acid during Regenetarion of Strong Base Anion Exchange Resin Column, International Symposium on Earth Science and Technology 2018, 618-621, 2018.12.
56. Thomas Tindell, Koichiro Watanabe, Akira Imai, Ryohei Takahashi, Adrian J. Boyce, Kotaro Yonezu, Anders Schersten, Laurence Page, Takeyuki Ogata, The Kago low-sulfidation gold and silver deposit
A peripheral mineralisation to the Nansatsu high-sulfidation system, southern Kyushu, Japan, Ore Geology Reviews, 10.1016/j.oregeorev.2017.10.027, 102, 951-966, 2018.11, [URL].
57. Guillaume D. Faye, Atsushi Yamaji, Kotaro Yonezu, Thomas Tindell, Koichiro Watanabe, Paleostress and fluid-pressure regimes inferred from the orientations of Hishikari low sulfidation epithermal gold veins in southern Japan, Journal of Structural Geology, 10.1016/j.jsg.2018.03.002, 110, 131-141, 2018.05, [URL].
58. Huan Li, Aung Zaw Myint, Kotaro Yonezu, Koichiro Watanabe, Thomas J. Algeo, Jing Hua Wu, Geochemistry and U–Pb geochronology of the Wagone and Hermyingyi A-type granites, southern Myanmar
Implications for tectonic setting, magma evolution and Sn–W mineralization, Ore Geology Reviews, 10.1016/j.oregeorev.2018.03.015, 95, 575-592, 2018.04, [URL].
59. Aung Zaw Myint, Kotaro Yonezu, Adrian J. Boyce, David Selby, Anders Scherstén, Thomas Tindell, Koichiro Watanabe, Ye Myint Swe, Stable isotope and geochronological study of the Mawchi Sn-W deposit, Myanmar
Implications for timing of mineralization and ore genesis, Ore Geology Reviews, 10.1016/j.oregeorev.2018.03.014, 95, 663-679, 2018.04, [URL].
60. Barbie Ross B. Villaplaza, Alfred Elmer Buena, Nichole Anthony D. Pacle, Betchaida D. Payot, Jillian Aira S. Gabo-Ratio, Noelynna T. Ramos, Carla B. Dimalanta, Decibel V. Faustino-Eslava, Karlo L. Queaño, Graciano P. Yumul, Kotaro Yonezu, Alteration and lithogeochemistry in the Masara gold District, Eastern Mindanao, Philippines, as tools for exploration targeting, Ore Geology Reviews, 10.1016/j.oregeorev.2017.09.004, 91, 530-540, 2017.12, [URL].
61. Hnin Thet LWIN, Kotaro YONEZU, I wayan WARMADA, Lucas Donny SETIJADJI, Koichiro WATANABE and Bambang ANTORO, Lateral Variation of Mineralogical Assemblage in Plutonic Rocks in Ertsberg Intrusion Complex, Ertsberg Mining District, West Papua, Indonesia, International Symposium on Earth Science and Technology 2017, 76-81, 2017.12.
62. Guillaume D. FAYE, Atsushi YAMAJI, Kotaro YONEZU, Thomas D. TINDELL and Koichiro WATANABE, Occurrence of Pressure Seals During the Hishikari Mineralization (SW Japan) Revealed by Depth-dependent Driving Pressure Variation, International Symposium on Earth Science and Technology 2017, 82-86, 2017.12.
63. Khayay OO, Kotaro YONEZU, I wayan WARMADA, Anastasia Dewi TITISARI and Koichiro WATANABE, Ore and Alteration Mineral Characteristics of High Sulfidation Epithermal Mineralization of Cisuru Prospect, Papandayan District, West Java, Indonesia, International Symposium on Earth Science and Technology 2017, 87-91, 2017.12.
64. Mourad CHERBAL, Kotaro YONEZU, D. E. AISSA, Thomas D. TINDELL and Koichiro WATANABE, Rare Earth Elements Geochemistry and Mineralogy of Amesmessa Carbonatite from Western Hogger, Southern Algeria

, International Symposium on Earth Science and Technology 2017, 92-97, 2017.12.
65. Yudai HIRANO, Thomas D. TINDELL, Kotaro YONEZU, Koichiro WATANABE and SYAFRIZAL , Ore Mineralogy and Fluid Inclusion Microthermometry of the Talang Santo Low-Sulfidation Deposit, South Sumatra, Indonesia, International Symposium on Earth Science and Technology 2017, 245-250, 2017.12.
66. Shinji KAWAGUCHI, Kotaro YONEZU, Thomas D. TINDELL, Koichiro WATANABE, Jun-ichiro ISHIBASHI, Kazushiro SHIMADA and Tatsuo NOZAKI, The Two Types of Silver Mineralization Processes during Chimney Ore Formation at the Bayonnaise Knoll, Izu-Bonin Arc
, International Symposium on Earth Science and Technology 2017, 251-255, 2017.12.
67. Shota NAKAO, Kotaro YONEZU, Thomas D. TINDELL, Mega F. ROSANA and Benny BENSAMAN, Variation of Skarn Mineral and Fluid Evolution of DMLZ Skarn Deposit, Ertsberg Mining District, Papua, Indonesia, International Symposium on Earth Science and Technology 2017, 256-261, 2017.12.
68. Nobuhiro MUKAE, Kotaro YONEZU, Thomas D. TINDELL, Jun-ichiro ISHIBASHI and Tatsuo NOZAKI , Characteristics of Ore-forming Fluids in Izena Hole, Okinawa Trough, International Symposium on Earth Science and Technology 2017, 262-265, 2017.12.
69. Katsuhito TERASHIMA, Kotaro YONEZU, Thomas D. TINDELL, Adrian BOYCE, Mega F. ROSANA and Benny BENSAMAN, Mineralization Characteristics of the Grasberg Porphyry Cu-Au Deposit, Indonesia: Implication for Ore-forming Fluid Evolution
, International Symposium on Earth Science and Technology 2017, 266-270, 2017.12.
70. Nyein Nyein SINT, Kotaro YONEZU, Thomas D. TINDELL, May Thwe AYE and Koichiro WATANABE , Alteration and Mineralization of Copper-gold Skarn Deposit in Shwe Min Bon Area, Kalaw Township, Southern Shan State, Myanmar, International Symposium on Earth Science and Technology 2017, 281-286, 2017.12.
71. Aung Aung ZARNI, Agung HARIJOKO, Anastasia Dewi TITISARI, Kotaro YONEZU and Koichiro WATANABE , Hydrothermal Alteration and Ore Mineralogy in the Sentul Gold Prospect, Trenggalek Area, East Java, Indonesia, International Symposium on Earth Science and Technology 2017, 287-291, 2017.12.
72. Edward GICHUKI, Kotaro YONEZU and Koichiro WATANABE , Prospecting for Permeable Zones by Spatial Analysis of Radon and CO2 in Soil Gas in the Menengai Geothermal Field, Kenya, International Symposium on Earth Science and Technology 2017, 293-298, 2017.12.
73. Hitoshi INOUE, Kotaro YONEZU, Koichiro WATANABE and Takushi YOKOYAMA , Polymerization of Silicic Acid in Geothermal Water: Bahavior of Aluminum, International Symposium on Earth Science and Technology 2017, 305-310, 2017.12.
74. Yoki KITAYAMA, Kotaro YONEZU, Jillian A. GABO-RATIO, Adrian BOYCE, Jayvhel GUZMAN, Edna LAGUERTA and Rogel SANTOS , Investigation of Sc Hosting Minerals and O and H isotope Analysis for Goethite in Nickel Laterite Deposits, Carrascal and Southern Dinagat Island, Philippines, International Symposium on Earth Science and Technology 2017, 411-415, 2017.12.
75. Seang SIRISOKHA, Tetsuya NAKANISHI, Kotaro YONEZU, Koichiro WATANABE and Bun Kim NGUN , Initial Study on Alteration, Mineralization and Fluid Inclusion Microthermometry in Oyadav South, Ratanakiri, Cambodia, International Symposium on Earth Science and Technology 2017, 421-425, 2017.12.
76. Tomy Alvin RIVAI, Kotaro YONEZU, SYAFRIZAL and Koichiro WATANABE , Preliminary Petrological and Mineralogical Study on Host Rocks and Orebodies in Dairi Zn-Pb±Ag Deposit, North Sumatra, Indonesia, International Symposium on Earth Science and Technology 2017, 426-431, 2017.12.
77. Kyaw Min KHAING, Kotaro YONEZU, May Thwe AYE, Tin Aung MYINT and Koichiro WATANABE , Geology and Mineralogical Characteristic of Wabo Gold Prospect Area, Singu Township, Mandalay Region, Myanmar, International Symposium on Earth Science and Technology 2017, 657-662, 2017.12.
78. Sai Pyae SONE, Kotaro YONEZU, Koichiro WATANABE and Kenzo SANEMATSU , The Characteristics of Epithermal Gold Mineralization at Mong Yu, Shan East, Myanmar, International Symposium on Earth Science and Technology 2017, 668-672, 2017.12.
79. Shota INOUE, Kotaro YONEZU, Hironori OHASHI and Takushi YOKOYAMA , Dispersibility of Rare Earth Elements Doped in Silica Glass: Effect of Total REE and Al, International Symposium on Earth Science and Technology 2017, 673-677, 2017.12.
80. Deris HENDRIAWAN, Kotaro YONEZU, Mega F. ROSANA, Noor Cahyo D. ARYANTO, Geochemical Characteristics of Unconsolidated Sediments in Shallow Marine Area Bangka Island, Indonesia: Implication for Sn Placer Deposit Exploration
, International Symposium on Earth Science and Technology 2017, 678-683, 2017.12.
81. Myo Min TUN, Kotaro YONEZU and Koichiro WATANABE , Laumontite Mineralization in the Cijulang High-Sulfidation Epithermal Deposit, West Java, Indonesia, International Symposium on Earth Science and Technology 2017, 690-693, 2017.12.
82. Albano MAHECHA, Nurredin SAADI, Kotaro YONEZU and Koichiro WATANABE , Lineament Extraction Using SRTM Data on Geothermally Potential Northern Tanzania Volcanic Area, International Symposium on Earth Science and Technology 2017, 694-697, 2017.12.
83. Kyaw Thu HTUN, Kotaro YONEZU, Aung Zaw MYINT, Thomas D. TINDELL and Koichiro WATANABE , Petrological and Mineralogical Characteristics of Sn-W Mineralization in Tagu Prospect, Myeik District, Tanintharyi Region, Myanmar, International Symposium on Earth Science and Technology 2017, 698-701, 2017.12.
