Tohoku University · 지구·행성과학
이 교수의 연구실은 지구 내부의 수분 분포와 물의 역할에 중점을 두고 있으며, 특히 맨틀 전이대의 수분 함유 상태와 그가 지각운동, 화산 활동, 지구 내부 물질 순환에 미치는 영향을 연구하고 있습니다. 고압·고온 조건에서의 수소 확산, 수화물질의 안정성, 그리고 슬랩의 깊은 탈수 현상과 관련된 광물물리학적 메커니즘을 중심으로 기초 연구를 수행하고 있습니다. 지구의 수분 순환과 내부 물질 순환의 기초를 제공하는 데 기여하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Research Article| January 01, 2005 Water in the Mantle Eiji Ohtani Eiji Ohtani 1Institute of Mineralogy, Petrology, and Economic Geology, Tohoku University, Sendai 980-8578, Japan E-mail: ohtani@mail.tains.tohoku.ac.jp Search for other works by this author on: GSW Google Scholar Elements (2005) 1 (1): 25–30. https://doi.org/10.2113/gselements.1.1.25 Article history first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Ic
Geophysical observations suggest that the transition zone is wet locally. Continental and oceanic sediment components together with the basaltic and peridotitic components might be transported and accumulated in the transition zone. Low-velocity anomalies at the upper mantle-transition zone boundary might be caused by the existence of dense hydrous magmas. Water can be carried farther into the lower mantle by the slabs. The anomalous Q and shear wave regions locating at the uppermost part of the
Hydrogen and deuterium isotopic evidence indicates that the source of terrestrial water was mostly meteorites, with additional influx from nebula gas during accretion. There are two Earth models, with large (7–12 ocean masses) and small (1–4 ocean masses) water budgets that can explain the geochemical, cosmochemical, and geological observations. Geophysical and mineral physics data indicate that the upper and lower mantles are generally dry, whereas the mantle transition zone is wetter, with het
Abstract Mineral physics data related to the deep dehydration of stagnant slabs are summarized. The hydrogen diffusion in minerals of the mantle transition zone is not fast enough to homogenize the transition zone on the geological time scale, and hydrogen is expected to be unevenly distributed there. The hydrous fluid formed in the transition zone tends to percolate into shallower depths to form gravitationally stable hydrous magmas at the base of the upper mantle. We need further studies on th
