Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
Yasuhito Osanai Last modified date:2019.06.05

Professor / Division of Earth Sciences / Department of Environmental Changes / Faculty of Social and Cultural Studies


Papers
1. Nguyen Van Thinh, Akinori Ozaki, Yasuhito Osanai, Kiyoshi Kurosawa, Trace toxic elements in agricultural soil and sediment in the biggest estuarine area, northern Vietnam, Paddy and Water Environment, 10.1007/s10333-019-00697-3, 2019.01, Soil quality, especially its toxic elements content, plays an important part in clarifying the sustainability of an estuarine ecosystem. In this study, six toxic elements (As, Pb, Cd, Zn, Cr, Cu) in soils and sediments of the Ba Lat estuary, northern Vietnam, were assessed using the ICP-MS technique. Soil properties, such as major minerals, soil particles, organic carbon content, were also measured using an X-ray diffractometer (XRD) system and other common methods. The FE-EPMA technique was applied to explore the surface chemical properties of the soil and sediment particles. Detailed information about arsenic and heavy metal forms in the samples was analyzed by the sequential extraction method. Sixty-seven surface soil and sediment samples were collected. In addition, several soil and sediment cores (1 m of depth) were also taken from mangrove forests and paddy fields to evaluate their toxic element content. The chemical analyses have shown that the surface layers of the river sediment and mangrove forest soil contain accumulated As and heavy metals, which could have been transported from the upstream Red River. The average concentrations of heavy metals (Pb, Cd, Zn, Cr, Cu) did not exceed the allowable limit for agricultural soil; however, these elements tend to accumulate on the surface layer of the soil and sediment profiles. The spatial distribution of the toxic elements suggests that intensive human activities in the upstream Red River in recent decades were the cause of elevated levels of these toxic elements in the estuarine ecosystem of Ba Lat estuary..
2. Vuong Bui Thi Sinh, Osanai, Y., Nakano, N., Adachi, T., Kitano, I., Geochemistry and geochronology of zircon in pelitic gneisses from the Higo metamorphic terrane, Kyushu, Japan: constraints on timing of high-temperature metamorphism, Journal of Minaralogical and Petrological Sciences, https://doi.org/10.2465/jmps.181115, 114, 47-59, 2019.04.
3. Hiroi, Y., Hokada, T., Kato, M., Yanagi, A., Adachi, T., Osanai, Y., Motoyoshi, Y., Shiraishi, K., Felsite-nanogranite inclusions and three Al2O3 polymorphs in the same garnet in ultrahigh-temperature granulites from Rundvågshetta, Lützow-Holm Complex, East Antarctica, Journal of Minaralogical and Petrological Sciences, https://doi.org/10.2465/jmps.181118, 114, 60-78, 2019.04.
4. Ali Asghar Sepahi, Seyedeh Razieh Jafari, Yasuhito Osanai, Hossein Shahbazi, Mohssen Moazzen, Age, petrologic significance and provenance analysis of the Hamedan low-pressure migmatites; Sanandaj-Sirjan Zone, west Iran, International Geology Review, 10.1080/00206814.2018.1517392, 2018.01, Meta-pelitic rocks with interlayers of meta-psammites within the inner thermal aureole of the Alvand plutonic complex (Sanandaj-Sirjan Zone (SaSZ), western Iran) underwent partial melting; generating various types of migmatites. The mesosome of the Hamedan migmatites is classified into two groups: (1) cordierite-rich and A3l-silicate-poor mesosomes and (2) cordierite-poor, Al-silicate-rich groups. Leucosomes are also variable, ranging from plagioclase-rich to K-feldspar-rich leucosomes. Mineral-chemical studies and thermobarometric estimations indicate temperature and pressure of 640–700°C and 3–5 kbar, respectively, for the formation of mesosomes. U–Pb zircon geochronology on 214 grains from the mesosome of migmatites indicates ages of 160–180 Ma (ca ~170 Ma) for zircon metamorphic rims and variable ages of 190–2590 Ma for the inherited detrital zircon cores. Inherited core ages show various age populations, but age populations at 200–600 Ma are more frequent. The age populations of the detrital zircons clarify that the provenance of the younger zircon grains (200–500 Ma) was more likely the Iranian plate, whereas the older grains (600 Ma to >2.5 Ga) may be sourced from both northern Gondwana (such as Arabian-Nubian Shield) and the neighbouring, old cratons like as Africa. We suggest that magmatic activities, especially mafic plutonism at ~167 Ma, are the main triggers for the heat source of metamorphism, partial melting, and migmatization. In contrast to a presumed idea for a Cretaceous regional metamorphic event in the NW parts of the SaSZ, this study attests that the metamorphism should be older and can be associated with Jurassic magmatic pulses..
5. Vuong Bui Thi Sinh, Yasuhito Osanai, Christoph Lenz, Nobuhiko Nakano, Tatsuro Adachi, Elena Belousova, Ippei Kitano, Gem-quality zircon megacrysts from placer deposits in the central highlands, Vietnam—potential source and links to cenozoic alkali basalts, Minerals, 10.3390/min9020089, 9, 2, 2019.01, Gem-quality zircon megacrysts occur in placer deposits in the Central Highlands, Vietnam, and have euhedral to anhedral crystal shapes with dimensions of ~3 cm in length. These zircons have primary inclusions of calcite, olivine, and corundum. Secondary quartz, baddeleyite, hematite, and CO
2
fluid inclusions were found in close proximity to cracks and tubular channels. LA-ICP-MS U-Pb ages of analyzed zircon samples yielded two age populations of ca. 1.0 Ma and ca. 6.5 Ma, that were consistent with the ages of alkali basalt eruptions in the Central Highlands at Buon Ma Thuot (5.80–1.67 Ma), Pleiku (4.30–0.80 Ma), and Xuan Loc (0.83–0.44 Ma). The zircon geochemical signatures and primary inclusions suggested a genesis from carbonatite-dominant melts as a result of partial melting of a metasomatized lithospheric mantle source, but not from the host alkali basalt. Chondrite-normalized rare earth element patterns showed a pronounced positive Ce, but negligible Eu anomalies. Detailed hyperspectral Dy
3+
photoluminescence images of zircon megacrysts revealed resorption and re-growth processes..
6. Ejima, T., Osanai, Y., Akasaka, M., Adachi, T., Nakano, N., Kon, Y., Ohfuji, H., Jargalan, S., Oxidation States of Fe in Constituent Minerals of a Spinel Lherzolite Xenolith from the Tariat Depression, Mongolia: The Significance of Fe3+ in Olivine, Minerals, 10.3390/ min8050204, 8, 204-221, 2018.12.
7. Nguyen Van Thinh, Yasuhito Osanai, Tatsuro Adachi, Phong K. Thai, Nobuhiko Nakano, Akinori Ozaki, Yoshihiro Kuwahara, Ryosuke Kato, Masato Makio, Kiyoshi Kurosawa, Chemical speciation and bioavailability concentration of arsenic and heavy metals in sediment and soil cores in estuarine ecosystem, Vietnam, Microchemical Journal, 10.1016/j.microc.2018.03.005, 139, 268-277, 2018.06, The first investigation of arsenic (As) contamination in soil cores in the biggest estuarine ecosystem in northern Vietnam was conducted using FE-EPMA, ICP-MS and XRD techniques. Concentrations of arsenic and five heavy metals were measured and mineralogical characteristic of soils and sediments in different land uses were analyzed. Most of the soils contained high proportions of As and heavy metals in the potential mobility fractions and silicate minerals. High concentrations of As and heavy metals were observed in river sediments and top-layers of mangrove forest soil cores. Qualitative analyses using WDS technique on FE-EPMA found As on the iron (hydro)oxides and framboidal pyrite surfaces in the samples. The principal component analysis indicated the enrichment of As and heavy metals in the upper soil layers, suggesting that intensive human activities in upstream of the Red river in recent decades could be the cause of elevated levels of these toxic elements in the estuarine ecosystem..