84. Fadiah PRATIWI, Kotaro YONEZU, Agung HARIJOKO, Koichiro WATANABE, M. Istiawan NURPRATAMA and ELFINA , Subsurface Hydrothermal Alteration at Patuha Geothermal Field, West Java, Indonesia: Insight from Well PT-1, International Symposium on Earth Science and Technology 2017, 702-705, 2017.12.
85. Mourad CHERBAL, Kotaro YONEZU and Koichiro WATANABE, Geochemical and Mineralogical Characteristics of the Amesmessa Metamorphosed Carbonatite, Southern Algeria
, 7th Asia Africa Mineral Resources Conference 2017, 2017.11.
86. Guillaume D. FAYE, Atsushi YAMAJI, Kotaro YONEZU, Thomas D. TINDELL and Koichiro WATANABE , Spatio-Temporal Variations of the Driving Pressure in the Hishikari Gold Deposit (Southern Kyushu, Japan), 7th Asia Africa Mineral Resources Conference 2017, 2017.11.
87. Nyein Nyein SINT, Kotaro YONEZU, Thomas D. TINDELL, Tun Naing ZAW, Htay WIN and Koichiro WATANABE, Genetic Implication of Ore Formation at the Shwe Min Bon, Southern Shan State, Myanmar
, 7th Asia Africa Mineral Resources Conference 2017, 2017.11.
88. Kyaw Thu HTUN, Kotaro YONEZU, Aung Zaw MYINT, Thomas D. TINDELL and Koichiro WATANABE , Petrology and Geochemical Studies on Tin Granite in Tagu Prospect, Myeik District, Tanintharyi Region, Myanmar, 7th Asia Africa Mineral Resources Conference 2017, 2017.11.
89. Sai Pyae SONE, Kotaro YONEZU, Koichiro WATANABE, Kenzo SANEMATSU and Ye Mying SWE , Geology Mineralogy and Fluid Inclusion Study of Gold Mineralization at Mong Yu, Shan East, Myanmar, 7th Asia Africa Mineral Resources Conference 2017, 2017.11.
90. Shota NAKAO, Kotaro YONEZU, Thomas D. TINDELL, Mega Fatimah ROSANA and Benny BENSAMAN , Fluid Evolution and Characteristics of Cu-Au Mineralization, DMLZ Deposit, Papua, Indonesia, 7th Asia Africa Mineral Resources Conference 2017, 2017.11.
91. Aung Zaw MYINT, Kotaro YONEZU and Koichiro WATANABE, Granite-related Sn-W Mineralization in Dawei, Southern Myanmar
, 7th Asia Africa Mineral Resources Conference 2017, 2017.11.
92. R. A. SANTOS, Kotaro YONEZU, J. A. GABO-RATIO, O. T. A. ALFONSO, M. B. M.C. JUMANGIT, A. V. DURAN, E. L. LAGUERTA-HAY and A. E. GABATA , Harzburgite, Serpentinization, and the Garnierite Formation, 7th Asia Africa Mineral Resources Conference 2017, 2017.11.
93. Shota INOUE, Kotaro YONEZU, Hironori OHASHI and Takushi YOKOYAMA, Preparation of Rare Earth Elements-Containing Silica Glass: Utilization as a Solid Standard Sample
, 7th Asia Africa Mineral Resources Conference 2017, 2017.11.
94. Hitoshi INOUE, Kotaro YONEZU, Koichiro WATANABE and Takushi YOKOYAMA , Removal of Silicic Acid and Aluminum from Geothermal Water, 7th Asia Africa Mineral Resources Conference 2017, 2017.11.
95. Myo Min TUN, Kotaro YONEZU, May Thet AYE, Min AUNG, Than Than NU and Koichiro WATANABE , Ore Mineralogy and Paragenesis of Pb-Zn-Ag±Au Mineralization in the Sharchet Area, Thabeikkyin Township, Mandalay Region, Myanmar, 7th Asia Africa Mineral Resources Conference 2017, 2017.11.
96. May Thwe AYE, Myo Kyaw HLAING, Deline ZAW, Koichiro WATANABE and Kotaro YONEZU , Fluid Inclusion Study of Shwegyin Gold Deposit, Bago Region, Myanmar, 7th Asia Africa Mineral Resources Conference 2017, 2017.11.
97. Yu Yu MYAING, Arifudin IDRUS, Anastasia Dewi TITISARI and Kotaro YONEZU , Texture and Form of Mineralization of High Sulfidation Epithermal Gold Deposit at Tumpang Pitu, Banyuwangi Regency, East Java Province, Indonesia, 7th Asia Africa Mineral Resources Conference 2017, 2017.11.
98. Yudai HIRANO, Thomas D. TINDELL, Kotaro YONEZU, Koichiro WATANABE and SYAFRIZAL , Exploration Indicator Based on Hydrothermal Alteration and Gold Mineralization in Talang Santo Epithermal Low-Sulfidation Deposito, Southern Sumatra, Indonesia, 7th Asia Africa Mineral Resources Conference 2017, 2017.11.
99. Katsuhito TERASHIMA, Kotaro YONEZU, Thomas D. TINDELL, Adrian BOYCE, Mega F. ROSANA and Benny BENSAMAN , Mafic Signature at the Grasberg Porphyry Deposit, Indonesia: Contribution for the Cu-Au Mineralization, 7th Asia Africa Mineral Resources Conference 2017, 2017.11.
100. Nobuhiro MUKAE, Kotaro YONEZU, Thomas D. TINDELL, Jun-ichiro ISHIBASHI, Tatsuo NOZAKI, Ken TAKAI and Koichiro WATANABE , Geochemical Characteristics of Ore-Forming Fluids in Iheya North Knoll, Okinawa Trough, 7th Asia Africa Mineral Resources Conference 2017, 2017.11.
101. Syafrizal, Tomy Alvin Rivai, Kotaro Yonezu, Damar Kusumanto, Koichiro Watanabe, Arie Naftali Hawu Hede, Characteristics of a low-sulfidation epithermal deposit in the River Reef Zone and the Watuputih Hill, the Poboya gold prospect, Central Sulawesi, Indonesia
Host rocks and hydrothermal alteration, Minerals, 10.3390/min7070124, 7, 7, 2017.07, [URL].
102. Huan Li, Kotaro Yonezu, Koichiro Watanabe, Thomas Tindell, Fluid origin and migration of the Huangshaping W–Mo polymetallic deposit, South China
Geochemistry and 40Ar/39Ar geochronology of hydrothermal K-feldspars, Ore Geology Reviews, 10.1016/j.oregeorev.2017.02.005, 86, 117-129, 2017.06, [URL].
103. Sachi Masunaga, Kotaro Yonezu, Mayumi Etou, Daisuke Kawamoto, Yoshiki Yamamoto, Yumi Kiyota, Yoshihiro Okaue, Koichiro Watanabe, Takushi Yokoyama, Effect of polyacrylic acid on polymerization and deposition of silicic acid in geothermal water
A case study at Takigami geothermal power plant, Oita Prefecture
地熱熱水中のケイ酸の重合と沈殿に及ぼすポリアクリル酸の影響:大分県滝上発電所でのケーススタディ, Journal of the Geothermal Research Society of Japan, 10.11367/grsj.39.181, 39, 4, 181-189, 2017.01, [URL].
104. Aung Zaw Myint, Khin Zaw, Ye Myint Swe, Kotaro Yonezu, Yue Cai, Takayuki Manaka, Koichiro Watanabe, Geochemistry and geochronology of granites hosting the Mawchi SN-W deposit, Myanmar
Implications for tectonic setting and emplacement, Geological Society Memoir, 10.1144/M48.17, 385-400, 2017.01, [URL].
105. Sarantuya Oyungerel, TETSUYA NAKANISHI, KOTARO YONEZU, Koichiro Watanabe, Jargalan, The Characteristics of Mineralogy, Geochemistry and Ore Fluid of the Olon Ovoot Gold Deposit, South Mongolia, International Symposium on Earth Science and Technology 2016, 440-446, 2016.12.
106. Albano Mahecha, Samatar Abdi, KOTARO YONEZU, Hydrothermal mineral alteration of the Tsukahara and Silent Hell geothermal areas of the Beppu Geothermal Field, International Symposium on Earth Science and Technology 2016, 628-631, 2016.12.
107. G. Haganje, KOTARO YONEZU, Aacharya Sabita, Koichiro Watanabe, Takushi Yokoyama, Preliminary Research on the Role of Surfactant on the Polymerization of Monosilicic Acid: Implication to the Prevention of Silica Scaling from Geothermal Water, International Symposium on Earth Science and Technology 2016, 576-579, 2016.12.
108. A. Aguilera. Pradenas, J. Gabo, KOTARO YONEZU, E. Andal, Mineralization characteristics of Taka Barr vein in Sangilo epithermal gold mine, Baguio district, Philippines, International Symposium on Earth Science and Technology 2016, 453-455, 2016.12.
109. Munkhzaya Batjargal, TETSUYA NAKANISHI, Oyungerel SARANTUYA, KOTARO YONEZU, Koichiro Watanabe, Jargalan, Gold Mineralization Style at the Zuun Sarinal Deposit, Southgobi, Mongolia, International Symposium on Earth Science and Technology 2016, 447-452, 2016.12.
110. Y. HIRANO, T. Tindell, KOTARO YONEZU, Koichiro Watanabe, Syafrizal, Preliminary Study on the Alteration of the Talang Santo Low-Sulfidation Epithermal Gold Deposit, Lampung Province, Indonesia, International Symposium on Earth Science and Technology 2016, 435-439, 2016.12.
111. K. Terashima, KOTARO YONEZU, T. Tindell, Ety Suryani, M. Rosana, Mineralization Characteristics of the Lebong Tambang Gold Deposit, Southern Sumatra, Indonesia, International Symposium on Earth Science and Technology 2016, 430-434, 2016.12.
112. Febby PRATAMA, KOTARO YONEZU, M. Rosana, Koichiro Watanabe, A Preliminary Study of Gold Mineralization at Pasir Karang Prospect, Kerta Area, Banten Province, Indonesia, International Symposium on Earth Science and Technology 2016, 424-429, 2016.12.
113. Lin Lin Lhun KOE, KOTARO YONEZU, Koichiro Watanabe, Geology and Geochemical Characteristics of Wetthe Area, Thabeikkyin Gold District, Mandalay Region at Central Myanmar, International Symposium on Earth Science and Technology 2016, 413-417, 2016.12.
114. K. IKEDA, M. T. Aye, Nyein Nyein Sint, KOTARO YONEZU, Koichiro Watanabe, Alteration Mineralogy Associated with Gold Mineralization and Mineral Assemblage of Lunhto Deposit, Kalaw region, Shweminbon Area in Myanmar, International Symposium on Earth Science and Technology 2016, 408-412, 2016.12.
