Japan Geoscience Union Meeting 2018

Session information

[EE] Oral

S (Solid Earth Sciences) » S-IT Science of the Earth's Interior & Tectonophysics

[S-IT25] Deep Carbon: Diamond formation and carbon speciation in Earth and planetary processes

Tue. May 22, 2018 10:45 AM - 12:15 PM A11 (Tokyo Bay Makuhari Hall)

convener:Eiji Ohtani(Department of Earth and Planetary Materials Science, Graduate School of Science, Tohoku University), Konstantin Litasov(V.S. Sobolev Institute of Geology and Mineralogy SB RAS), Hiroyuki Kagi(東京大学大学院理学系研究科附属地殻化学実験施設, 共同), Craig E Manning (University of California Los Angeles), Chairperson:Kagi Hiroyuki(University of Tokyo), Ohtani Eiji(Tohoku University)

Diamonds are observed in various localities including terrestrial and extraterrestrial environments. However, there are several reports on the diamond localities from non-traditional sources including ultra-deep seated diamonds, ultrahigh pressure metamorphic rocks, various magmas, some meteorites and terrestrial craters. These diamonds might be formed by shock events, crystallization from fluids, magmas, or metallic melts, and CVD process. In this session, we welcome papers on occurrence and origin of diamonds from traditional and non-traditional sources in earth and meteorites. We also encourage the experimental studies on diamond genesis, speciation of carbon bearing compounds in terrestrial rocks and meteorites. We welcome papers on formation mechanisms of diamond in natural metal-carbon systems, chromatographic study of deep seated and experimental fluids. We also welcome papers dealing with behavior of organic materials at high pressure and high temperature corresponding to the deep earth and planets. In some chromitites, various enigmatic high pressure phases have been reported as inclusions together with diamond. We also encourage the presentations on descriptions and discussions on the origin of these materials.

10:45 AM - 11:00 AM

*Masaaki Miyahara1, Eiji Ohtani2, Ahmed El Goresy3, Yangting Lin4, Hiroki Suga1, Takuji Ohigashi5 (1.Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, 2.Department of Earth Sciences, Graduate School of Science, Tohoku University, 3.Bayerisches Geoinstitut, Universität Bayreuth, 4.Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, 5.UVSOR Synchrotron, Institute for Molecular Science)

11:15 AM - 11:30 AM

*Konstantin Litasov1, Sergey Voropaev2, Vyacheslav Sevastyanov2, Hiroyuki Kagi3, Hiroaki Ohfuji4, Hidemi Ishibashi5, Erik Galimov2 (1.V.S. Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk, Russia, 2.Vernadsky Institute of Geochemistry and Analytical Chemistry RAS, Moscow, Russia, 3.Geochemical Research Center, University of Tokyo, Tokyo, Japan, 4.Geodynamic Research Center, Ehime University, Matsuyama, Japan, 5.Department of Geosciences, Faculty of Science, Shizuoka University, Shizuoka, Japan)

11:45 AM - 12:00 PM

Dmitry Zedgenizov1,4, *Hiroyuki Kagi2, Eiji Ohtani3, Tatsuki Tsujimori4, Kazuki Komatsu2, Seiji Kamada5 (1.V.S.Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, 2.Graduate School of Science, The University of Tokyo, 3.Graduate School of Science, Tohoku University, 4.Center for Northeast Asian Studies, Tohoku University, 5.Frontier Research Institute for Interdisciplinary Sciences, Tohoku University)



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