8. Ippei Kitano, Yasuhito Osanai, Nobuhiko Nakano, Tatsuro Adachi, Ian C.W. Fitzsimons, Detrital zircon and igneous protolith ages of high-grade metamorphic rocks in the Highland and Wanni Complexes, Sri Lanka
Their geochronological correlation with southern India and East Antarctica, Journal of Asian Earth Sciences, 10.1016/j.jseaes.2018.01.017, 156, 122-144, 2018.05, The high-grade metamorphic rocks of Sri Lanka place valuable constraints on the assembly of central parts of the Gondwana supercontinent. They are subdivided into the Wanni Complex (WC), Highland Complex (HC) and Vijayan Complex (VC), but their correlation with neighbouring Gondwana terranes is hindered by a poor understanding of the contact between the HC and WC. Laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) U–Pb dating of remnant zircon cores from 45 high-grade metamorphic rocks in Sri Lanka reveals two domains with different age characteristics that correlate with the HC and WC and which help constrain the location of the boundary between them. The HC is dominated by detrital zircon ages of ca. 3500–1500 Ma from garnet–biotite gneiss, garnet–cordierite–biotite gneiss, some samples of garnet–orthopyroxene–biotite gneiss and siliceous gneiss (interpreted as paragneisses) and igneous protolith ages of ca. 2000–1800 Ma from garnet–hornblende–biotite gneiss, other samples of garnet–orthopyroxene–biotite gneiss, garnet–two-pyroxene granulite, two-pyroxene granulite and charnockite (interpreted as orthogneisses). In contrast, the WC is dominated by detrital zircon ages of ca. 1100–700 Ma from paragneisses and igneous protolith ages of ca. 1100–800 Ma from orthogneisses. This clearly suggests the HC and WC have different origins, but some of our results and previous data indicate their spatial distribution does not correspond exactly to the unit boundary proposed in earlier studies using Nd model ages. Detrital zircon and igneous protolith ages in the HC suggest that sedimentary protoliths were eroded from local 2000–1800 Ma igneous rocks and an older Paleoproterozoic to Archean craton. In contrast, the WC sedimentary protoliths were mainly eroded from local late Mesoproterozoic to Neoproterozoic igneous rocks with very minor components from an older 2500–1500 Ma craton, and in the case of the WC precursor sediments there was possibly additional detritus derived from early to middle Neoproterozoic metamorphic rocks. The relic zircon core ages in the HC are comparable with those of the Trivandrum Block and Nagercoil Block of southern India. In contrast, those ages in the WC match the Achankovil Shear Zone and Southern Madurai Block of southern India. These comparisons are also supported by Th/U ratios of detrital zircon cores from paragneisses (Th/U ratios of >0.10 for the former and not only >0.10 but also ≤0.10 for the latter). Comparisons with the Lützow-Holm Complex of East Antarctica indicate that the geochronological characteristics of the HC and WC broadly match those of the Skallen Group, and the Ongul and Okuiwa Groups, respectively..
9. Nakano, N., Osanai, Y., Nguyen Van Nam, Tran Van Tri, Bauxite to eclogite: Evidence for late Permian supracontinental subduction at the Red River shear zone, northern Vietnam, Lithos, doi.org/10.1016/j.lithos.2017.12.023, 302-303, 37-49, 2018.01.
10. Thinh Nguyen Van, Yasuhito Osanai, Hai Do Nguyen, Kiyoshi Kurosawa, Arsenic speciation and extraction and the significance of biodegradable acid on arsenic removal—an approach for remediation of arsenic-contaminated soil, International Journal of Environmental Research and Public Health, 10.3390/ijerph14090990, 14, 9, 2017.09, A series of arsenic remediation tests were conducted using a washing method with biodegradable organic acids, including oxalic, citric and ascorbic acids. Approximately 80% of the arsenic in one sample was removed under the effect of the ascorbic and oxalic acid combination, which was roughly twice higher than the effectiveness of the ascorbic and citric acid combination under the same conditions. The soils treated using biodegradable acids had low remaining concentrations of arsenic that are primarily contained in the crystalline iron oxides and organic matter fractions. The close correlation between extracted arsenic and extracted iron/aluminum suggested that arsenic was removed via the dissolution of Fe/Al oxides in soils. The fractionation of arsenic in four contaminated soils was investigated using a modified sequential extraction method. Regarding fractionation, we found that most of the soil contained high proportions of arsenic (As) in exchangeable fractions with phosphorus, amorphous oxides, and crystalline iron oxides, while a small amount of the arsenic fraction was organic matter-bound. This study indicated that biodegradable organic acids can be considered as a means for arsenic-contaminated soil remediation..
11. P. L. Dharmapriya, Sanjeewa P.K. Malaviarachchi, Leo M. Kriegsman, K. Sajeev, Andrea Galli, Yasuhito Osanai, N. D. Subasinghe, C. B. Dissanayake, Distinct metamorphic evolution of alternating silica-saturated and silica-deficient microdomains within garnet in ultrahigh-temperature granulites
An example from Sri Lanka, Geoscience Frontiers, 10.1016/j.gsf.2016.11.008, 8, 5, 1115-1133, 2017.09, Here we report the occurrence of garnet porphyroblasts that have overgrown alternating silica-saturated and silica deficient microdomains via different mineral reactions. The samples were collected from ultrahigh-temperature (UHT) metapelites in the Highland Complex, Sri Lanka. In some of the metapelites, garnet crystals have cores formed via a dehydration reaction, which had taken place at silica-saturated microdomains and mantle to rim areas formed via a dehydration reaction at silica-deficient microdomains. In contrast, some other garnets in the same rock cores had formed via a dehydration reaction which occurred at silica-deficient microdomains while mantle to rim areas formed via a dehydration reaction at silica-saturated microdomains. Based on the textural observations, we conclude that the studied garnets have grown across different effective bulk compositional microdomains during the prograde evolution. These microdomains could represent heterogeneous compositional layers (paleobedding/laminations) in the precursor sediments or differentiated crenulation cleavages that existed during prograde metamorphism. UHT metamorphism associated with strong ductile deformation, metamorphic differentiation and crystallization of locally produced melt may have obliterated the evidence for such microdomains in the matrix. The lack of significant compositional zoning in garnet probably due to self-diffusion during UHT metamorphism had left mineral inclusions as the sole evidence for earlier microdomains with contrasting chemistry..
12. Setiawan, N.I., Yasuhito Osanai, Nobuhiko Nakano, Tatsuro Adachi, Kazuhiro Yonemura, Aya Yoshimoto, Prograde and retrograde evolution of eclogites from the Bantimala Complex in South Sulawesi, Indonesia, Journal of Minaralogical and Petrological Sciences, 10.2465/jmps.150907, 111, 3, 211-225, 2016.06.
13. Nobuhiko Nakano, Yasuhito Osanai, Nam, N.V., Tran Van Tri, Low–temperature eclogite–facies bauxite from the Red River shear zone in Vietnam: Its evolution and significance, Journal of Minaralogical and Petrological Sciences, doi: 10.2465/jmps.150727, 111, 196-210, 2016.08.
14. Masaaki Owada, Yasuhito Osanai, Nobuhiko Nakano, Tatsuro Adachi, Ippei Kitano, Tran Van Tri, Hiroo Kagami, Late Permian plume–related magmatism and tectonothermal events in the Kontum Massif, central Vietnam, Journal of Minaralogical and Petrological Sciences, doi: 10.2465/jmps.151019b, 111, 181-195, 2016.08.