115. Myo Kyaw Hliang, KOTARO YONEZU, M. T. Aye, Aung Zaw Myint, Koichiro Watanabe, Geology and Mineralogical Characteristics of Zibyaung Gold Deposit at Kyaikhto Area, Southern Myanmar, International Symposium on Earth Science and Technology 2016, 403-407, 2016.12.
116. J. MAEDA, TETSUYA NAKANISHI, Oyungerel SARANTUYA, KOTARO YONEZU, Koichiro Watanabe, Jargalan, Gold Mineralization and Ore Mineralogy at the Goyot Ulaan Au Deposit, Southern Mongolia, International Symposium on Earth Science and Technology 2016, 326-330, 2016.12.
117. Yu Yu Myaing, Arifudin Idrus, Dewi Titisari, KOTARO YONEZU, Geology and Mineralization Characteristics of the Tumpang Pitu High Sulfidation Epithermal Gold Deposit in Banyuwangi Regency, East Java Province, Indonesia, International Symposium on Earth Science and Technology 2016, 320-325, 2016.12.
118. Win Phyo, KOTARO YONEZU, Koichiro Watanabe, Ore Forming Conditions of Metasedimentary Rock Hosted Gold Mineralization, Phayaung Taung Area, Mandalay Region, Central Myanmar, International Symposium on Earth Science and Technology 2016, 314-319, 2016.12.
119. Sai PYAE SONE, KOTARO YONEZU, Koichiro Watanabe, Geology, Mineralogy and Geochemical Characteristics of Mong Yu Gold Mineralization, Shan East, Myanmar, International Symposium on Earth Science and Technology 2016, 308-313, 2016.12.
120. M. Cherbal, KOTARO YONEZU, D. J. AISSA, T. Tindell, Koichiro Watanabe, Metacarbonatite of marble?-the case of the carbonate, pyroxenite, calcite-apatite rock complex at Amesmessa, Western Hoggar shield, Algeria, International Symposium on Earth Science and Technology 2016, 279-287, 2016.12.
121. Nyein Nyein Sint, KOTARO YONEZU, T. Tindell, M. T. Aye, Koichiro Watanabe, Geology and Mineralization of Skarn Deposits in Bwet Taung Prospect, Kalaw Township, Shan State, Myanmar, International Symposium on Earth Science and Technology 2016, 274-278, 2016.12.
122. A. Goda, A. Z. Myint, KOTARO YONEZU, Ore Mineralogy and Fluid Inclusion Microthermometry Study on Sabe Taung Copper Prospect, Central Myanmar, International Symposium on Earth Science and Technology 2016, 268-273, 2016.12.
123. Aung Tay Zar, I. Wayan Warmada, Lucas Donny Setijadji, KOTARO YONEZU, Koichiro Watanabe, Ore and Alteration Mineralogy of Onzon-Kanbani Gold Deposit, Thabeikkyin Township, Mandalay Region, Myanmar: Implication for Deposit Genesis, International Symposium on Earth Science and Technology 2016, 262-267, 2016.12.
124. Tomy RIVAI, KOTARO YONEZU, Syafrizal, K. SANEMATSU, Damar KUSUMANTO, Koichiro Watanabe, Coexistence of Quartz-Calcite Veins and Ore Minerals at the River Reef Zone, the Poboya Gold Prospect, Central Sulawesi, Indonesia, International Symposium on Earth Science and Technology 2016, 256-261, 2016.12.
125. Y. Kawamoto, KOTARO YONEZU, H. Ohashi, 川本 大祐, Takushi YOKOYAMA, T. Honma, Evaluation on the Uniformity of Rare Earth Elements in REE Doped Silica Glass as Reference Material by Sol-gel Method, International Symposium on Earth Science and Technology 2016, 223-228, 2016.12.
126. Guillaume D. FAYE, Koichiro Watanabe, A. Yamaji, KOTARO YONEZU, Comparative Paleostress Analysis of the Honko-Sanjin and Yamada Subdeposits (Hishikari Deposit, Southern Kyushu, Japan), using GArcmB, International Symposium on Earth Science and Technology 2016, 211-215, 2016.12.
127. Sohrab RUSTAMI, N. SAADI, Essam ABOUD, KOTARO YONEZU, Koichiro Watanabe, Integrating Gravitiy Data with Remotel Sensed Data for Geological Investigation of Central Afghanistan, International Symposium on Earth Science and Technology 2016, 112-116, 2016.12.
128. W. S. Ibrahim, Koichiro Watanabe, Kotaro Yonezu, Structural and litho-tectonic controls on Neoproterozoic base metal sulfide and gold mineralization in North Hamisana shear zone, South Eastern Desert, Egypt
The integrated field, structural, Landsat 7 ETM+ and ASTER data approach, Ore Geology Reviews, 10.1016/j.oregeorev.2016.05.012, 79, 62-77, 2016.12, [URL].
129. Waleed Ibrahim, Koichiro Watanabe, KOTARO YONEZU, Integrating remote sensing, structural and geological data for deriving controls on base-metal sulfide at Wadi Ibib area, South Eastern Desert, Egypt, 6th Asia Africa Mineral Resources Conference 2016, 2016.09.
130. K. Terashima, KOTARO YONEZU, T. Tindell, Ety SURYANI, M. ROSANA, Preliminary Study on the Condition of Gold Mineralization at the Libong Tambang Gold Deposit, Southern Sumatra, Indonesia, 6th Asia Africa Mineral Resources Conference 2016, 2016.09.
131. Febby Yudhi PRATAMA, KOTARO YONEZU, Koichiro Watanabe, M. ROSANA, An Initial Investigationn of Vein Composition at Pasir Karang Prospect, Kerta Area, banten Province, Indonesia, 6th Asia Africa Mineral Resources Conference 2016, 2016.09.
132. Tomy RIVAI, KOTARO YONEZU, Syafrizal, Damar Kusumanto, Koichiro Watanabe, Preliminary Assessment on the Hydrothermal Alteration at the River Reef Zone, the Pobaya Gold Prostpect, Central Sulawesi, Indonesia, 6th Asia Africa Mineral Resources Conference 2016, 2016.09.
133. T. Tindell, T. Hase, Syafrizal, KOTARO YONEZU, Characteristics of the Kencana low-sulfidation epithermal deposit, Halmahera, Indonesia, 6th Asia Africa Mineral Resources Conference 2016, 2016.09.
134. Warda SAAD, D. E. AISSA, KOTARO YONEZU, Trace Elements Concentrations in Native Gold and Sulphides at Tirek gold deposit (Hoggar Shield, South Algeria): Evidence from SEM-EDS analyses, 6th Asia Africa Mineral Resources Conference 2016, 2016.09.
135. Ariam Aguilera Pradenas, Jillian GABO, KOTARO YONEZU, Mineralization Characteristics of the Taka Barr Vein in Sangilo Epithermal Gold Mine, Baguio District, Philippine, 6th Asia Africa Mineral Resources Conference 2016, 2016.09.
136. Yoki KITAYAMA, KOTARO YONEZU, Jillian GABO, Alfonso O, Duran A., Espallardo A, Santos R., Preliminary Geochemical Study on the Nickel Laterite Deposit, South Dinagat Island, Philippines, 6th Asia Africa Mineral Resources Conference 2016, 2016.09.
137. Sarantuya OYUNGEREL, TETSUYA NAKANISHI, KOTARO YONEZU, Koichiro Watanabe, S. Jargalan, Olon Ovoot Gold Deposit: Implication of Gold Mineralization Sequence and Fluid Characteristics, 6th Asia Africa Mineral Resources Conference 2016, 2016.09.
138. M. BATJARGAL, TETSUYA NAKANISHI, KOTARO YONEZU, Koichiro Watanabe, S. Jargalan, Petrographic, mineralogical and geochemical study of Zuun Sarinal gold deposit, Southgobi, Mongolia, 6th Asia Africa Mineral Resources Conference 2016, 2016.09.
139. S. RUSTAMI, N. SAADI, Essam ABOUD, KOTARO YONEZU, Koichiro Watanabe, Using ALOS Images, Gravity Data and Mineralogical analysis for Geological Investigations in the Hajigak Iron Deposit, Central Afghanistan, 6th Asia Africa Mineral Resources Conference 2016, 2016.09.
140. Lin Lin Khun KOE, KOTARO YONEZU, Koichiro Watanabe, Geology and Gold Mineralization at Wetthe Area, Thabeikkyin gold district, Mandalay region, Central Myanmar, 6th Asia Africa Mineral Resources Conference 2016, 2016.09.
141. Nyein Nyein Sint, KOTARO YONEZU, Thomas Tindell, Koichiro Watanabe, Mineralogical characteristic of gold-copper bearing skarn deposit in Bwet Taung prospect, Shwe Min Bon, Shan State, Myanmar, 6th Asia Africa Mineral Resources Conference 2016, 2016.09.
142. N. Mukae, KOTARO YONEZU, Thomas Tindell, Junichiro Ishibashi, T. NOZAKI, K. TAKAI, Koichiro Watanabe, Fluid Inclusion Study and Ore Mineral Assemblage in Core Samples Collected from Submarine Hydrothermal Fields in the Okinawa Trough, 6th Asia Africa Mineral Resources Conference 2016, 2016.09.
143. KOTARO YONEZU, Y. KAWAMOTO, Thomas Tindell, H. Ohashi, Takushi YOKOYAMA, Evaluation of Uniformity and Dispersibility of Synthesized Geo-reference Material: Rare Earth Eliments Doped Silica Glass, 6th Asia Africa Mineral Resources Conference 2016, 2016.09.
144. Adi Maulana, Akira Imai, Theo Van Leeuwen, Koichiro Watanabe, Kotaro Yonezu, Takanori Nakano, Adrian Boyce, Laurence Page, Anders Schersten, Origin and geodynamic setting of Late Cenozoic granitoids in Sulawesi, Indonesia, Journal of Asian Earth Sciences, 10.1016/j.jseaes.2016.04.018, 124, 102-125, 2016.07, [URL].
145. Mamiko Yamashita Maeno, Hironori Ohashi, Kotaro Yonezu, Akane Miyazaki, Yoshihiro Okaue, Koichiro Watanabe, Tamao Ishida, Makoto Tokunaga, Takushi Yokoyama, Sorption behavior of the Pt(II) complex anion on manganese dioxide (δ-MnO2)
a model reaction to elucidate the mechanism by which Pt is concentrated into a marine ferromanganese crust, Mineralium Deposita, 10.1007/s00126-015-0599-7, 51, 2, 211-218, 2016.02, [URL].
146. Agung Harijoko, Ryusuke Uruma, Haryo Edi Wibowo, Lucas Doni Setijadji, Akira Imai, Kotaro Yonezu, Koichiro Watanabe, Geochronology and magmatic evolution of the Dieng Volcanic Complex, Central Java, Indonesia and their relationships to geothermal resources, Journal of Volcanology and Geothermal Research, 10.1016/j.jvolgeores.2015.12.010, 310, 209-224, 2016.01, [URL].
