丸山研のメンバー

教授

丸山 茂徳 最近の論文 (1) Maruyama, S., Pacific-type orogeny revisited; Miyashiro-type orogey proposed. The Island Arc, 6, in press. (2)Maruyama, S., Liou, J.G. and Terabayashi, M., 1996, Blueschists and eclogites of the world and their exhumation. International Geology Review, 38, 490-596. (3)Maruyama, S. and Liou, J.G., 1997, Initiation of UHP metamorphism and its significance on the Proterozoic/P{hanerozoic boundary. The Island Arc, in press.

助教授

廣瀬 敬 新婚の廣瀬でぇ〜す。

PhD

小木曽哲 理化学研究所計算化学研究室協力研究員 最近の論文： Kogiso, T., K. Hirose, and E. Takahashi, Melting experiments on homogeneous mixtures of peridotite and basalt: Application to the genesis of ocean island basalts, Earth Planet. Sci. Lett., 162, 45-61. 1998.

太田 努 Postdoctoral fellow of JSPS [CURRENT RESEARCH] (1)geology and petrology of greenstone belts (Paleozoic - Mesozoic); Altai-Sayan[southern Russia], Hokkaido[Japan]. (2)metamorphic petrology of high-pressure and ultrahigh-pressure metamorphic rocks (Paleozoic - Cenozoic); Kokchetav [Kazakhstan], Altai-Sayan [southern Russia], Hokkaido [Japan], Timor-Tanimbar [Eastern Indonesia]. [PUBLICATION LIST] Tsutomu OTA, Masayuki Sakakibara and Tetsumaru Itaya, 1993, K-Ar ages of the Kamuikotan metamorphic rocks in Hokkaido, Japan. Jour. Geol. Soc. Japan, 99, 5, 335-345. (in Japanese) Masayuki Sakakibara and Tsutomu Ota, 1993, Metamorphic evolution of the Kamuikotan high-pressure and low-temperature metamorphic rocks in the central Hokkaido, Japan. Jour. Geophys. Res., 99, B11, 22221-22235. Tsutomu OTA, 1997, Modes of occurrence of sodic amphibole from the Kamuikotan metabasites,west of Asahikawa, central Hokkaido and the metamorphic history. Jour. Mineral. Petrol. Econ. Geol., 92, 103-123. (in Japanese) Tsutomu OTA, Evolution of the Kamuikotan high-P/T metamorphic belt in central Hokkaido, Japan; re-investigation of white mica K-Ar ages based on history of deformation and metamorphism. submitted to Mem. Geol. Soc. Japan. (in Japanese) Tsutomu Ota, Masaru Terabayashi, Christopher D. Parkinson and Hideki Masago, Thermobaric structure of the Kokchetav UHP-HP massif deduced from a north-south profile in the Kulet and Saldat-Kol regions, northern Kazakstan. submitted to The Island Arc.

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折橋 裕二 PDF (学振特別研究員） 最近の公表論文 1)Orihashi, Y., Al-Jailani, A. and Nagao. K. (1998) Dispersion of the Afar plume: implications from the spatiotemporal distribution of the late Miocene to recent volcanics, southwestern Arabian Peninsula. Gondwana Res. 1, 221-234. 2) Orihashi, Y., Maeda, J., Tanaka, R., Zeniya, R. and Niida, K. (in press, 1998) Sr and Nd isotopic data for the seven GSJ rock reference samples ; JA-1, JB-1a, JB-2, JB-3, JG-1a, JGb-1 and JR-1 . Geochem. Jour. 3) Agashev, A. M, Orihashi, Y., Watanabe, T. and Serenko, Y. P. (in press, 1998) Sr-Nd isotope and trace elements geochemistry of Siberian kimberlites. Russian Geology and Geophysics. 準備中の論文（はったりかも？） 1) Orihashi, Y., Nagao, K., Al-Jailani, A. and Hanan, B. B. (in prep.) Meteoritic primordial helium isotope signature from Plio-Quaternary alkaline basalts in Yemen. 2) Orihashi, Y., Hanan, B. B. and Al-Jailani, A. (in prep.) Isotope and geochemical constraints on the origin and evolution of the Yemen late Miocene-Recent basalts. 3) Orihashi, Y., Nagao. K., Al-Jailani, A. and Takigami, Y. (in prep.) Dispersion rate of the Afar mantle plume beneath the lithosphere. 4) Orihashi, Y. and Hirata, T. (in prep.) LA-ICP-MS analysis of minor elements for silicate rocks using XRF glass bead.