15. Otsuji, N., Satish-Kumar, M., Kamei, A., Takazawa, E., Tsuchiya, N., Grantham, G.H.,, Kawakami, T., Ishikawa, M., Yasuhito Osanai, Sr and Nd Isotopic evidence in metacarbonate rocks for an extinct Island arc–ocean system in East Antarctica, Journal of Minaralogical and Petrological Sciences, doi: 10.2465/jmps.151029a, 111, 170-180, 2016.08.
16. Yasuhito Osanai, Krishnan Sajeev, Nobuhiko Nakano, Ippei Kitano, Wilbert K.V. Kehelpannala, Ryosuke Kato, Tatsuro Adachi, Sanjeewa P.K. Malaviarachchi, UHT granulites of the Highland Complex, Sri Lanka II
Geochronological constraints and implications for Gondwana correlation, Journal of Mineralogical and Petrological Sciences, 10.2465/jmps.151230, 111, 3, 157-169, 2016.07, The regional ultrahigh-temperature (UHT) metamorphism of the Highland Complex, Sri Lanka is well established and has an important role in our understanding of the tectonic history of the Gondwana supercontinent. U-Pb zircon dating of sapphirine-bearing Mg-Al granulites yielded two major metamorphic age populations at approximately 620-590 and 563-525 Ma with no evidence of older zircon cores. Pelitic granulite samples with a Grt-Sil-Spl-Crd assemblage have similar metamorphic ages with concordant data clusters at ~ 602, 563, and 526 Ma and inherited zircon cores aged from 2040 to 1600 Ma. The pelitic granulites also underwent two stages of metamorphism (565-520 and 622-580 Ma). Some of these pelitic granulite samples have inherited zircon cores ranging from 3060 to 760 Ma. Zircons in mafic granulite samples have age ranges of 566-533 and 620-578 Ma. A calc-silicate granulite sample also has similar age populations at 591, 541, and 524 Ma. Combining these new results with previously published ages from Sri Lanka and formerly adjacent continental fragments of Gondwana, we propose that the terranes in southern Madagascar (south of Ranotsara Shear Zone), Northern and Southern Madurai and the Trivandrum Blocks of southern India, the Highland Complex of Sri Lanka, and the Skallen Group in the Lützow-Holm Complex of East Antarctica represent a unique metamorphic belt that regionally experienced the Ediacaran-Cambrian UHT event during the amalgamation of the Gondwana supercontinent..
17. Yasuhito Osanai, Krishnan Sajeev, Nobuhiko Nakano, Ippei Kitano, Wilbert K.V. Kehelpannala, Ryosuke Kato, Tatsuro Adachi, Sanjeewa P.K. Malaviarachchi, UHT granulites of the Highland Complex, Sri Lanka I
Geological and petrological background, Journal of Mineralogical and Petrological Sciences, 10.2465/jmps.151227, 111, 3, 145-156, 2016.07, The ultrahigh-temperature (UHT) regional metamorphism of Sri Lanka has a significant role in understanding the tectonics and formation of the Gondwana supercontinent. Sri Lanka is specifically important because of its central position in Gondwana, located between southern India, Madagascar and eastern Antarctica. In particular, the Highland Complex has been the focus of several previous studies because of the prominence of metasedimentary rocks that experienced UHT metamorphism. The central Highland Complex of Sri Lanka consists of Spr-bearing Mg-Al rich granulites intercalated with other pelitic, mafic granulites and calc-silicates, which preserve several textural evidences for UHT metamorphism. The calculated peak metamorphic conditions for the Mg-Al rich granulite yielded a temperature range from 910 to 1005 °C at 1.0 GPa, and the pressure varies between 0.9 to 1.2 GPa. The estimated metamorphic P-T conditions and evolution path is in good agreement with previous studies and also to that of similar rock-types from southern Madagascar, southern India and East Antarctica..
18. Ippei Kitano, Yasuhito Osanai, Nobuhiko Nakano, Tatsuro Adachi, Detrital zircon provenances for metamorphic rocks from southern Sør Rondane Mountains, East Antarctica: A new report of Archean to Mesoproterozoic zircons, Journal of Minaralogical and Petrological Sciences, doi: 10.2465/jmps.151001, 111, 118-128, 2016.06.
19. Nobuhiko Nakano, Yasuhito Osanai, Masaaki Owada, Satish-Lumar, M., Tatsuro Adachi, Jargalan Sereenen, Aya Yoshimoto, Syeryekhan, K., Boldbaatar, C., Multiple growth of garnet, sillimanite/kyanite and monazite during amphibolite facies metamorphism: implications for the P-T-t and tectonic evolutionof the western Altai Range, Mongolia, Journal of Metamorphic Geology, doi: 10.1111/jmg.12154, 33, 937-958, 2015.12.
20. Toshisuke Kawasaki, Yasuhito Osanai, Experimental evidence of bulk chemistry constraint on SiO2 solubility in clinopyroxene at high-pressure conditions, Lithos, http://dx.doi.org/10.1016/j.lithos.2015.01.025, 206, 4-16, 2015.04.
21. Makoto Sato, Kenji Shuto, Rikako Nohara^Imanaka, Eiichi Takazawa, Yasuhito Osanai, Nobuhiko Nakano, Repeated magmatism at 34 Ma and 23-20 Ma producing high magnesian adakitic andesites and transitional basalts on southern Okushiri Island, NE Japan arc, Lithos, http://dx.doi.org/10.1016/j.lithos.2014.06.008, 205, 60-83, 2014.10.
22. Tetsuo Kawakami, Nobuhiko Nakano, Fumiko Higashino, Tomokazu Hokada, Yasuhito Osanai, Masaki Yuhara, Punya Charusiri, Hiroshi Kamikubo, Kazuhiro Yonemura, Takeshi Hirata, U-Pb zircon and CHIME monazite dating of granitoids and high-grade metamorphic rocks from the Eastern and Peninsular Thailand - A new report of Early Paleozoic granite, Lithos, doi: 10.1016/j.lithos.2014.04.012, 200, 64-79, 2014.05.
23. Nobuhiko Nakano, Yasuhito Osanai, M. Satish-Kumar, Tatsuro Adachi, Masaaki Owada, Sereenen Jargalan, Ch. Boldbaatar, Aya Yoshimoto, Kundiz Syeryekhan, Paleozoic subduction– accretion–closure histories of the Paleo-Asian Ocean: Evidence from pressure– temperature–time–protolith evolution of high-Mg and -Al gneisses in the Altai Mountains, Mongolia, Journal of Geology, DOI: 10.1086/675665, 122, in press, 2014.05.
24. Yoshikuni Hiroi, Ayahiko Yanagi, Mutsumi Kato, Tomoyuki Kobayashi, Bernard Prame, Tomokazu Hokada, M. Satish-Kumar, Masahiro Ishikawa, Tatsuro Adachi, Yasuhito Osanai, Yoichi Motoyoshi, Kazuyuki Shiraishi, Supercooled melt inclusions in lower-crustal granulites as a consequence of rapid exhumation by channel flow, Gondwana Research, doi:10.1016/j.gr.2013.04.001, 25, 226-234, 2014.01.
25. Nobutaka Tsuchiya, Tomoyuki Shibata, Masako Yoshikawa, Yoshiko Adachi, Sumio Miyashita, Tatsuro Adachi, Nobuhiko Nakano, Yasuhito Osanai, Petrology of Lasail plutonic complex, northern Oman ophiolite, Oman: An example of arc-like magmatism associated with ophiolite detachment, Lithos, doi.org/10.1016/j.lithos.2012.10.013, 156-159, 120-138, 2013.12.