147. Sarantuya Oyungerel, TETSUYA NAKANISHI, KOTARO YONEZU, TINDELL THOMAS DAVID, Koichiro Watanabe, Jargalan, Preliminary Study of Mineralization, The Olon Ovoot Gold Deposit, Ulziit Metallogenic Belt,
Southern Mongolia, International Symposium on Earth Science and Technology 2015, 2015.12.
148. Win Phyo, KOTARO YONEZU, Aung Zaw Myint, Koichiro Watanabe, Geological and Mineralogical Study of Phayaung Taung Gold Deposit, Mandalay Region, Central
Myanmar, International Symposium on Earth Science and Technology 2015, 2015.12.
149. Lin Lin Khun Koe, Aung Zaw Myint, KOTARO YONEZU, Koichiro Watanabe, Initial Study of Gold Mineralization at Wetthe Area, Thabeikkyin Gold District, Mandalay
Region, Central Myanmar, International Symposium on Earth Science and Technology 2015, 2015.12.
150. Akihiro Goda, Aung Zaw Myint, KOTARO YONEZU, K. Oo, Koichiro Watanabe, Initial Interpretation for Copper-Gold Mineralization in Sabe Taung Area, Central Myanmar Based
on Mineralogy, International Symposium on Earth Science and Technology 2015, 2015.12.
151. A. Kuroda, KOTARO YONEZU, M. F. Rosana, S. PRIHATMOKO, Koichiro Watanabe, Laurence Page, Geochronological and Mineralogical Studies on Adularia-Quartz Vein of Kerta Area, Banten
Regency, Indonesia, International Symposium on Earth Science and Technology 2015, 2015.12.
152. M. Cherbal, KOTARO YONEZU, D. E. Aissa, Koichiro Watanabe, The Carbonatitic Origin of Carbonated Rocks from Amesmessa, Western Hoggar, Algeria: Field
Evidence, International Symposium on Earth Science and Technology 2015, 2015.12.
153. Sohrab Rustami, N. Saadi, KOTARO YONEZU, Koichiro Watanabe, A Preliminary Study on Remote Sensing Data and Geochemical Analysis to Characterize Iron
Deposits in Hajigak, Afghanistan, International Symposium on Earth Science and Technology 2015, 2015.12.
154. Tomy Alvin Rivai, KOTARO YONEZU, Syafrizal, Koichiro Watanabe, Preliminary Investigation on the Quartz Veins and Host Rocks at the River Reef Zone, the Poboya
Gold Deposit, Central Sulawesi, Indonesia, International Symposium on Earth Science and Technology 2015, 2015.12.
155. Takashi Hase, KOTARO YONEZU, TINDELL THOMAS DAVID, Syafrizal, Koichiro Watanabe, The Characteristics and Paragenesis of the Tellurium-bearing Au-Ag Kencana Deposit,
Halmahera Island, Indonesia, International Symposium on Earth Science and Technology 2015, 2015.12.
156. Yuto Kawamoto, KOTARO YONEZU, Hirnori Ohashi, Takushi Yokoyama, Initial Study on the Uniformity of Rare Earth Elements Ions in REE Doped Silica Glass by Sol-gel
Method, International Symposium on Earth Science and Technology 2015, 2015.12.
157. Junro Maeda, TETSUYA NAKANISHI, Sarantuya Oyungerel, KOTARO YONEZU, Koichiro Watanabe, Jargalan, Primary Study of Mineralization at the Ulaan Hyar Au Deposit, Southern Mongolia, International Symposium on Earth Science and Technology 2015, 2015.12.
158. Buyankhishig BATSHUGAR, TETSUYA NAKANISHI, Jillian Gabo, KOTARO YONEZU, Koichiro Watanabe, Jargalan, Geochemistry and rare earth element mineralization in Mushgai Khudag area, South Mongolia, 5th Asia Africa Mineral Resources Conference 2015, 2015.07.
159. TINDELL THOMAS DAVID, Takashi Hase, Syafrizal, KOTARO YONEZU, Au-Ag-Te mineralisation of the Kencana epithermal Deposit, Halmahera Island, Indonesia, 5th Asia Africa Mineral Resources Conference 2015, 2015.07.
160. Habibullah Mirkhail, TINDELL THOMAS DAVID, KOTARO YONEZU, Koichiro Watanabe, Origin of sediment-hosted stratabond copper at Kabul Block, Afghanistan: a syngenetic view from Aynak deposit, 5th Asia Africa Mineral Resources Conference 2015, 2015.07.
161. Sarantuya Oyungerel, TETSUYA NAKANISHI, KOTARO YONEZU, TINDELL THOMAS DAVID, Koichiro Watanabe, Jargalan, Gold mineralization of the Olon Ovoot deposit in the Ulziit gold belt, Southern Mongolia, 5th Asia Africa Mineral Resources Conference 2015, 2015.07.
162. Akihiro Goda, Aung Zawa Myint, M. T. Soe, KOTARO YONEZU, Koichiro Watanabe, Geochemical study of beryl in Yebu and Taunggawa area, Central North Myanmar, 5th Asia Africa Mineral Resources Conference 2015, 2015.07.
163. Junro Maeda, TETSUYA NAKANISHI, Sarantuya Oyungerel, KOTARO YONEZU, Koichiro Watanabe, Jargalan, Characteristic of gold mineralization in the Goyot Ulaan gold deposit, Southern Mongolia, 5th Asia Africa Mineral Resources Conference 2015, 2015.07.
164. Keisuke Ikeda, Aung Zaw Myint, KOTARO YONEZU, Koichiro Watanabe, Hydrothermal activity of Zayiteing deposit in Thabeikkyin area, Myanmar, 5th Asia Africa Mineral Resources Conference 2015, 2015.07.
165. Waleed Ibrahim, KOTARO YONEZU, Koichiro Watanabe, Controls on pegmatite hosting U-Th ± REE mineralization at North Hamasana Shear Zone South Eastern Desert, Egypt, 5th Asia Africa Mineral Resources Conference 2015, 2015.07.
166. TINDELL THOMAS DAVID, Takashi Hase, Syafrizal, KOTARO YONEZU, Cd- and Te- mineralisation characteristics of the Kencana low-sulfidation epithermal deposit, Halmahera, Indonesia, 5th Asia Africa Mineral Resources Conference 2015, 2015.07.
167. Syafrizal, Jarot Wiratama, KOTARO YONEZU, Tomy Alvin Rivai, Preliminary Study on Hill Reef 1 and Hill Reef 2 Vein at the Pobaya Prospect, Based on Textural, 5th Asia Africa Mineral Resources Conference 2015, 2015.07.
168. Rogel Santos, Ramon Santos, KOTARO YONEZU, J.A.S. Gabo, Kosei Noda, Omar Theogenes Alfonso, E. Laguerta, Abigail P. Espallardo, Emmanuelle Villaflor, Antonio V. Duran, The limonite-saprolite boundary as "bonanza horizon" for metals in nickeliferous laterite, 5th Asia Africa Mineral Resources Conference 2015, 2015.07.
169. KOTARO YONEZU, Kosei Noda, J.A.S. Gabo, J. Juanerio, E. Laguerta, Ramon Santos, Rogel Santos, Initial geochemical research on scandium as by-product with MacroAsia's Infanta Ni Laterite Area, Southern Palawan, Philippines, 5th Asia Africa Mineral Resources Conference 2015, 2015.07.
170. J.A.S. Gabo, Kosei Noda, KOTARO YONEZU, Rogel Santos, Ramon Santos, E. Laguerta, B. Payot, Koichiro Watanabe, Preliminary LA-ICPMS results of nickel laterite profiles from the Infanta Laterite deposit, Palawan, Philippines: Insights into the geochemical behavior of Sc and other REE in weathered nickel laterite, 5th Asia Africa Mineral Resources Conference 2015, 2015.07.
171. W. S. Ibrahim, Koichiro Watanabe, M. E. Ibrahim, Kotaro Yonezu, Neoproterozoic Tectonic Evolution of Gabal Abu Houdied Area, South Eastern Desert, Egypt
As a Part of Arabian–Nubian Shield Tectonics, Arabian Journal for Science and Engineering, 10.1007/s13369-014-1521-9, 40, 7, 1947-1966, 2015.07, [URL].
172. Agus Didit Haryanto, Mega Rosana, TINDELL THOMAS DAVID, Jillian Gabo, Haris Yusuf, KOTARO YONEZU, Alteration, Ore Mineralogy, and Fluid Inclusion Microthermometry of the Rorah Kadal Quartz Vein in Cibaliung Goldfield, Western Java, Indonesia, ASEAN ENGINEERING JOURNAL PART C, 4, 2, 53-67, 2015.06.
173. Zhivko D. Budinov, Kotaro Yonezu, Thomas Tindell, Jillian Aira Gabo-Ratio, Stanoje Milutinovic, Adrian J. Boyce, Koichiro Watanabe, Copper-Gold Skarn Mineralization at the Karavansalija Ore Zone, Rogozna Mountain, Southwestern Serbia, Resource Geology, 10.1111/rge.12075, 65, 4, 328-344, 2015.01, [URL].
174. A. Kuroda, KOTARO YONEZU, M. F. Rosana, S. PRIHATMOKO, Koichiro Watanabe, Characteristics of the Ore Forming Fluid of the Low-Sulfidation Epithermal Gold-Silver Mineralization of Kerta Area, Banten Regency, Indonesia, Proceedings of the International Symposium on Earth Science and Technology 2014, 2014.12.
175. Myo Min Tun, I Wayan WARMADA, Arifudin IDRUS, Agung HARIJOKO, Okki VERDIANSYAH, KOTARO YONEZU, Koichiro Watanabe, Alunite Mineral Chemistry and Geochemistry of Acid Sulfate Alteration in Cijulang
Prospect, West Java, Indonesia
, Proceedings of the International Symposium on Earth Science and Technology 2014, 2014.12.
176. Habibullah MIRKHAIL, TINDELL THOMAS DAVID, KOTARO YONEZU, Koichiro Watanabe, Geology, Ore Mineralogy and Alteration of Aynak Sediment Hosted Stratabound Cu-Co
Deposit, Central Part of Kabul Block, Afghanistan
, Proceedings of the International Symposium on Earth Science and Technology 2014, 2014.12.
177. Kosei Noda, KOTARO YONEZU, J.A.S. Gabo, Koichiro Watanabe, J. Juanerio, E. Laguerta, Ramon Santos, Rogel Santos, Geochemical Characteristic of Scandium Based on Coprecipitation Experiment in Nickel-Laterite Deposit, South Part of Palawan, Philippines: An Initial Study, Proceedings of the International Symposium on Earth Science and Technology 2014, 2014.12.
