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Shoichi Kiyokawa Last modified date：2023.11.27

Associate Professor / Dynamics, Structure and Evolution of the Earth and Planets / Department of Earth and Planetary Sciences / Faculty of Sciences


Papers
1. Shoichi Kiyokawa, Masaru Yasunaga, Ayako Yamamoto, Daisaku Kaneko, Yuta Ikebata, Noriko Hasebe, Yukiyasu Tsutsumi, Mami Takehara, Kenji Horie. , Stratigraphic reconstruction of the lower–middle Miocene Goto Group, Nagasaki Prefecture, Japan. , Island arc, https://doi.org/10.1111/iar.12456, 1-39, https://doi.org/10.1111/iar.12456, 2022.08.
2. Earth's atmosphere and surface ocean were pervasively and mildly oxygenated after the ca. 2.4 Ga Great Oxidation Event (GOE), which induced dramatic environmental and biological changes. Positive nitrogen isotopic compositions of Paleoproterozoic marine deposits reveal aerobic nitrogen cycling and the widespread availability of bioavailable nitrate, but the nature of nitrogen cycling in freshwater environment remains unclear. To elucidate the redox conditions and bioavailability of nitrogen, redox-sensitive element and nitrogen isotopic compositions, as well as the depositional age, were determined for black shales of the late Paleoproterozoic Embury Lake Formation, Flin Flon belt, Canada. This formation accumulated in a sulfate-poor freshwater basin isolated from the open ocean, as indicated by its low total‑sulfur/total-organic‑carbon ratio of ∼0.05. Our U-Pb ages for detrital zircons show that the formation is younger than 1862.2 ± 2.6 Ma. Redox-sensitive elements (V and U) in the black shales show positive correlation with detrital tracers Al and Ti. Low enrichment factors for V and U indicate minor authigenic accumulations of the two elements. Moreover, the black shales are depleted in Mn, suggesting deposition under suboxic to anoxic conditions. δ15N values of the black shales are generally
3. Kosuke T. Goto, Yasuhito Sekine, Takashi Ito, Katsuhiko Suzuki, Ariel D. Anbar, Gwyneth W. Gordon, Yumiko Harigane, Teruyuki Maruoka, Gen Shimoda, Teruhiko Kashiwabara, Yutaro Takaya , Tatsuo Nozaki, James R. Hein. George M. Tetteh, Frank K. Nyame, Shoichi Kiyokawa, Progressive ocean oxygenation at ~2.2 Ga inferred from geochemistry and molybdenum isotopes of the Nsuta Mn deposit, Ghana, Chemical Geology, https://doi.org/10.1016/j.chemgeo.2021.120116, 567, 120116, 2020.07.
4. Shoichi Kiyokawa, Thematic section: Special topics in 4th IGS ‘Precambrian World 2’, Island Arc, DOI: 10.1111/iar.12360, e12360, 1-4, 2020.05.
5. Maekawa, T., Kiyokawa, S., Maeda, H., Tanaka, G., Costa, J. E. F., and Freitas, A. T., First report of early Permian albaillellarian radiolarians from East Timor, Paleontological Research, doi:10.2517/2020PR009., 25, 1, 32-40, 2020.05.
6. Shoichi Kiyokawa, Taishi Suzuki, Hanaa Abdenaby El-Dokouny, Maher Dawoud, Mohamed Mahmoud Abuelhasan,, Tectonic and sedimentary history of the neoproterozoic metavolcanic–volcaniclastic rocks of the El-Dabbah Group, Central Eastern Desert, Egypt., Journal of African Earth Sciences, https://doi.org/10.1016/j.jafrearsci.2020.103807, 165, 1-17, 2020.03.
7. Shoichi Kiyokawa, Taishi Suzuki, Kenji Horie, Mami Takehara, Hanna A. El-Dokouny, Maher Dawoud, Mohamed M. Abuelhasan,, Stratigraphy, petrology, and geochemistry of a Neoproterozoic banded iron sequence in the El-Dabbah Group, Central Eastern Desert, Egypt., Journal of African Earth Sciences, https://doi.org/10.1016/j.jafrearsci.2020.103807, 165, 1-16, 2020.02.
8. Kento Motomura, Shoichi Kiyokawa, Minoru Ikehara, Kentaro Tanaka, Yuji Sano, Geochemical constraints on the depositinal environment of the 1.84 Ga Embury Late Formation, Flin Flon Belt, Canada., Island arc, DOI: 10.1111/iar.12324, 334, 105475, 1-11, 2020.02.
9. Shoichi Kiyokawa, Yuhei Aihara, Mami Takehara, Kenji Horie, Timing and development of sedimentation of the Cleaverville Formation and a post-accretion pull-apart system in the Cleaverville area, coastal Pilbara Terrane, Pilbara, Western Australia, Island arc, DOI: 10.1111/iar.12324, 334, 105475, 1-23, 2019.10.