26. Kenji Shuto, Makoto Sato, Hiroshi Kawabata, Yasuhito Osanai, Nobuhiko Nakano, Ryuichi Yashima, Petrogenesis of middle Miocene primitive basalt, andesite and garnet-bearing adakitic rhyodacite from the Ryozen Formation: Implications for the Tectono-magmatic evolution of the NE Japana Arc, Journal of Petrology, doi:10.1093/petrology/egt052, 54, 2413-2454, 2013.12.
27. Nobuhiko Nakano, Yasuhito Osanai, Masaaki Owada, Tran Ngoc Nam, Punya Charusiri, K. Khamphavong, Tectonic evolution of high-grade metamorphic terranes in central Vietnam: Constraints from large-scale monazite geochronology, Journal of Asian Earth Sciences, doi.org/10.1016/j.jseaes.2013.05.010, 73, 520-539, 2013.12.
28. Toshisuke Kawasaki, Tatsuro Adachi, Nobuhiko Nakano, Yasuhito Osanai, Armalcolite pseudomorph in garnet-sillimanite gneiss from Skallevikshalsen, Lützow-Holm Complex, East Antarctica: Implication for ultrahigh-temperature metamorphism, Geological Society of London, Special Publication, doi.org/10.1144/ SP383.2, 383, 135-167, 2013.12.
29. Tatsuro Adachi, Tomokazu Hokada, Yasuhito Osanai, Nobuhiko Nakano, Sotaro Baba, Tsuyoshi Toyoshima, Contrasting metamorphic records and their implications for tectonic process in the central Sør Rondane Mountains, eastern Dronning Maud Land, East Antarctica, Geological Society of London, Special Publication, 383, 113-133, 2013.12.
30. Sotaro Baba, Yasuhito Osanai, Nobuhiko Nakano, Tomokazu Hokada, Kenji Horie, Tatsuro Adachi, Tsuyoshi Toyoshima, Counterclockwise P–T path and isobaric cooling of metapelites in Brattnipene, Sør Rondane Mountains, East Antarctica: implications for a tectonothermal event at the proto-Gondwana margin, Precambrian Research, 234, 210-228, 2013.09.
31. Tomokazu Hokada, Kenji Horie, Tatsuro Adachi, Yasuhito Osanai, Nobuhiko Nakano, Sotaro Baba, Tsuyoshi Toyoshima, Unraveling metamorphic and fluid records in Neoptroterozoic crossing orogens: U-Th-Pb and REE constraints from Sør Rondane Mountains, East Antarctica, Precambrian Research, 234, 183-209, 2013.09.
32. Nobuhiko Nakano, Yasuhito Osanai, Atsushi Kamei, M. Satish-Kumar, Tatsuro Adachi, Tomokazu Hokada, Sotaro Baba, Tsuyoshi Toyoshima, Multiple thermal events recorded in metamorphosed carbonate and associated rocks from the southern Austkampane region in the Sør Rondane Mountains, East Antarctica: A protracted Neoproterozoic history at the Gondwana suture zone, Precambrian Research, 234, 161-182, 2013.09.
33. Tatsuro Adachi, Yasuhito Osanai, Tomokazu Hokada, Nobuhiko Nakano, Sotaro Baba, Tsuyoshi Toyoshima, Timing of metamorphism in the central Sør Rondane Mountains, eastern Dronning Maud Land, East Antarctica: constrains from SHRIMP zircon dating and EPMA monazite dating, Precambrian Research, 234, 136-160, 2013.09.
34. Masaaki Owada, Atsushi Kamei, Kenji Horie, Toshiaki Shimura, Masaki Yuhara, Kazuhiro Tsukada, Yasuhito Osanai, Sotaro Baba, Magmatic history and evolution of continental lithosphere of the Sør Rondane Mountains, eastern Dronning Maud Land, East Antarctica, Precambrian Research, 234, 63-84, 2013.09.
35. Atsushi Kamei, Kenji Horie, Masaaki Owada, Masaki Yuhara, Nobuhiko Nakano, Yasuhito Osanai, Tatsuro Adachi, Late Proterozoic juvenile arc meta-tonalite and adakitic intrusions in the Sør Rondane Mountains, eastern Dronning Maud Land, Antarctica, Precambrian Research, 234, 47-62, 2013.09.
36. Tsuyoshi Toyoshima, Yasuhito Osanai, Sotaro Baba, Tmokazu Hokada, Nobuhiko Nakano, Tatsuro Adachi, M. Otsubo, Masahiro Ishikawa, Yoshifumi Nogi, Sinistral transpressional and extensional tectonics in Dronning Maud Land, East Antarctica, including the Sør Rondane Mountains, Precambrian Research, 234, 30-46, 2013.09.
37. Yasuhito Osanai, Yoshifumi Nogi, Sotaro Baba, Nobuhiko Nakano, Tatsuro Adachi, Tomokazu Hokada, Tsuyoshi Toyoshima, Masaaki Owada, M. Satish-Kumar, Atsushi Kamei, Ippei Kitano, Geologic evolution of the Sør Rondane Mountains, East Antarctica: Collision tectonics proposed based on metamorphic processes and magnetic anomalies, Precambrian Research, 234, 8-29, 2013.09.
38. M. Satish-Kumar, Tomokazu Hokada, Masaaki Owada, Yasuhito Osanai, Kazuyuki Shiraishi, Neoproterozoic orogens amalgamating East Gondwana: Did they cross each other?, Precambrian Research, 234, 1-7, 2013.09.
39. Kazuhiro Yonemura, Yasuhito Osanai, Nobuhiko Nakano, Tatsuro Adachi, Punya Charusiri, Zaw T. Nain, U-Th-Pb monazite dating of metamorphic rocks from the Mogok metamorphic belt, central Myanmar, Journal of Mineralogical and Petrological Sciences, doi: 10.2465/jmps.121019a, 108, 3, 184-188, 2013.07.
40. Aya Yoshimoto, Yasuhito Osanai, Nobuhiko Nakano, Tatsuro Adachi, Kazuhiro Yonemura, Hideo Ishizuka, U-Pb detrital zircon dating of pelitic schists and quartzite from the Kurosegawa Tectonic Zone, Southwest Japan, Journal of Mineralogical and Petrological Sciences, doi: 10.2465/jmps.121022a, 108, 3, 178-183, 2013.07.
41. Kazuhiro Yonemura, Yasuhito Osanai, Nobuhiko Nakano, Masaaki Owada, Sotaro Baba, Petrology, geochemistry, and origin of metamorphosed mafic rocks of the Trans Vietnam Orogenic Belt, Southeast Asia, Journal of Mineralogical and Petrological Sciences, 108, 55-86, 2013.04.
42. Masaaki Owada, Yasuhito Osanai, Nobuhiko Nakano, Tatsuro Adachi, Kazuhiro Yonemura, Aya Yoshimoto, K. Satish-Kumar, Jargalan Sereenen, Ch. Boldbaatar, An early Paleozoic tectonothermal event in western Mongolia: Implications for regional extension of the Cambrian orogenic belt, Journal of Mineralogical and Petrological Sciences, 108, 42-46, 2013.01.
43. Nugroho Imam Setiawan, Yasuhito Osanai, Nobuhiko Nakano, Tatsuro Adachi, Kazuhiro Yonemura, Aya Yoshimoto, J. Wahyudiono, K. Mamma, An overview of metamorphic rocks from central Indonesia: Importance of South Sulawesi, Central Java and South-West Kalimantan metamorphic terranes, Bulletin of Graduate School of Social and Cultural Studies, 19, 39-55, 2013.01.