178. Aung Zaw MYINT, Ryota Suzaki, KOTARO YONEZU, Koichiro Watanabe, Kyaw ZAYA, Geology of Dawei Sn-W District, Myanmar, Proceedings of the International Symposium on Earth Science and Technology 2014, 2014.12.
179. Zhivko BUDINOV, KOTARO YONEZU, Koichiro Watanabe, Characteristics of the Intrusive Rocks at Central Rogozna Mountain, Southwestern Servia, Proceedings of the International Symposium on Earth Science and Technology 2014, 2014.12.
180. Koki Okamura, Koichiro Watanabe, KOTARO YONEZU, H. Dang, D. Do, T. Tu, GEOCHEMICAL BEHAVIOR OF REE ASSOCIATED WITH LATERIZATION PROCESS IN DAK LAK PROVINCE, SOUTHERN VIETNAM, Proceedings of the 8th International Workshop and Conference on Earth Resources Technology, 2014.10.
181. TINDELL THOMAS DAVID, Takashi Hase, Syafrizal, KOTARO YONEZU, Au-Ag-Te mineralisation of the Kencana epithermal Deposit, Halmahera Island, Indonesia, 4th Asia Africa Mineral Resources Conference 2014, 2014.10.
182. Zhivko BUDINOV, KOTARO YONEZU, Koichiro Watanabe, Characteristics of the Sulfide Mineralization from the Skarns at Central Rogozna Mountain, Serbia, 4th Asia Africa Mineral Resources Conference 2014, 2014.10.
183. Habibullah MIRKHAIL, TINDELL THOMAS DAVID, KOTARO YONEZU, Koichiro Watanabe, Geology and Ore Mineralogy of Aynak Sediment Hosted Stratabound Cu-Co Deposit, Central Part of Kabul Prospective Block, Afghanistan, 4th Asia Africa Mineral Resources Conference 2014, 2014.10.
184. Ryota Suzaki, A. Z. Myeint, KOTARO YONEZU, Koichiro Watanabe, Preliminary Study Of Sn-W Mineralization In Bawapin-Wagone Area, Tanintharye Region, Myanmar, 4th Asia Africa Mineral Resources Conference 2014, 2014.10.
185. Buyankhishig BATSHUGAR, TETSUYA NAKANISHI, KOTARO YONEZU, Koichiro Watanabe, Jargalan, Geological Studies of Rare Earth Element Bearing Mushgai Khudag Deposit, Southern Mongolia, 4th Asia Africa Mineral Resources Conference 2014, 2014.10.
186. W. S. Ibrahim, Koichiro Watanabe, M. E. Ibrahim, Kotaro Yonezu, Controls on quartzite bearing base-metal sulfide and invisible gold mineralization at Gabal Abu Houdied area, South Eastern Desert, Egypt, Arabian Journal of Geosciences, 10.1007/s12517-014-1563-z, 8, 7, 4983-4997, 2014.07, [URL].
187. Huan Li, Koichiro Watanabe, Kotaro Yonezu, Geochemistry of A-type granites in the Huangshaping polymetallic deposit (South Hunan, China)
Implications for granite evolution and associated mineralization, Journal of Asian Earth Sciences, 10.1016/j.jseaes.2014.03.004, 88, 149-167, 2014.07, [URL].
188. Huan Li, Koichiro Watanabe, Kotaro Yonezu, Zircon morphology, geochronology and trace element geochemistry of the granites from the Huangshaping polymetallic deposit, South China
Implications for the magmatic evolution and mineralization processes, Ore Geology Reviews, 10.1016/j.oregeorev.2013.12.009, 60, 14-35, 2014.07, [URL].
189. Adi Maulana, Kotaro Yonezu, Koichiro Watanabe, Geochemistry of rare earth elements (REE) in the weathered crusts from the granitic rocks in Sulawesi Island, Indonesia, Journal of Earth Science, 10.1007/s12583-014-0449-z, 25, 3, 460-472, 2014.06, [URL].
190. Masunaga S, Etou M, Masaki Y, Kiyota Y, Yamamoto Y, Yonezu K, Okaue Y, Watanabe K, Yokoyama T , Experimental Study on the Effect of Polyacrylic Acid on the Growth of Silica Scale, Geotherm Res Soc Japan J
, 36, 1, 33-40, 2014.06.
191. S. AACHARYA, KOTARO YONEZU, N. Gaowa, Yoshihiro Okaue, Koichiro Watanabe, Takushi Yokoyama, Formation of Iron(III) oxyhydroxy sulfate mineral and mobilization of arsenic during oxidative decomposition of a natural pyrite (FeS2), International Journal of Global Science Research, 2, 3, 145-151, 2014.04.
192. 増永幸, 江藤真由美, 正木佑香, 清田由美, 山本芳樹, 米津 幸太郎, 岡上 吉広, 渡邊 公一郎, 横山拓史, シリカスケール生成に及ぼすポリアクリル酸の影響に関する実験的研究, 日本地熱学会誌, 36, 1, 33-40, 2014.01.
193. S. RATIB, Koichiro Watanabe, KOTARO YONEZU, Using Landsat ETM+ image and GIS for geological mapping and mineral exploration of pegmatites area, Laghman provice eastern Afghanistan, Proceedings of the International Symposium on Earth Science and Technology 2013, 328-332, 2013.12.
194. S. Ikeda, M. F. Rosana, KOTARO YONEZU, A. HARIANT, Koichiro Watanabe, Gold mineralization characteristics of te Cibitung vein and the Chikoneng vein in Cibaliung gold deposit, Western Java, Indonesia, Proceedings of the International Symposium on Earth Science and Technology 2013, 309-314, 2013.12.
195. A. Z. MYINT, Koichiro Watanabe, KOTARO YONEZU, M. C. THU, Mineralization style and vein forming stages of the Sn-W polymetallic deposit of Mawchi, Myanmar, Proceedings of the International Symposium on Earth Science and Technology 2013, 301-304, 2013.12.
196. Makoto Miyamoto, TETSUYA NAKANISHI, Ryohei Takahashi, Sachihiro Taguchi, KOTARO YONEZU, Koichiro Watanabe, S. Jargalan, Estimation of formation temperature and pressure of gold deposits around the Yeroogol trend, Northern Mongolia, Proceedings of International Symposium on Earth Science and Technology 2013, 284-287, 2013.12.
197. KOTARO YONEZU, Kosei Noda, J. Gabo, J. JUANERIO, E. LAGUERTA, Ramon Santos, Rogel Santos, Preliminary research on geochemical behavior of REE and PGE with laterite of MacroAsia's
Infanta Nickel Area, Palawan, Philippines
, Proceedings of the International conference on geological engineering, JICA RC, 2013.12.
198. A. MYAINT, Koichiro Watanabe, KOTARO YONEZU, RELATIONSHIP BETWEEN GRANITOID TYPES AND TIN MINERALIZATION: A REVIEW OF TERTIARY GRANITOIDS IN CENTRAL GRANITOID BELT, MYANMAR
, Proceedings of the International conference on geological engineering, JICA RC, 2013.12.
199. Adi Maulana, Koichiro Watanabe, KOTARO YONEZU, Akira Imai, Granitic magmatism in Sulawesi island, Indonesia; Implication for metallogenic province, Proceedings of the International conference on geological engineering, JICA RC, 2013.12.
200. L. SETIDJAJI, W. WARMADA, Koichiro Watanabe, KOTARO YONEZU, Progress on REE research in Indonesia 2008-2013, Proceedings of the International conference on geological engineering, JICA RC, 2013.12.
201. Adi Maulana, Koichiro Watanabe, KOTARO YONEZU, Akira Imai, Granitic magmatism and related ore deposit in Sulawesi, Indonesia, Proceedings of the International Symposium on Earth Science and Technology 2013, 108-111, 2013.12.
202. Huan Li, Koichiro Watanabe, KOTARO YONEZU, Sr-Nd-Hf isotope geochemistry of early Yanshanian granitoids in central Nanling region, south China: implication for magmatic evolution and tectonic environment, Proceedings of the International Symposium on Earth Science and Technology 2013, 112-119, 2013.12.
203. Jyunya Kanemitsu, KOTARO YONEZU, Koichiro Watanabe, Takushi Yokoyama, Characterization of LREE or Nd doped aluminosilicate gels by sol-gel method for preparing a calibration curve with high accuracy, Proceedings of the International Symposium on Earth Science and Technology 2013, 120-123, 2013.12.
204. A. HARIANT, S. Ikeda, M. F. Rosana, KOTARO YONEZU, Koichiro Watanabe, Takushi Yokoyama, Fluid temperature and textures of the Rorah Kadal vein in Cibaliung gold district, western Java, Indonesia, Proceedings of the International Symposium on Earth Science and Technology 2013, 280-283, 2013.12.
205. B. KUSUMASARI, N. HERDEANITA, KOTARO YONEZU, S. Taguchi, Koichiro Watanabe, Fluid geochemistry characteristics of Simbolan and Pusuk Bukit geothermal area in Toba caldera, North Sumatra Province, Indonesia, Proceedings of 35th New Zealand Geothermal Workshop, 2013.11.
206. T. Matsushita, KOTARO YONEZU, Yudzuru Inoue, Koichiro Watanabe, Takushi Yokoyama, Adsorption characteristics of Lithium adsorbent aimed at recovery of Lithium from geothermal fluid, Proceedings of 35th New Zealand Geothermal Workshop, 2013.11.
207. Masanori Yamamoto, A. Maulana, KOTARO YONEZU, Koichiro Watanabe, A. SUBEHAN, Copper - gold mineralization characteristics of the Sungai Mak depositin Gorontalo, northern Sulawesi, Indonesia, Proceedings of the 7th International Workshop and Conference on Earth Resources Technology, 2013.11.
208. Ryota Suzaki, K. Omar, K. MOKRANE, B. ABDELEHAK, S. Taguchi, KOTARO YONEZU, Koichiro Watanabe, Granite related mineralization of Tungsten in Hoggar, Southern Algeria, Proceedings of the 7th International Workshop and Conference on Earth Resources Technology, 2013.11.
209. R. Suzaki, K. OMAR, K. MOKRANE, B. ABDELEHAK, S. Taguchi, Koichiro Watanabe, KOTARO YONEZU, Sn-W Mineralization in Hoggar, southern part of Algeria, Proceedings of the 3rd Asia Africa Mineral Resources Conference 2013, 2013.09.
210. Huan Li, Koichiro Watanabe, KOTARO YONEZU, The Cooling History of the Early Yanshanian Composite Granitic Plutons in the Central Nanling Region, South China: Implications for the Mineralization Process and Tectonic Evolution, Proceedings of the 3rd Asia Africa Mineral Resources Conference 2013, 2013.09.
