| Project/Area Number |
04640744
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
鉱物学(含岩石・鉱床学)
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| Research Institution | Keio University |
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Principal Investigator |
SHIKAZONO Naotatsu Keio University, Department of Earth Sciences, Associate Professor, 理工学部, 助教授 (10011751)
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| Project Period (FY) |
1992 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1993: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1992: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | Kuroko deposits / Back arc basin / Ridge / Hydrothermal system / Water-rock reaction / Global geochemical flux / Ocean chemistry / Minor elements / 水-岩石相互作用 / 物質移動メカニズム / 沈殿 / 流動 / 地球化学サイクル / 変質作用 / 海水組成 / 熱水 / 水ー岩石相互作用 |
|---|
| Research Abstract |
Mass transfer in back arc basin hydrothermal system was investigated. Mariana back arc basin hydrothermal are deposits, Kuroko deposits in Japan and hydrothermally altered rocks in the Kuroko area were studied in detail. Analytical results of hydrothermally altened rocks in the Kuroko area show the alteration trend similar to those in the ridge system. Rare earth elements pattern and distribution and chemistry of alteration minerals provide constraints on the evolution of hydrothermal system.
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