44. Tatsuro Adachi, Yasuhito Osanai, Nobuhiko Nakano, Masaaki Owada, LA-ICP-MS U-Pb zircon and FE-EPMA U-Th-Pb monazite datings on pelitic granulites from the Mt. Ukidake area, Sefuri Mountains, northern Kyushu, Jour. Geol Soc. Japan, 118, 1, 39-52, 2012.01.
45. Nobuhiko Nakano, Yasuhito Osanai, Sotaro Baba, Tatsuro Adachi, Tomokazu Hokada, Tsuyoshi Toyoshima, Inferred ultrahigh-temperature metamorphism of amphibolitized olivine granulite from the Sør Rondane Mountains, East Antarctica, Polar Science, 10.1016/j.polar.2011.03.005, 2011.07.
46. Toshisuke Kawasaki, Nobuhiko Nakano, Yasuhito Osanai, Osumilite and a spinel+quartz association in garnet-sillimanite gneiss from Rundvagshetta, Lützow-Holm Complex, Easr Antarctica., Gondwan Research, 19, 430-445, 2011.01.
47. Nobuhiko Nakano, Yasuhito Osanai, Tatsuro Adachi, Major and trace element zoning of euhedral garnet in high-grade (>900°C) mafic granulite from the Song Ma Suture zone, northern Vietnam., Jour. Mineral. Petrol. Sci., 105, 268-273, 2010.12.
48. Nobuhiko Nakano, Yasuhito Osanai, Jargalan Sereenen, Chidmam Boldbaatar, M. Satish-Kumar, Masaaki Owada, Aya Yoshimoto, Metamorphic rocks from the Mongol-Altai: a first report of Japan-Mongolia Joint Geological Research (2009-2013)., Jour. Geol. Soc. Japan, 116, XI-XII, 2010.11.
49. Nakano, N., Osanai, Y., Jargalan, S., Boldbaatar, C., Satish-Kumar, M., Owada, M. and Yoshimoto, A., Metamorphic rocks from the Mongol-Altai: a first report of Japan-Mongolia Joint Geological Research (2009-2013)., Jour. Geol. Soc. Japan, 116, 2010.11.
50. Sajeev Krishnan, Ian S. Williams, Yasuhito Osanai, SHRIMP U-Pb dating of prograde and retrograde UHT metamorphism as exemplified by Sri Lankan granulites, Geology, 38, 971-974, 2010.10.
51. M. Satish-Kumar, J. Hermann, Tomoharu Miyamoto, Yasuhito Osanai, Fingerprinting a multistage metamorphic fluid-rock history: Evidence from grain scale Sr, O and C isotopic and trace element variations in high-grade marbles from East Antarctica, Lithos, 114, 217-228, 2010.05.
52. Tatsuro Adachi, Tomokazu Hokada, Yasuhito Osanai, Tsuyoshi Toyoshima, Sotaro Baba, Nobuhiko Nakano, Titanium behavior in quartz during retrograde hydration: Occurrence of rutile exsolution and implications for metamorphic processes in the Sør Rondane Mountains, East Antarctica. , Polar Science, 3, 222-234, 2010.02.
53. Nobuhiko Nakano, Yasuhito Osanai, Sajeev Krishnan, Yasutaka Hayasaka, Tomoharu Miyamoto, Minh Thi Nguyen, Masaaki Owada, Brian Windley, Triassic eclogite from northern Vietnam: inferences and geological significance. , Jour. Metamorphic Geol., 28, 59-76, 2010.01.
54. Sajeev Krishnan, Yasuhito Osanai, Y. Kon, Tetsumaru Itaya, Stability of pargasite during ultrahigh-temperature metamorphism: A consequence of titanium and REE partitioning? , American Minaralogist, 94, 535-545, 2009.06.
55. Nobuhiko Nakano, Yasuhito Osanai, Masaaki Owada, Yasutaka Hayasaka, Tran Ngoc Nam, Permo-Triassic Barrovian metamorphism in the Kontum Massif, central Vietnam: constraints on continental collision tectonics in Southeast Asia, Island Arc, 18, 126-143., 2009.01.
56. Tsunogae, T., Santosh, M., Dubessy, J., Osanai, Y., Owada, M., Hokada, T. and Toyoshima, T., Carbonic fluids in ultrahigh-temperature metamorphism: evidence from Raman spectroscopic study of fluid inclusions in granulites from the Napier Complex, East Antarctica, Geological Society of London, Special Publications, 308, 317-332., 2008.11.
57. Owada, M., Baba, S., Osanai, Y. and Kagami, H., Geochemistry of post-kinematic mafic dykes from central to eastern Dronning Maud Land, East Antarctica: evidence for a Pan-African suture in Dronning Maud Land, Geological Society of London, Special Publications, 308, 235-252., 2008.11.
58. Miyamoto, T., Satish-Kumar, M., Dunkley, D.J., Osanai, Y., Yoshimura, Y., Motoyoshi, Y. and Carson, C.J., Post-peak (530 Ma) thermal history of Lutzow-Holm Complex, East Antarctica, based on Rb–Sr and Sm–Nd mineral chronology, Geological Society of London, Special Publications, 308, 165-182., 2008.11.
59. Satish-Kumar, M., Miyamoto, T., Hermann, J., Kagami, H., Osanai, Y. and Motoyoshi, Y., Pre-metamorphic carbon, oxygen and strontium isotope signature of high-grade marbles from the Lützow-Holm Complex, East Antarctica: apparent age constraints of carbonate deposition, Geological Society of London, Special Publications, 308, 147-164., 2008.11.
60. Toyoshima, T., Osanai, Y. and Nogi, Y., Macroscopic geological structures of the Napier and Rayner Complexes, East Antarctica, Geological Society of London, Special Publications, 308, 139-146., 2008.11.
61. Kawasaki, T. and Osanai, Y., Empirical thermometer of TiO2 in quartz for ultrahigh-temperature granulites of East Antarctica, Geological Society of London, Special Publications, 308, 419-430., 2008.11.
62. Osanai, Y., Nakano, N., Owada, M., Tran Ngoc Nam, Miyamoto, T., Nguyen Thi Minh, Nguyen Van Nam and Tran Van Tri, Collision zone metamorphism in Vietnam and adjacent South-eastern Asia: Proposition for Trans Vietnam Orogenic Belt, Jour. Mineral. Petrol. Sci., 103, 226-241., 2008.08.
63. Yamada, S., Owada, M. and Osanai, Y., Amphibolite-facies metamorphic rocks of the Mt. Tenzan area, northern Kyushu, Southwest Japan: Correlation with the Higo metamorphic rocks, Jour. Mineral. Petrol. Sci., 103, 291-296., 2008.08.
64. Nakano, N., Osanai, Y. and Owada, M., Textural varieties in the Indochinese metamorphic rocks: A key for understanding Asian tectonics, Island Arc, 17, 2-5, 2008.01.
65. Nakano, N., Osanai, Y., Minh, N.T., Miyamoto, T., Hayasaka, Y. and Owada, M., Discovery of high-pressure granulite-facies metamorphism in northern Vietnam: Constraints on the Permo-Triassic Indochinese continental collision tectonics, Compites Rndus Geoscience, 340, 127-138, 2008.01.
66. Baba, S., Owada, M., Li, Z., Nakano, N. and Osanai, Y, Multiple-collision zones in the Sanjiang Region, SW China, Jour. Geol. Soc. Japan, 113, XIII-XIV, 2007.10.
67. Nakano, N., Osanai, Y. and Owada, M., Multiple breakdown and chemical equilibrium of silicic clinopyroxene under extreme metamorphic conditions in the Kontum Massif, central Vietnam, American Mineralogist, 92, 1844-1855, 2007.10.