211. Z. BUDINOV, V. KOVACHEV, D. YOVCHEV, Koichiro Watanabe, KOTARO YONEZU, Petrology and Geochemistry of the Dyke Complex at Karavansalija Mineral Zone, Southwestern Serbia, Proceedings of the 3rd Asia Africa Mineral Resources Conference 2013, 2013.09.
212. R. A. Santos, R. N. Santos, KOTARO YONEZU, M. Matsuo, K. Shozugawa, Ma. B. JUMANGIT, Delineating Nickeliferous Laterite Horizons: Studies on Some Mineralogical Phases and its Environment of Formation, Proceedings of the 3rd Asia Africa Mineral Resources Conference 2013, 2013.09.
213. A. Z. MYINT, Koichiro Watanabe, KOTARO YONEZU, M. C. THU, Geological and Mineralogical Studies in Mawchi Sn-W Mine, Kayah State, Myanmar, Proceedings of the 3rd Asia Africa Mineral Resources Conference 2013, 2013.09.
214. K. Noda, KOTARO YONEZU, L. SETIDJAJI, Koichiro Watanabe, Geochemical behavior of REE into laterite, Western Kalimantan, Indonesia, Proceedings of the 3rd Asia Africa Mineral Resources Conference 2013, 2013.09.
215. A. HARIANT, Sakiko Ikeda, M. Rosana, KOTARO YONEZU, Koichiro Watanabe, Fluid Inclusion and Mineral Alteration of the Rorah Kadal Vein, At Cibaliung Gold Mine, Western Java, Indonesia, Proceedings of the 3rd Asia Africa Mineral Resources Conference 2013, 2013.09.
216. M. Yamamoto, A. Maulana, KOTARO YONEZU, Koichiro Watanabe, A. SUBEHAN, MINERALIZATION CHARACTERISTICS OF THE SUNGAI MAK DEPOSIT IN GORONTALO, NORTHEN SULAWESI, INDONESIA, Proceedings of the 3rd Asia Africa Mineral Resources Conference 2013, 2013.09.
217. Jyunya Kanemitsu, KOTARO YONEZU, Koichiro Watanabe, Takushi Yokoyama, Preparation of LREE doped aluminosilicate glass by sol-gel method for geochemical trace analysis, Proceedings of the 3rd Asia Africa Mineral Resources Conference 2013, 120-123, 2013.09.
218. Waleed Ibrahim, Koichiro Watanabe, M. E. IBRAHIM, KOTARO YONEZU, Detailed Geology and Mineralogy of Quartzite Bearing Base-Metal Sulfide Mineralization at Gabal Abu Houdeid Area South Eastern Desert Egypt, Proceedings of the 3rd Asia Africa Mineral Resources Conference 2013, 2013.09.
219. T. Tindell, Akira Imai, Ryohei Takahashi, A. J. Boyce, A. SCHERSTEN, L. PAGE, T. Ogata, KOTARO YONEZU, Koichiro Watanabe, Geochemical studies to constrain the relationship of the Kago low-sulfidation and Nansatsu high-sulfidation mineralisations, Proceedings of the 3rd Asia Africa Mineral Resources Conference 2013, 2013.09.
220. Sakiko Ikeda, M. Rosana, KOTARO YONEZU, A. HARIANT, Koichiro Watanabe, Gold Mineralization Characteristics of Cikoneng vein of the Cibaliung Gold Deposit in Western Java, Indonesia, Proceedings of the 3rd Asia Africa Mineral Resources Conference 2013, 2013.09.
221. Makoto Miyamoto, TETSUYA NAKANISHI, Ryohei Takahashi, Sachihiro Taguchi, KOTARO YONEZU, Koichiro Watanabe, S. Jargalan, Ore forming condition of orogenic gold deposit around the Yeroogol trend, northern Mongolia, Proceedings of the 3rdAsia Africa Mineral Resources Conference 2013, 2013.09.
222. Gaowa Naren, Akane Miyazaki, Motoyuki Matsuo, Shuqin Bai, Kotaro Yonezu, Yoshihiro Okaue, Takushi Yokoyama, A study on the interaction between ferric ion and silicic acid in hydrosphere
Si-containing ferruginous deposits formed in neutral hot spring waters, Acta Geochimica, 10.1007/s11631-013-0603-9, 32, 1, 27-34, 2013.03, [URL].
223. Akane Miyazaki, Mayumi Numata, Mayumi Etou, Kotaro Yonezu, Ioan Balint, Takushi Yokoyama, Evidence for tetrahedral AlO4 formation induced by Zn2+ adsorption onto Al(OH)3 gel, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 10.1016/j.colsurfa.2012.11.041, 420, 115-121, 2013.03, [URL].
224. Akira Imai, Kotaro Yonezu, Kenzo Sanematsu, Takashi Ikuno, Shingo Ishida, Koichiro Watanabe, Visut Pisutha-Arnond, Somchai Nakapadungrat, Jarupong Boosayasak, Rare Earth Elements in Hydrothermally Altered Granitic Rocks in the Ranong and Takua Pa Tin-Field, Southern Thailand, Resource Geology, 10.1111/j.1751-3928.2012.00212.x, 63, 1, 84-98, 2013.01, [URL].
225. Huan Li, Koichiro Watanabe, KOTARO YONEZU, Xiao-shuang Xi, Cheng-ming Wu, Sedimentary Fan” Model to the Zhaokalong Fe-Cu Deposit, Qinghai Province, China: Based On the Ore Body Characteristics, Proceedings of 1st Annual International Conference on Geological & Earth Sciences, 2012.12.
226. Chisato Masuda, KOTARO YONEZU, Koichiro Watanabe, Takushi Yokoyama, Recovery of Platinum from Spent Reforming Catalyst by Acid Leaching and Coprecipitation, International Symposium on Earth Science and Technology 2012, 2012.09.
227. Junya Kanemitsu, KOTARO YONEZU, K. Omar, B. Abdelhak, J. Boyce, Koichiro Watanabe, Iron Mineralization of Boukhadra and Ouenzadeposits in Tebessa, Northeast Algeria, International Symposium on Earth Science and Technology 2012, 2012.09.
228. Akihiro Yamashita, KOTARO YONEZU, Agung Harijoko, Koichiro Watanabe, Geochemical Study on Volcanic Rocks and Hydrothermal Fluid in Tampomas Volcano, West Java, Indonesia, International Symposium on Earth Science and Technology 2012, 2012.09.
229. Takuma Suga, Akira Imai, Ryohei Takahashi, Takahiro Tanaka, KOTARO YONEZU, Yoshinori Okaue, Koichiro Watanabe, Ore Minerals Characteristics of the Keisen No. 3-1 Vein in the Hishikari Mine, Southern Kyushu, Japan, International Symposium on Earth Science and Technology 2012, 2012.09.
230. Huan Li, Koichiro Watanabe, Xiao-shuang XI, KOTARO YONEZU, Geochemistry of Volcanic Rocks at Zhaokalong Iron-Copper-Polymetallic Ore Deposit, Qinghai Province, China: Implications for the Tectonic Background, International Symposium on Earth Science and Technology 2012, 2012.09.
231. Adi Maulana, Koichiro Watanabe, Akira Imai, KOTARO YONEZU, Origin of Magnetite and Ilmenite-Series Granitic Rocks in Sulawesi, Indonesia: Magma Genesis and Regional Metallogenic Constraint, International Symposium on Earth Science and Technology 2012, 2012.09.
232. Junya Kanemitsu, KOTARO YONEZU, K. Omar, B. Abdelhak, J. Boyce, Koichiro Watanabe, Mineralogical and Geochemical Investigation of Fe Deposit at Ouenza and Boukhadra, Northeast Algeria, Proceedings of the 2nd Asia Africa Mineral Resources Conference 2012, 2012.09.
233. Zhivko Budinov, Veselin Kovachev, Danail Yovchev, Koichiro Watanabe, KOTARO YONEZU, Preliminary Study of Alluvial Gold from the Catchment Area of Luda Kamchia River, Eastern Balkans, Proceedings of the 2nd Asia Africa Mineral Resources Conference 2012, 2012.09.
234. Waleed Ibrahim, Koichiro Watanabe, M. E. IBRAHIM, KOTARO YONEZU, Detailed Geology and Mineralogy of Quartzite Bearing Base-Metal Sulfide Mineralization at Gabal Abu Houdeid Area South Eastern Desert Egypt, Proceedings of the 2nd Asia Africa Mineral Resources Conference 2012, 2012.09.
235. Takuma Suga, Akira Imai, Ryohei Takahashi, Takahiro Tanaka, KOTARO YONEZU, Yoshinori Okaue, Laurence Page, Anders Schersten, Koichiro Watanabe, Gold Mineralization Characteristics of the Keisen No. 3-1 Vein, Sanjin Deposit, the Hishikari Epithermal Gold Deposit, Japan, Proceedings of the 2nd Asia Africa Mineral Resources Conference 2012, 2012.09.
236. Ratib Salehi, KOTARO YONEZU, Koichiro Watanabe, Lithium Potential of Afghanistan, Proceedings of the 2nd Asia Africa Mineral Resources Conference 2012, 2012.09.
237. Kenta Nakamura, KOTARO YONEZU, Kamar Shah ARIFFIN, Ryohei Takahashi, Koichiro Watanabe, Mineralization Study of Sg. Tarom and Lubuk Mandi Mine, terengganu State, Malaysia, Proceedings of the 2nd Asia Africa Mineral Resources Conference 2012, 2012.09.
238. Makoto Miyamoto, TETSUYA NAKANISHI, Ryohei Takahashi, Sachihiro Taguchi, KOTARO YONEZU, Koichiro Watanabe, S. Jargalan, Investigation of Gold Mineralization around Gatsuurt Gold Deposit, Northern Mongolia, Proceedings of the 2nd Asia Africa Mineral Resources Conference 2012, 2012.09.
239. Sakiko Ikeda, M. Rosana, KOTARO YONEZU, Koichiro Watanabe, Gold Mineralization Characteristics of the Cibaliung Gold Deposit in Western Java, Indonesia, Proceedings of the 2nd Asia Africa Mineral Resources Conference 2012, 2012.09.
240. Huan Li, Xiao-shuang, Koichiro Watanabe, Ze-feng Chen, Cheng-ming Wu, KOTARO YONEZU, Stratigraphy of Zhaokalong Fe-Cu Polymetallic Deposit at Qinghai Province, China: Tectonic Setting Instructions, Proceedings of the 2nd Asia Africa Mineral Resources Conference 2012, 2012.09.