10. Tsutomu Ota, Yuhei Aihara, Shoichi Kiyokawa, Ryoji Tanaka, Eizo Nakamura,, Tourmaline in a Mesoarchean pelagic hydrothermal system: Implications for the habitat of early life., Precambrian Research, 10.1111/ iar.12182, 334, 105475, 1-17, 2019.10, [URL].
11. Takashi Sano, Motomaro Shirao, Kenichiro Tani, Yukiyasu Tsutsumi, Shoichi Kiyokawa, Toshitsugu Fujii, Progressive enrichment of arc magmas caused by the subduction of seamounts under Nishinoshima volcano, Izu–Bonin Arc, Japan., Journal of Volcanology and Geothermal Research, 319, 1, 52-65, 2016.01.
12. Shoichi Kiyokawa, Takuya Ueshiba, Rapid sedimentation of iron oxyhydroxides in an active hydrothermal shallow semi-enclosed bay at Satsuma Iwo-Jima Island, Kagoshima, Japan. , Sedimentary Geology, http://dx.doi.org/10.1016/j.sedgeo.2015.01.010, 319, 98-113, 2015.01.
13. 星野　辰彦, 倉富　隆, 室野　ゆき, 堀　ともゆき, 大岩根尚, 清川 昌一, 稲垣ふみお, Ecophysiology of Zetaproteobacteria Associated with Shallow Hydrothermal Iron-Oxyhydroxide Deposits in Nagahama Bay of Satsuma Iwo-Jima, Japan．, Frontiers Microbiology, http://dx.doi.org/10.3389/fmicb.2015.01554, １１, 2015.01.
14. Shoichi Kiyokawa, Shoichiro Koge, Takashi Ito, Minoru Ikehara, An ocean-floor carbonaceous sedimentary sequence in the 3.2-Ga Dixon Island Formation, coastal Pilbara terrane, Western Australia. , Precambrian Research, http://dx.doi.org/10.1016/j.precamres.2014.09.014, 255, 123-143, 2014.11, tThe Dixon Island Formation of the Pilbara terrane, Western Australia, extends from Cleaverville Beachto the Dixon Island coast, and is the only example worldwide of a coastal outcrop of a 3.2–3.1 Ga low-grade greenstone belt. The Dixon Island Formation was situated in an immature island arc setting andcomprises siliceous, carbonaceous deep-water sediments that contain evidence for hydrothermal andmicrobial activity. The extensive outcrop along the coastline makes it possible to examine in detail thecharacteristics of Mesoarchean sedimentation in a hydrothermal environment. This study focuses on acontinuously exposed carbonaceous, black chert succession in the central part of the northern coastlineoutcrop on Dixon Island. At this site, a 20-m-thick, carbonaceous, black chert sequence conformablyoverlies basement rocks of highly altered komatiite–rhyolite tuffs. The black chert sequence formedwell-bedded black chert with carbonaceous peloidal matter and fragmented grains, and the sequence ishomogeneous and finely laminated. In this sequence, evidence of low-temperature hydrothermal fluid,sediments and alteration stractures are well preserved in the lowermost section, indicating that high lev-els of hydrothermal activity occurred on the ocean floor during deposition. In particular, swarms of blackchert veins provide evidence of post-volcanic hydrothermal activity that released organic matter andsilica to the ocean. The carbonaceous peloidal textures and 13Corgvalues of sediments located just abovethe basement, which hosts the vein swarms, suggest that the veins were the conduits for hydrothermalfluid which contained organic-rich silica material and that flowed onto the seafloor to form the homo-geneous carbonaceous cherts along with hydrothermal-related sediment. The 13Corgvalues of organicmatter in the black cherts range from −42‰ to −22‰ (average = −31.9‰; n = 313). Lighter 13C values(−35‰ to −42‰) characterize carbonaceous laminated black chert located ∼5 m above the basement,where biogenic structures (e.g. biomat bed, microfossil structures) are found. The lighter 13C valuesmight be related to methanotrophic micro-organic activity within the sediments during hydrothermalactivity. In summary, we reconstructed the sedimentary environment upon a Mesoarchean hydrothermalocean floor that was a site of microbial activity and local methanogenesis.© 2014 Elsevier.
15. Shoichi Kiyokawa, Takashi Ito, Minoru Ikehara, Kosei Yamaguchi, Yusuke Suganuma, Preliminary report on the Dixon Island – Cleaverville Drilling Project, Pilbara Craton, Western Australia. , Geological Survey of Western Australia, Record 2012/14, 14, 1-39, 2012.05.
16. Ueshiba T., Kiyokawa S., , Long-term observations of iron-oxyhydroxide-rich reddish-brown water in Nagahama Bay, Satsuma Iwo-Jima Island, Kagoshima, Japan, , Memoirs of the faculty of sciences, Kyushu University, Series. D, Earth and Planetary Science,, 2012.05.