68. Owada, M., Osanai, Y., Nakano, N., Matsushita, T., Tran Ngoc Nam, Tsunogae, T., Toyoshima, T., Pham Binh and Kagami, H, Crustal anatexis and formation of two types of granitic magmas in the Kontum massif, Vietnam: Implications for magma processes in collision zones, Gondwana Research, 12, 428-437., 2007.06.
69. Nakano, N., Osanai, Y., Owada, M., Tran Ngoc Nam, Toyoshima, T., Binh, P. Tsunogae, T. and Kagami, H., Geologic and metamorphic evolution of the basement complexes in the Kontum massif, central Vietnam, Gondwana Research, 12, 438-453., 2007.06.
70. Sajeev, K., Osanai, Y., Connolly, J.A.D., Suzuki, S., Ishioka, J., Kagami, H. and Rino, S, Extreme Crustal Metamorphism during a Neoproterozoic Event in Sri Lanka: A Study of Dry Mafic Granulites, Journal of Geology, 115, 563-582, 2007.03.
71. Osanai, Y., Shiraishi, K., Owada, M. and Toyoshima, T., Geological evolution of Sソr Rondane Mountains, East Antarctica: viewed from Asian Collision Zone. , Proc. Intl. Symp. Asian Collaboration in IPY 2007-2008, 18-20., 2007.03.
72. Nakano, N., Osanai, Y., Owada, M., Tran Ngoc Nam, Toyoshima, T., Binh, P. Tsunogae, T. and Kagami, H., Geologic and metamorphic evolution of the basement complexes in the Kontum massif, central Vietnam., Gondwana Res., 10, in press, 2007.03.
73. Owada, M., Osanai, Y., Nakano, N., Tran N. Nam, Pham Binh, Toyoshima, T. and Tsunogae, T., Petrogenesis of Plei Man Ko granite: Evidence from mineral texture and chemistry, Jour. Geol. Vietnam, Ser. A, 296, 28-37., 2006.11.
74. Nakano, N., Osanai, Y., Nguyen T. Minh, Miyamoto, T., Tran N. Nam and Owada, M., Discovery of eclogites and related high-pressure rocks from the Song Ma Suture zone in northern Vietnam. , . Jour. Geol. Vietnam, Ser. A, 296, 16-27., 2006.11.
75. Miyamoto, T., Osanai, Y., Nakano, N., Owada, M., Nguyn T. Minh, Duong D. Kiem and Tran N. Nam, Isotope compositions of mineral fractions in metamorphic rocks from Po Ko and Dien Bien Phu regions: a preliminary report for geochronological research of Indochina Peninsula, Jour. Geol. Vietnam, Ser. A, 296, 38-45, 2006.11.
76. Owada, M., Osanai, Y., Hokada, T. and Nakano, N., Timing of metamorphism and formation of garnet granite in the Kontum Massif, central Vietnam: Evidence from monazite EMP dating., Jour. Mineral. Petrol. Sci., 101, 324-328., 2006.10.
77. Choi, S.H., Mukasa, S.B., Andronikov, A.V., Osanai, Y., Harley, S.L. amd Kelly, N.M, Lu-Hf Systematics of the Ultra-High Temperature Napier Metamorphic Complex in Antarctica: Evidence for the Early Archean Differentiation of Earth's Mantle., Earth Planet. Sci. Lett., 246, 305-316., 2006.05.
78. Satish-Mumar, M., Hermann, J., Tsunogae, T. and Osanai, Y., Carbonation of Cl-rich scapolite boudins in Skallen, East Antarctica: Evidence for changing fluid condition in the continental crust., Jour. Metamorphic Geol., 24, 241-261., 2006.02.
79. Osanai, Y., Sajeev, K., Owada,M., Kehalpannala, K.V.W., Prem, W.K.B., Nakano, N. and Jayatileke, S., Metamorphic evolution of ultrahigh-temperature and high-pressure granulites from the Highland Complex, Sri Lanka, Journal of Asian Earth Science, 28, 20-37., 2006.06.
80. Osanai, Y., Owada, M., Kamei, A., Hamamoto, T., Kagami, H., Toyoshima, T., Nakano, N. and Tran Ngoc Nam, The Higo metamorphic complex in Kyushu, Japan as the fragment of Permo-Triassic metamorphic complexes in East Asia., Gondwana Res., 9, 152-166., 2006.01.
81. Sajeev, K. and Osanai, Y., Thermal gradients in the Sri Lankan granulite terrane: a garnet-biotite thermometric approach., J. Metamorphic Geol., 10.1111/j.1525-1314.2005.00582.x, 23, 5, 383-397, 23, 383-397., 2005.07.
82. Satish-Kumar, M., Osanai, Y. and Tsunogae, T., Development of fluid induced reactions, fracturing and compositional zoning in scapolite, Skallen, East Antarctica., Jour. Geol. Soc. Japan, 111, no. 3, IX-X., 2005.03.
83. Tran Ngoc Nam, Osanai, Y., Nakano, N. and Hoang Hoa Tham, Permo-Triassic ultrahigh-temperature metamorphism and continental collision in the Kontum Massif?, Jour. Geol. Vietnam, Ser. A, 285, 1-8., 2004.12.
84. Satish-Kumar, M., Miyamoto, T., Tsunogae, T., Wada, H. and Osanai, Y., Fluid-rock history of lower crustal metacarbonate rocks from Skallen, L将舩zow Holm Bay, East Antarctica., Gondwana Res., 7, 1381-1382., 2004.11.
85. Nam, T.N., Osanai, Y. and Nakano, N., Tectono-metamorphic evolution of crystalline basement complexes in the Kontum Massif, Vietnam: fact and questions?, Gondwana Research, 7, 1353-1355., 2004.11.
86. Owada, M., Osanai, Y., Nakano, N., Nam, T.N., Binh, P., Matsushita, T., Tsunogae, T., Toyoshima, T. and Kagami, H., Petrogenesis of the Late Permian Plei Man Ko granite in the Kontum Massif, central Vietnam., Gondwana Research, 7, 1363-1365., 2004.11.
87. Nakano, N., Osanai, Y., Owada, M., Tran Ngoc Nam, Tsunogae, T., Toyoshima, T. and Pham Binh,, Finding of UHP metamorphic rocks from the Kontum Massif, central Vietnam., Gondwana Research, 7, 1350-1352., 2004.11.
88. Osanai, Y., Nakano, N., Owada, M., Nam, T.N., Toyoshima, T., Tsunogae, T., Binh, P. and Kagami, H., Metamorphic evolution of high-pressure and ultrahigh-temperture granulites from the Kontum Massif, central Vietnam., Gondwana Research, 7, 1360-1363., 2004.11.
89. Shimura, T., Owada, M., Osanai, Y. Komatsu, M. and Kagami, H., Variety and genesis of the pyroxene bearing S- and I-type granitoids from the Hidaka Metamorphic Belt, Hokkaido, northern Japan., Trans. Royal Soc. Edinburgh, Earth Sci., 95, 161-179, 95, 161-179., 2004.12.
90. 0sanai, Y., Toyoshima, T., Owada, M., Tsunogae, T., Hokada, T., Kawasaki, T., Kawano, Y., Ikeda, T., Kawakami, T., Motoyoshi, Y. and Crowe, W.A., Explanatory text of geological map of Skallen, Dronning Maud Land, Antarctica (Revised edition), Antarctic Geological Map Series, Sheet 40, National Institute of Polar Research, 23pp, 2004.01.
91. Sajeev, K., Osanai, Y. and Santosh, M., Ultrahigh-temperature metamorphism followed by two-stage decompression of Grt-Opx-Sil granulites from Ganguvarpatti, Madurai block, southern India, Contrib. Mineral. Petrol., 10.1007/s00410-004-0592-0, 148, 1, 29-46, 148, 29-46, 2004.10.