241. Adi Maulana, KOTARO YONEZU, Koichiro Watanabe, Akira Imai, Insight into REE Investigation in Weathered Granitic Rocks from Sulawesi Island, Indonesia, Proceedings of the 2nd Asia Africa Mineral Resources Conference 2012, 2012.09.
242. Agus Didit Haryanto, M. Rosana, KOTARO YONEZU, Koichiro Watanabe, Petrology of Rorah Kadal Host Rock in Cibaliung West Java: The Effect of Hydrothermal Activity, Proceedings of the 2nd Asia Africa Mineral Resources Conference 2012, 2012.09.
243. Ryohei Takahashi, Koichiro Watanabe, Akira Imai, KOTARO YONEZU, Anders Schersten, Laurence Page, Timing of Ore Formation and Mineralization Characteristics of the Seisen Veins in the Hishikari Mine, Kagoshima, Japan, Proceedings of the 2nd Asia Africa Mineral Resources Conference 2012, 2012.09.
244. Tatsuya Shinkawa, KOTARO YONEZU, Koichiro Watanabe, M. El-Ahmady IBRAHIM, Mobility of Rare Earth Elements in Alkali Volcanic Rock-Derived Laterite at Wadi Natash, Egypt, Proceedings of the 2nd Asia Africa Mineral Resources Conference 2012, 2012.09.
245. KOTARO YONEZU, Masahiro Nishida, Koichiro Watanabe, Takushi Yokoyama, Adsorption Interaction between REE and Clay Minerals: Implication to the Formation of Ion-Adsorption REE Ore, Proceedings of the 2nd Asia Africa Mineral Resources Conference 2012, 2012.09.
246. Christopher Vehe SAGAPOA, Akira IMAI, Takeyuki OGATA, Kotaro YONEZU and Koichiro WATANABE, Lateritization Process of Peridotites in Siruka, Choiseul, Solomon Islands, Journal of Southeast Asian Applied Geology, 3, 2, 76-92, 2012.03.
247. Adi MAULANA, Koichiro WATANABE, Akira IMAI and Kotaro YONEZU, Petrology and Geochemistry of Granitic Rocks in South Sulawesi, Indonesia: Implication for Origin of Magma and Geodynamic Setting, International Journal of Civil and Geological Engineering, 6, 1-6, 2012.01.
248. Kenta NAKAMURA, Kotaro YONEZU, Kamar Shah ARIFFIN and Koichiro WATANABE, Study of Gold Mineralization from Sg. Tarom and Lubuk Mandi Mines, North Eastern Terengganu State, Malaysia, 1st Asia Africa Mineral Resources Conference 2011, 2011.12.
249. Takuma SUGA, S. NISHIMURA, Akira IMAI, Ryohei TAKAHASHI, Takahiro TANAKA Kotaro YONEZU, Y. OKAUE and Koichiro WATANABE, Ore-forming Condition of the Keisen No.3-1 Vein in the Hishikari Gold Deposit, Kagoshima, Japan, 1st Asia Africa Mineral Resources Conference 2011, 2011.12.
250. Tatsuya SHINKAWA, Kotaro YONEZU, Koichiro WATANABE and M. El-Ahmady IBRAHIM, Investigation of REE bearing Lateritic Layer in Sinai Peninsula and South Eastern Desert, Egypt, 1st Asia Africa Mineral Resources Conference 2011, 2011.12.
251. Adi MAULANA, Koichiro WATANABE, Akira IMAI and Kotaro YONEZU, Magnetic Susceptibility of Sulawesi Granitic Rocks, Indonesia: Implication for Regional Metallogenic Genesis, 1st Asia Africa Mineral Resources Conference 2011, 2011.12.
252. Jun MATSUDA, Koichiro WATANABE, Akira IMAI, I. W. Warmada, Kotaro YONEZU, S. SREYMEAN, I. INTHAVONGSA and Adrian J. BOYCE, Mineralization Environment of the Metamorphic Rock-hosted Au Prospect at Kebutuhjurang, Banjamegara Regency, Central Java, Indonesia, 1st Asia Africa Mineral Resources Conference 2011, 2011.12.
253. Tomohiro MATSUSHITA, Kotaro YONEZU, Hironori OHASHI, Takushi YOKOYAMA and Koichiro WATANABE, The Effect of Local Structure to the Adsorption Performance of Lithium Adsorbent, International Symposium on Earth Science and Technology 2011, 461-464, 2011.12.
254. Akihiro YAMASHITA, Kotaro YONEZU, Agung HARIJOKO and Koichiro WATANABE, Petrologic and Geochemical Investigation of Geothermal Manifestation Area around Tampomas Volcano, Weat Java, Indonesia, International Symposium on Earth Science and Technology 2011, 423-428, 2011.12.
255. Masahiro NISHIDA, Kotaro YONEZU, Koichiro WATANABE, Akira IMAI and Takushi YOKOYAMA, Adsorption Mode of REE on Clay Minerals and Their Desorption Behavior by Sequential Extraction, International Symposium on Earth Science and Technology 2011, 401-406, 2011.12.
256. Adi MAULANA, Koichiro WATANABE, Akira IMAI and Kotaro YONEZU, Geochemical Variation of Granitic Rocks in Sulawesi Island, Indonesia, International Symposium on Earth Science and Technology 2011, 379-388, 2011.12.
257. Christopher V SAGAPOA, Akira IMAI, Takeyuki OGATA, Kotaro YONEZU and Koichiro WATANABE, Petrology of Siruka Peridotites, Southeastern Choiseul, Solomon Islands, International Symposium on Earth Science and Technology 2011, 325-332, 2011.12.
258. Pornthip Parinayok, Mamiko Yamashita, Kotaro Yonezu, Hironori Ohashi, Koichiro Watanabe, Yoshihiro Okaue, Takushi Yokoyama, Interaction of Au(III) and Pt(IV) complex ions with Fe(II) ions as a scavenging and a reducing agent
A basic study on the recovery of Au and Pt by a chemical method, Journal of Colloid and Interface Science, 10.1016/j.jcis.2011.07.038, 364, 1, 272-275, 2011.12, [URL].
259. 米津幸太郎、横山拓史、渡邊公一郎, 有価金属の自然界における濃集機構に学ぶリサイクル―鉄・マンガンによる貴金属の濃集・分離の可能性―, 環境資源工学, 58, 2, 70-75, 2011.05.
260. Kotaro YONEZU, Takushi YOKOYAMA, Yuki SHIMADA, Yoshihiro OKAUE and Koichiro WATANABE, Concentration Mechanism of Rare Earth Elements in the Siliceous Deposits formed from Geothermal Water, Kyushu, Japan, 5th International Workshop and Conference on Earth Resources
Technology
, 20-23, 2011.05.
261. Adi MAULANA, Koichiro WATANABE, Akira IMAI and Kotaro YONEZU, Enrichment Rare Earth Elements (REE) Contents in Granitic Rock from South Sulawesi, Indonesia, 5th International Workshop and Conference on Earth Resources
Technology
, 33-39, 2011.05.
262. Kenta NAKAMURA, Ryohei TAKAHASHI, Kenzo SANEMATSU,Kamar Shah ARRIFIN, Kotaro YONEZU, Koichiro WATANABE, Characterization of Quartz Veins in Katok Batu and Pulai, South Kelantan, Malaysia, 5th International Workshop and Conference on Earth Resources
Technology
, 111-114, 2011.05.
263. S. A. IDRUS, S. PRAMUMIJOYO, I W. WARMADA, K. YONEZU and Akira IMAI, Characterisation and Leaching Behavior of Minerals by Sulphuric Acid in the Soroako Nickeliferous Laterite Ores, Sulawesi, Indonesia, International Symposium on Earth Science and Technology 2010, 421-425, 2010.12.
264. T. IKUNO, A. IMAI, K. YONEZU, K. SANEMATSU, L. D. SETIJADJI, K. SITHA, A. DIMARA, V. PISTHA‐ARNORD and S. NAKAPADUNGRAT, Concentration and Geochemical Behavior of REE in Hydrothermally-Altered and Weathered
Granitic Rocks in Southern Thailand and Bangka Island, Indonesia
, International Symposium on Earth Science and Technology 2010, 269-274, 2010.12.
265. M. NISHIDA, K. YONEZU, K. WATANABE, A. IMAI and T. YOKOYAMA, Effect of Electrolytes in Adsorption of REE on Kaolin Minerals, International Symposium on Earth Science and Technology 2010, 185-188, 2010.12.
266. Y. KAWABATA, K. YONEZU, K. WATANABE and T. YOKOYAMA, The Chemical State of Boron Incorporated into Magnesium Silicate and its Recycling, International Symposium on Earth Science and Technology 2010, 327-330, 2010.12.
267. Yuki Tohma, Akira Imai, Kenzo Sanematsu, Kotaro Yonezu, Ryohei Takahashi, Masaaki Koyama, Ryota Sekine, Robert Duncan, Koichiro Watanabe, Characteristics and mineralization age of the fukusen no. 1 vein, hishikari epithermal gold deposits, southern Kyushu, Japan, Resource Geology, 10.1111/j.1751-3928.2010.00140.x, 60, 4, 348-358, 2010.12, [URL].
268. Y. KAWABATA, K. YONEZU, K. WATANABE and T. YOKOYAMA, Silicic Acid Removal as Magnesium Silicate and Removal of Hazardous Elements from Synthetic Geothermal Water, 3rd Regional Conference on Geological Engineering Research in ASEAN, 162-165, 2010.11.
269. K. YONEZU, T. YOKOYAMA, Y. SHIMADA, Y. OKAUE and K. WATANABE, Uptake of Rare Earth Elements (REE) in the Silica Scales from Geothermal Water in Kyushu, Japan, 3rd Regional Conference on Geological Engineering Research in ASEAN, 54-60, 2010.11.
270. K. YONEZU, H. PIAO, T. YOKOYAMA, A. IMAI, K. WATANABE, Contributing to the Comprehensive Utilization of Geothermal Resources: Lithium Recovery at Geothermal Power Plant, 4th International Workshop and Conference on Earth Resources
Technology
, CD-ROM, 2010.05.
271. P. PARINAYOK, K. YONEZU, T. YOKOYAMA, K. WATANABE, Kinetics Study on Alumina Dissolution, 4th International Workshop and Conference on Earth Resources
Technology
, CD-ROM, 2010.05.
272. 島田雄樹、米津幸太郎、岡上吉広、渡邊公一郎、岩永達人、横山拓史, 地熱熱水から生成したシリカスケール中の希土類元素, 日本地熱学会誌, Vol.32, No.2, 77-86, 2010.04.
273. K. YONEZU, S. SAKOMOTO, K. Watanabe, A. IMAI, T. YOKOYAMA, REMOVAL OF SILICIC ACID AS CALCIUM SILICATE AND UPTAKE BEHAVIOR OF TRACE ELEMENTS, 4th International Symposium on Novel Carbon Resources Sciences, CD-ROM, 2009.12.