小宮剛 研究：太古代の緑色岩の地球化学的研究を行っています． これまでに，グリーンランド，オーストラリア，北アメリカ，ヨーロッパなどに調査などに行って来ました． 今年はアフリカにまで，足を伸ばすつもりです．今度，南アメリカと南極に連れて行ってくれる人を募集中です．

研究生

岡本 和明 沈み込み帯からちょろちょろマントルへしみでる水の研究しているじいさんだよ。今年の夏は南アフリカにいきます。その次は南米？どこでもいきまっす。 研究業績目録 　 （１）卒論、修論、学位論文 1987　岡本　和明、熊本県甲佐地域、間の谷ー肥後変成岩の地質学的岩石学的研究。広島大学卒業論文。 1989. Okamoto, K., Structural geology of the Sambagawa belt, Central Shikoku, Japan. Hiroshima Univ. master thesis. 1998, Okamoto, K., Dynamics of consuming plate boundary -Geological Petrological and experimental approach- , PhD thesis, Tokyo Institute of Technology, (MS). 　 （２）査読なし 1989 岡本　和明、原　郁夫、鈴木　盛久、九州甲佐地域の間の谷ー肥後変成岩の地質構造（予報）。地質学論集、第 33 号、187-198. 1990. Hara, I., Shiota, T., Takeda, K., Okamoto, K. and Hide, K., Sambagawa Terrane, IGCP 224, Pre-Cretaceous Terranes of Japan, 137-164. 1996. 丸山　茂徳、寺林　優、岡本　和明、世界の藍閃変成帯の上昇メカニズム、月刊　地球、vol. 18, No.3, 177-184. 1997. 岡本　和明、Max Schmidt, 丸山　茂徳、海水をマントルに運ぶ、科学、Vol. 67, 478-479. 　 （３）査読つき論文 1990, Hara, I., Shiota, T., Hide K., Okamoto, K., Takeda, K., Hayasaka, Y. and Sakurai, Y., Nappe structure of the Sambagawa belt. Journal of the Metamorphic geology, vol. 8, 441-456. 1998, Okamoto, K., Inclusion-trail geometry of albite porphyroblasts in a fold structure in the Sambagawa belt, Central Shikoku, Japan, The Island Arc 7, No. 1, 283-294. 1998, Okamoto, K. & Maruyama, S., Multi-anvil re-equilibration experiments of a Dabie Shan UHP eclogite within the diamond-stability fields. The Island Arc 7, No. 1, 52-69. 1999, Okamoto, K. and Maruyama, The upper stability limits of lawsonite in the MORB+H2O system. American Mineralogist 84, 362-373. 1999, Komiya, T., Maruyama, S., Masuda, T., Appel, P.W.U., Nohda, S., and Okamoto, K., The 3.8-3.7 Ga plate tectonics on the Earth; Field evidence from Isua accretionary complex, west Greenland. (accepted) Journal of geology. 2000, Okamoto, K., Maruyama, S. & Isozaki, Y., Accretionary complex preserved in the high P/T Sanbagawa belt, central Shikoku, Japan. Journal of the Geological Society of Japan (accepted). 　 　 （４）査読中 1999, Maruyama, S. and Okamoto, K., Water transportation mechanism from the subducting slab into the mantle transition zone. (submitted) Tectonophysics, Special volumes 1999, Kaneko, Y., Maruyama, S., Kadarusman, A., Ohta, T., Ishikawa, M., Tsujimori, T., Ishikawa, A. and Okamoto, K., Ongoing orogeny in the outer-arc of the Timor-Tanimbar region, eastern Indonesia. (in review) Tectonophysics. 1999, Okamoto, K., Liou, J.G., Ogasawara, Y. and Maruyama S., Petrological study of the diamond grade eclogite, Kumdy Kol area, Kazakfstan. The Island Arc (minor revision) 　 （５）投稿予定 1999, Okamoto, K. and Maruyama, S. The eclogite-garnetite transformation in the MORB+H2O system. (in preparation) Journal of Geophysical Research 1999, Shinjoe, H., Okamoto, K., Terada, K., and Sano Y., Zircon U-Pb ages of the Sanbagawa eclogite facies rocks; subduction and exhumation process from the upper mantle. Geology