92. Granulites from the western part of Sefuri Mountains, North Kyushu: aerial extent of low-P and high-T type metamorphic belt. Owada, M., Hada, R., Yada, J., Nakamura, M. and Osanai, Y., Jour. Geol. Soc. Japan, 110,in press.
93. Sajeev, K. and Osanai, Y., Osumulite and spinel + quartz from Sri Lanka: implications for UHT conditions and retrograde P-T path, Jour. Mineral. Petrol. Sci., 10.2465/jmps.99.320, 99, 5, 320-327, 99, 275-284., 2004.01.
94. Nakano, N., Osanai, Y., Owada, M., Tran, N. Nam, Tsunogae, T., Toyoshima, T. and Binh, P., Decompression process of mafic granulites from eclogite to granulite facies under ultrahigh-temperature condition in the Kontum massif, central Vietnam, Jour. Mineral. Petrol. Sci., 10.2465/jmps.99.242, 99, 4, 242-256, 99, 248-263., 2004.01.
95. Mouri, H., Guiraud, M. and Osanai, Y., Review on "corundum + quartz" assemblage in nature: possible indicator of ultra-high temperature conditions?, Jour. Mineral. Petrol. Sci., 99, 159-163., 2004.01.
96. Santosh, M., Osanai, Y. and Tsunogae, T., Ultrahigh temperature metamorphism and deep crustal process: Introduction, Jour. Mineral. Petrol. Sci., 10.2465/jmps.99.137, 99, 4, 137-139, 99, 137-139., 2004.01.
97. Osanai, Y., Nakano, N., Owada, M., Tran, N. Nam, Toyoshima, T., Tsunogae, T. and Binh, P., Permo-Triassic ultrahigh-temperature metamorphism in the Kontum massif, central Vietnam, Jour. Mineral. Petrol. Sci., 10.2465/jmps.99.225, 99, 4, 225-241, 99, 230-247., 2004.07.
98. Sajeev, K. and Osanai, Y., Ultrahigh-temperature metamorphism (1150 ℃ and 12 kbar) and multi-stage evolution of Mg-, Al-rich granulites from central Highland Complex, Sri Lanka, Journal of Petrology, 10.1093/petrology/egh035, 45, 9, 1821-1844, 45, 1821-1844., 2004.01.
99. Kagami, H., Shimura, T., Yuhara, M., Owada, M., Osanai, Y. and Shiraishi, K., Resetting and closing condition of Rb-Sr whole-rock isochron system: some samples of metamorphic and granitic rocks from the Gondwana super-continent and Japan Arc, Polar Geoscinece, 16, 227-242, 2003.01.
100. Tsunogae, T., Santosh, M., Osanai, Y., Owada, M., Toyoshima, T., Hokada, T. and Crowe, W., Fluid inclusions in an osumilite-bearing granulite from Bunt Island in the Archean Napier Complex, East Antarctica: implications for a clockwise P-T path?, Polar Geoscinece, 16, 61-75, 2003.01.
101. Sajeev, K., Osanai, Y., Suzuku, S. and Kagami, H., Geochronological evidence for multistage-metamorphic events in ultrahigh-temperature granulites from central Highland Complex, Sri Lanka, Polar Geoscience, 16, 137-148, 2003.01.
102. Owada, M., Osanai, Y., Shimura, T, Toyoshima, T. and Katsui, Y., Crustal sections and anatexis of lower crust due to mantle flux in the Hidaka metamorphic belt, Hokkaido, Japan, Geological Survey of Japan Interim report, 28, 81-102, 2003.01.
103. Tsunogae, T., Osanai, Y., Owada, M., Toyoshima, T., Hokada, T. and Crowe, W., High fluorine pargasites in ultrahigh temperature granulites from Tonagh Island in the Archean Napier Complex, East Antarctica, Lithos, 70, 21-38, 2003.01.
104. Owada, M., Osanai, Y., Toyoshima, T., Tsunogae, T., Hokada, T., Crowe, W.A. and Kagami, H., Early Proterozoic tectonothermal events in Napier Complex, east Antarctica: Implications for the formation of east Gondwana, Gondwana Research, 6, 231-240, 2003.01.
105. Crowe, W.A., Osanai, Y., Toyoshima, T., Owada, M., Tsunogae, T. and Hokada, T., SHRIMP geochronology of a mylonite zone on Tonagh Island: characterisation of the last high-grade tectonothermal event in the Napier Complex, East Antarctica, Polar Geoscinece, 15, 17-36, 2002.01.
106. Tsunogae, T., Santosh, M., Osanai, Y., Owada, M., Toyoshima, T. and Hokada, T., Very high-density carbonic fluid inclusions in sapphirine-bearing granulites from Tonagh Island in the Archean Napier Complex, East Antarctica: implications for CO2 infiltration during ultrahigh-temperature (T>1100。C) metamorphism, Contrib. Mineral. Petrol., 143, 279-299, 2002.01.
107. Sajeev, K., Osanai, Y. and Santosh, M., Ultrahigh-temperature stability of sapphirine and konerupine in Ganguvarpatti granulite, Madurai Block, Southern India, Gondwana Research, 4, 762-766, 2001.01.
108. Osanai, Y., Owada, M., Tsunogae, T., Toyoshima, T., Hokada, T., Long, T.V., Sajeev, K. and Nakano, N., Ultrahigh-temperature pelitic granulites from Kontum Massif, central Vietnam: Evidence for East Asian juxtaposition at ca.250 Ma, Gondwana Research, 4, 720-723, 2001.01.
109. Yamakawa, J., Ando, Y., Osanai, Y. and Kusachi, I., The crystal structure of scapolite in the Lutow-Holm Bay region, East Antarctica, Polar Geosci., 14, 67-74, 2001.01.
110. Tsunogae, T., Santosh, M., Osanai, Y., Owada, M., Toyoshima, T., Hokada, T., Crowe, W.A. and Miyano, T., Carbonic fluid inclusions in ultrahigh-temperature metamorphic rocks from Tonagh Island in the Archean Napier Complex, East Antarctica: a preliminary report, Polar Geoscinece, 14, 56-66, 2001.01.
111. Owada, M., Osanai, Y., Tsunogae, T., Hamamoto, T., Kagami, H., Toyoshima, T. and Hokada, T., Sm-Nd garnet ages of retrograde garnet bearing granulites from Tonagh Island in the Napier Complex, East Antarctica: A preliminary study, Polar Geosci., 14, 75-87, 2001.01.
112. Osanai, Y., Toyoshima, T., Owada, M., Tsunogae, T., Hokada, T., Crowe, W.A. and Kusachi, I., Ultrahigh temperature sapphirine-osumilite and sapphirine-quartz granulites from Bunt Island in the Napier Complex, East Antarctica: Reconnaissance estimation of P-T evolution, Polar Geosci., 14, 1-24, 2001.01.
113. Tsunogae, T., Osanai, Y., Owada, M., Toyoshima, T., Hokada, T. and Long, T.V., Field occurrence of high- and ultrahigh-temperature metamorphic rocks and related igneous rocks from the Kontum Massif, central Vietnam, Gondwana Res., 4, 236-241, 2001.01.
114. Osanai, Y., Toyoshima, T., Owada, M., Tsunogae, T., Hokada, T., Yoshimura, Y., Miyamoto, T., Motoyoshi, Y., Crowe, W.A., Harley, S.L., Kanao, M. and Iwata, M., Explanetary text of geological map of Tonagh Island, Enderby Land, Antarctica, Antarctic Geological Map Series, Sheet 38, National Institute of Polar Research, 40pp, 2001.01.