17. SHOICHI KIYOKAWA, TOMOMI NINOMIYA, TOMOAKI NAGATA, KAZUMASA OGURI, TAKASHI ITO, MINORU IKEHARA, KOSEI E. YAMAGUCHI, Effects of tides and weather on sedimentation of iron-oxyhydroxides in a
shallow-marine hydrothermal environment at Nagahama Bay, Satsuma
Iwo-Jima Island, Kagoshima, southwest Japan, The Island Arc, doi:10.1111/j.1440-1738.2012.00808, 2012.05.
18. Kiyokawa S., Ito, T., Ikehara, M., Yamaguchi, K.E., Koge S. and Sakamoto, R.,, Lateral variations in the lithology and organic chemistry of a black shale sequence on the Mesoarchean sea floor affected by hydrothermal processes: the Dixon Island Formation of the coastal Pilbara Terrane, Western Australia., The Island Arc, doi:10.1111/j.1440-1738.2012.00811, 2, 1-45, 2012.05.
19. Hisashi Oiwane, Shoichi Kiyokawa, Satoshi Tonai, Yukiyasu Nakamura, Hidekazu Tokuyama, Geomorphological development of the Goto Submarine Canyon, northeastern East China Sea, Marin Geology,, 288, 49-60, 2011.10.
20. Satoshi Tonai, Shoichi Kiyokawa, Yusuke suganuma, Juichiro Ashi, Hisashi Oiwane, Differential timing of vertical-axis block rotations in the northern Ryukyu Arc: Paleomagnetic evidence from the Koshikijima Islands, Japan, Tectonophysics,, 497, 71-84, 2011.01.
21. Yamaguchi K., Kiyokawa S., Ito T., Ikehara M., Kitajima F. and Suganuma Y., Clues of Early life: Dixon Island – Cleaverville Drilling Project (DXCL-dp) in the Pilbara Craton of Western Australia, Scientific Drilling, 7, 34-37, 2009.07.
22. Kiyokawa S. and Yokoyama K, Provenance of turbidite sands from IODP EXP 1301 in the northwestern Cascadia Basin, western North America., Marin geology, 10.1016/j.margeo.2009.01.003, 260, 19-29, 2009.07.
23. Tomomi Ninomiya and Shoichi Kiyokawa, Periodic Measurement of Seawater During a Tidal Cycle in Nagahama Bay, Satsuma Iwo-jima Island, Kagoshima, Japan, Mem. Fac. Sci., Kyushu Univ., Ser. D, Earth ＆ Planet. Sci, 2009.02.
24. Geologic structure and paleostress analysis in the Northern part of Koshikijima Islands, West Kyushu, Japan.
25. ‘The Albion Formation’, the Cretaceous-Tertiary boundary sequence in Belize: the ejecta formation of the nearest sequence from the Chicxulub crater, [URL].
26. Kiyokawa S. T. Ito, M. Ikehara and F. Kitajima, Middle Archean volcano-hydrothermal sequence: bacterial microfossil- bearing 3.2-Ga Dixon Island Formation, coastal Pilbara terrane, Australia., GSA Bulltin, v.118, no.1/2, 2006.01.
27. R. Tada., M. A. Iturralde-Vinent., T. Matsui., E. Tajika., T. Oji., K. Goto., Y. Nakano., H. Takayama., S. Yamamoto., S. Kiyokawa., K. Toyoda., D. Garcia-Delgado., C. Diaz-Otero., R. Rojas-Consuegra, K/T boundary deposit in the proto-Caribbean basin. American association of petroleum Geologists Memoir, American association of petroleum Geologists Memoir, Vol. 79, 582-604, 2004.01.
28. R. Tada., M. A. Iturralde-Vinent., T. Matsui., E. Tajika., T. Oji., K. Goto., Y. Nakano., H. Takayama., S. Yamamoto., S. Kiyokawa., K. Toyoda., D. Garcia-Delgado., C. Diaz-Otero., R. Rojas-Consuegra.,, K/T boundary deposit in the proto-Caribbean basin, American association of petroleum Geologists Memoir,, Vol. 79, 582-604, 2003.12.
29. Shoichi Kiyokawa, A. Taira, T. Byrne, S. Boweing, Y. Sano, Structural evolution of the middle Archean coastal Pilbara terrane, Western Australia, tectonics, 10.1029/2001TC001296, 21, 5, vol.21, No. 5, p. 1-24,, 2002.10.
30. Shoichi, Kiyokawa, R. Tada, M.Iturralde, etc., Cretaceous-Tertiary boundary sequence in the Cacarajicara Formatin, western Cuba: An impact-related, high-energy, gravity flow deposit, Geological Society of America special paper 356, 356, 125-144, 2002.08.
31. Shoichi Kiyokawa, Asahiko Taira, The Cleaverville group in the West Plibara coastal Granitoid-greenstone Terrain of Western Australia:an exaple of mid-Archean immature oceanic island-arc succession, Precambrian Research, 1998.12.
32. Kiyokawa S.,, Geology of the Idonnappu Belt, central Hokkaio, Japan - Evolution of a Cretaceous accretionary complex., Tectonics, vol.11, No. 6, p. 1180-1206, 1992.12.


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