274. H. PIAO, K. YONEZU, Y. KAWABATA, K. WATANABE, A. IMAI, T. YOKOYAMA, RECOVERY OF LITHIUM FROM GEOTHERMAL WATER BY MANGANESE OXIDE ADSORBENT: APPROACH TO THE EFFECTIVE UTILIZATION OF GEOTHERMAL RESOURCES, 4th International Symposium on Novel Carbon Resources Sciences, CD-ROM, 2009.12.
275. K. YONEZU, T. YOKOYAMA, A. IMAI, K. WATANABE, Contents of rare earth elements of quartz veins in the Hishikari epithermal gold deposit: Preliminary investigation by laser ablation ICP-MS, International Symposium on Earth Science and Technology 2009, 125-128, 2009.12.
276. P. PARINAYOK, K. YONEZU, H. PIAO, T. YOKOYAMA, K. WATANABE, Preliminary Study on Platinum Recovery from Spent Reforming Catalysts, International Symposium on Earth Science and Technology 2009, 363-368, 2009.12.
277. Y. KAWABATA, K. YONEZU, K. WATANABE, A. IMAI, T. YOKOYAMA, Removal of Boron by Magnesium Silicate from Synthetic Geothermal Water, International Symposium on Earth Science and Technology 2009, 369-372, 2009.12.
278. K. YONEZU,T. YOKOYAMA, Y. OKAUE, A. IMAI, K. WATANABE, Characteristics of rare earth elements in quartz veins of the Hishikari epithermal gold deposit, Japan: Comparison between bulk and local analyses, 3rd International Workshop and Conference on Earth Resources Technology, 49-58, 2009.05.
279. P. PARINAYOK, K. YONEZU, T. YOKOYAMA, K. WATANABE, Characterization of Spent Platinum/Alumina Reforming Catalysts for Platinum Recovery, 3rd International Workshop and Conference on Earth Resources Technology, 218-223, 2009.05.
280. C. WIRASERANEE, K. YONEZU, T. YOKOYAMA, A. IMAI, K. WATANABE, Q. LEEPAWPANTH, D. WIWATTANADATE, Coprecipitation of Au(III) Complex Ions with Mn(II) Hydroxide as Gold Nanoparticles and Its Implication to Selective Recovery from Electronic Wastes, 3rd International Workshop and Conference on Earth Resources Technology, 224-231, 2009.05.
281. C. WIRASERANEE, K. YONEZU, T. YOKOYAMA, D. WIWATTANADATE, Q. LEEPAWPANTH, K. WATANABE, Recovery of precious metals from computer microprocessor by coprecipitation with manganese hydroxide, International Symposium on Earth Science and Technology 2008, 557-564, 2008.12.
282. K. YONEZU,T. SHIBAO, T. YOKOYAMA, Y. OKAUE, A. IMAI, K. WATANABE, Interaction between gold(I) complexes and the surface of metal sulfides(FeS2 and Ag2S), 2nd International Workshop and Conference on Earth Resources Technology, 131-138, 2008.04.
283. C. WIRASERANEE, K. YONEZU, T. YOKOYAMA, D. WIWATTANADATE, Q. LEEPAWPANTH, K. WATANABE, Selective recovery of gold and platinum by coprecipitation with manganese(II) hydroxide, 2nd International Workshop and Conference on Earth Resources Technology, 143-150, 2008.04.
284. P. PARINAYOK, K. YONEZU, T. YOKOYAMA, K. WATANABE, Q. LEEPAWPANTH, D. WIWATTANADATE, Recovery of platinum from spent automobile catalytic convertors, 2nd International Workshop and Conference on Earth Resources Technology, 36-41, 2008.04.
285. K. YONEZU,T. YOKOYAMA, Y. OKAUE, A. IMAI, K. WATANABE, Coprecipitation of Au(I) Complex Anions by Aluminum Hydroxide, 5th International Symposium on Earth Science and Technology, 309-316, 2007.12.
286. S. SAKOMOTO, K. YONEZU,T. YOKOYAMA, Y. OKAUE, A. IMAI, K. WATANABE, Uptake of boron and gold by calcium silicate hydrate (CSH): Application for effective utilization of geothermal energy at geothermal power plant and the recovery of rare metals from geothermal water, 5th International Symposium on Earth Science and Technology, 287-292, 2007.12.
287. P. PARINAYOK, K. YONEZU, T. YOKOYAMA, K. WATANABE, Q. LEEPAWPANTH, D. WIWATTANADATE, Coprecipitation of platinum with metal hydroxides as a preliminary experiment of platinum recovery process from automobile catalytic converter, 5th International Symposium on Earth Science and Technology, 369-376, 2007.12.
288. Kotaro Yonezu, Takushi Yokoyama, Yoshihiro Okaue, Akira Imai, Koichiro Watanabe, Concentration of gold(I) Thiosulfate complex ions on the surface of alumina gel and their change in chemical state
Preliminary experiment in the elucidation of the formation mechanism of epithermal gold deposits, Resource Geology, 10.1111/j.1751-3928.2007.00035.x, 57, 4, 400-408, 2007.12, [URL], In order to elucidate the formation mechanism of low-sulfidation epithermal gold deposit, the adsorption of [Au(S2 O3)2]3- (a model compound for gold(I) complex ion) on alumina gel (a model compound for the aluminum-bearing minerals) and change in chemical state of [Au(S2 O3)2]3- after adsorption on the surface of alumina gel were investigated as a basic model experiment. In the pH range from 4 to 6, the amount of [Au(S2 O3)2]3- adsorbed on alumina gel decreased with increasing pH and decreased drastically between pH 6 and 7, and then approached zero above pH 8 at 30°C. At 60°C, the amount of gold adsorbed above pH 7 was enhanced compared with that at 30°C. This adsorption tendency indicates that [Au(S2O3)2]3- is mainly adsorbed by electrostatic interaction between negative charges of [Au(S2O3)2]3- and positive charges of alumina gel because of its isoelectric point around pH 9. The chemical state of gold after adsorption of [Au(S2 O3)2]3- on alumina gel was examined using X-ray absorption near edge structure (XANES). The result showed that [Au(S2O3)2]3- was spontaneously reduced to elemental gold even in the absence of specific reducing agents after adsorption on alumina gel. This reduction reaction might occur by two steps: (i) disproportionation of the adsorbed [Au(S2O3)2]3- at the surface of alumina gel, and (ii) spontaneous reduction of the resulting gold(III) complex ions on the surface of alumina gel. The experimental results suggest that aluminum plays an important role in the concentration of gold(I) complex ions and subsequent reduction of gold during the formation of low-sulfidation epithermal gold deposits..
289. 北本慎一,米津幸太郎,大橋弘範、本村慶信、小林康浩、岡上吉広、宮崎あかね、渡邊公一郎、横山拓史, 水酸化鉄(III)共沈法による金(III)錯イオンの濃縮度自動還元-電子製品廃棄物からの金回収への適用-, Journal of MMIJ, Vol.123, No.8, 406-412, 2007.08.
290. K. YONEZU,T. YOKOYAMA, Y. MOTOMURA, A. IMAI, K. WATANABE, Study on the Determination of Trace Elements in Siliceous Deposit Formed from Hydrothermal Water by ICP-MS, International Workshop on Earth Resources Technology, 77-80, 2007.04.
291. S. SAKOMOTO, K. YONEZU,T. YOKOYAMA, Y. OKAUE, A. IMAI, K. WATANABE, Adsorption Behavior of Gold(I)-thiosulfate Comple Anions onto the Surface of Manganese Dioxide; Approach the Recovery of Gold from Geothermal Waters, International Workshop on Earth Resources Technology, 105-110, 2007.04.
292. P. PARINAYOK, K. YONEZU, T. YOKOYAMA, K. WATANABE, Q. LEEPAWPANTH, D. WIWATTANADATE, Characterization of Spent Automobile Catalytic converter for Platinum Recovery, International Workshop on Earth Resources Technology, 99-104, 2007.04.
293. K. YONEZU,S. HAYASHI, T. YOKOYAMA, Y. MOTOMURA, A. IMAI, K. WATANABE, Occurrence and distribution of gold in precipitates from the wellhead steam separator at Otake geothermal power plant, 4th international Workshop on Earth Science and Technology, 431-438, 2006.12.
294. S. SAKOMOTO, K. YONEZU,T. YOKOYAMA, Y. OKAUE, A. IMAI, K. WATANABE, Study on adsorption of Au(I) and Au(III) anions onto manganese dioxide for application to their recovery from geothermal water, 4th international Workshop on Earth Science and Technology, 307-312, 2006.12.
295. KOTARO YONEZU, Coprecipitation of Au(III) complex anions with hydrous iron(III) oxide and their spontaneous reduction: Application to recovery of gold from the wastes of electronic products, 4th International conference on gold science, technology and its applications, 2006.12.
296. K. YONEZU,T. YOKOYAMA, Y. OKAUE, A. IMAI, K. WATANABE, Relationship between the Ag/Au ratio in ore fluid and ore mineral in epithermal environment using Ag(I) and Au(I) adsorption experiment on alumina, 3rd International Symposium & Exhibition on Earth Resources and Geological Engineering Education, 388-395, 2006.08.
297. K. YONEZU,T. YOKOYAMA, Y. OKAUE, A. IMAI, K. WATANABE, Formation Mechanism of Low-Sulfidation Epithermal Gold-Silver Deposits; Adsorption Behavior of Gold(I) and Silver(I)-Thiosulfate Complex Anions on the Surface of Alumina and Silica Gels, 3rd international Workshop on Earth Science and Technology, 417-424, 2005.12.
298. R. CHAIRAKSA K. YONEZU, T. YOKOYAMA, A. IMAI, Q. LEEPAWPANTH,P. MEECHUMNA, K. WATANABE, Characterization of jewelry secondary slag and processing for recovery of precious metals, 3rd international Workshop on Earth Science and Technology, 467-474, 2005.12.
299. R. CHAIRAKSA K. YONEZU, T. YOKOYAMA, A. IMAI, Q. LEEPAWPANTH,P. MEECHUMNA, K. WATANABE, Recovery of Precious Metals from Jewelry Secondary Slag, 2nd international Symposium on Earth Resources Engineering and Geological Engineering Education, 124-132, 2005.12.
300. K. YONEZU,T. YOKOYAMA, Y. OKAUE, A. IMAI, K. WATANABE, Adsorption behavior of Au(I)-thiosulfate complex anions on the surface of alumina and silica gels: Approach to the formation mechanism of low-sulfidation epithermal gold deposits, 26th New Zealand Geothermal Workshop 2004, 36-39, 2004.12.

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