115. Tsunogae, T., Osanai, Y., Toyoshima, T., Owada, M., Hokada, T. and Crowe, W.A., Fluorine-rich calsic amphibole in ultrahigh-temperature mafic granulite from Tonagh Island in the Napier Complex, East Antarctica, Polar Geosci., 13, 103-113, 2000.01.
116. Owada, M., Osanai, Y., Tsunogae, T., Toyoshima, T., Hokada, T. and Crowe, W.A., LREE-enriched mafic gneiss and meta-ultramafic rock from Tonagh Island in the Napier Complex, East Antarctica, Polar Geosci., 13, 86-102, 2000.01.
117. Osanai, Y., Ando, T., Yamasaki, T., Doyama, D., Prame, W.K.B.N., Jayatileke, S. and Mathavan, V., Geological fieldwork of the southwestern and central parts of Highland Complex, Sri Lanka during 1998-1999, with special reference to the highest grade metamorphic rocks, Jour. Geosci. Osaka City Univ., 43, 227-247, 2000.01.
118. Low P/T metamorphic rocks from Sefuri Mountains and its correlation with low P/T type metamorphic rocks in Kyushu, southwest Japan. Owada, M., Jikihara, S., Osanai, Y. and Yamamoto, K., 2000, Memoir. Geol. Soc. Japan, no. 56, 229-240.
119. Protolith and Sm-Nd geochronology of garnet-clinopyroxene granulite and garnet amphibolite from the Kurosegawa belt in Kyushu, Southwest Japan. Osanai, Y., Hamamoto, T., Kagami, H., Owada, M., Doyama, D. and Ando, T., 2000, Memoir. Geol. Soc. Japan, no. 56,199-212.
120. Spatial-temporal variations and origin of granitic rocks from central to northern part of Kyushu, Southwest Japan. Owada, M., Kamei, A., Yamamoto, K., Osanai, Y. and Kagami, H., 1999, Memoir. Geol. Soc. Japan, no. 53, 349-363.
121. Grt-Opx granulite enclaves in S-type tonalite of the Hidaka Metamorphic Belt, northern Japan. Shimura, T., Komatsu, M., Iiyama, T. and Osanai, Y., 1999, Memoir. Geol. Soc. Japan, no. 53, 21-34.
122. Transition of space and time of Cretaceous to Tertiary igneous activity and lower crust of Honshu Arc-Examination based on Rb-Sr whole rock isochron ages and Sr and Nd isotopes-. Kagami, H., Kawano, Y., Ikawa, T., Ishioka, J., Kagashima, S., Yuhara, M., Shuto, K., Iizumi, S., Imaoka, Y., Owada, M., Osanai, Y. and Tainosho, Y., 1999, Memoir. Geol. Soc. Japan, no. 53, 1-19.
123. Owada, M., Osanai, Y., Toyoshima, T., Tsunogae, T., Hokada, T. and Crowe, W.A., Petrography and geochemistry for mafic rocks from Tonagh Island in the Napier Complex, East Antarctica, Polar Geosci., 12, 87-100, 1999.01.
124. Kusachi, I., Osanai, Y., Yoyoshima, T., Owada, M., Tsunogae, T., Hokada, T. and Crowe, W.A., Mineralogy of scapolite from Skallen, L殳zow-Holm Bay, East Antarctica, Polar Geosci., 12, 143-156, 1999.01.
125. Osanai, Y., Hamamoto, T., Kagami, H., Suzuki, K., Owada, M. and Kamei, A., The Higo high-grade metamorphic rocks in Japan as a part of the collisional terrane between the Sino-Korean and Yangtze cratons, Gondwana Research, 2, 599-601, 1999.01.
126. Osanai, Y., Hamamoto, T., Ando, T., Yamasaki, T., Saradhi, P. and Srinivas, S., Rb-Sr and Sm-Nd ages for potassium feldspar megacrystic charnockite pegmatite and garnet-bearing charnockitic leucosome from the central Eastern Ghats, India, Gondwana Research Group Memoir, 5, 145-160, 1999.01.
127. Tsunogae, T., Osanai, Y., Toyoshima, T., Owada, M., Hokada, T. and Crowe, W.A., Petrography and metamorphic reactions of ultra-high temperature mafic granulite from Tonagh Island in the Napier Complex, East Antarctica, Polar Geosci., 12, 71-86, 1999.01.
128. Hokada, T., Osanai, Y., Toyoshima, T., Owada, M., Tsunogae, T. and Crowe, W.A., Petrology and metamorphism of sapphirine-bearing aluminous gneisses from Tonagh Island in the Napier Complex, East Antarctica, Polar Geosci., 12, 49-70, 1999.01.
129. Toyoshima, T., Osanai, Y., Owada, M., Tsunogae, T., Hokada, T. and Crowe, W.A., Deformation of ultra-high-temperature metamorphic rocks from Tonagh Island in the Napier Complex, East Antarctica, Polar Geosci., 12, 29-48, 1999.01.
130. Osanai, Y., Toyoshima, T., Owada, M., Tsunogae, T., Hokada, T. and Crowe, W.A., Geology of ultrahigh-temperature metamorphic rocks from Tonagh Island in the Napier Complex, East Antarctica, Polar Geosci., 12, 1-28, 1999.01.
131. Arita, K., Toyoshima, T. and Osanai, Y., Metamorphism and deformation of the Hidaka metamorphic belt in southern Hidaka mountains, The second joint meeting of Korean and Japanese structure and tectonic research group,Field excursion guide book Hidaka collision zone, 23-42, 1999.01.
132. Yoshida, M., Ando, T., Divi, R.S., Ghatak, G., Hamamoto, T., Hari Prasad, B., Mathavan, W., Miyashita, Y., Miyazaki, T., Moses, B.V.C., Okudaira, T., Osanai, Y., Prame, W.K., Rajneesh-Kumar, Rao, A.T., Shaju, K.M., Shirahata, H., Suzuki, T., Takano, N., T, Field studies of Proterozoic terrains in Peninsular India and Sri Lanka during 1997-1998, Jour. Geosci. Osaka City Univ., 42, 179-203, 1999.01.
133. Hamamoto, T., Osanai, Y. and Kagami, H., Sm-Nd, Rb-Sr and K-Ar geochronology of the Higo metamorphic terrane, west-central Kyushu, Japan, The Island Arc, 8, 323-334, 1999.01.
134. Osanai, Y., Hamamoto, T., Maishima, O. and Kagami, H., Sapphirine-bearing granulites and related high-temperature metamorphic rocks from the Higo metamorphic terrane, west-central Kyushu, Japan, Jour. Metamorphic Geol., 16, 53-66, 1998.01.
135. Yoshida, M., Glebovitsky, V., Hamamoto, T., Kovach, V., Miyashita, Y., Osanai, Y., Rajesh, H.M., Rao, A.T., Santosh, M., Satish-Kumar, M., Shaw, R., Tani, Y., Wada, H., Yamamoto, T., Yamasaki, T. and Yoshikura, S., Geological survey in southern to eastern peninsular India, 1996, Jour. Geoscience, Osaka City Univ., 41, 47-75, 1998.01.
136. Owada, M., Kamei, A., Osanai, Y. and Kagami, H., Spacial and temporal variations for the Mesozoic granitic rocks in the Kyushu, southwest Japan, Tectonic Evolution of East Asia, pp. 89-94, Seoul, 1998.01.
137. Kamei, A., Owada, M., Hamamoto, T., Osanai, Y., Yuhara, M. and Kagami, H., Crystallization and cooling ages of late Triassic to early Cretaceous Miyanohara tonalite from the Higo metamorphic belt in central Kyushu, southwest Japan, Tectonic Evolution of East Asia, pp. 129-132, Seoul, 1998.01.