2011 Fiscal Year Final Research Report
Host mineral phase determination related to elemental behavior during fluid
| Project/Area Number |
21740392
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Geochemistry/Astrochemistry
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| Research Institution | Japan Agency for Marine-Earth Science and Technology |
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Principal Investigator |
TANIMIZU Masaharu 独立行政法人海洋研究開発機構, 高知コア研究所, サブリーダー (20373459)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 断層 / 破砕帯 / 化学状態分析 / 放射光 / 曹長石 |
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| Research Abstract |
Chemical speciation analysis of trace elements was carried out for sediment core samples collected from Taiwan Chelungpu Fault using synchrotron X-ray radiation. Almost all Sr was present in the phase of albite, which is observed as a newly crystallized phase during the fluid-rock interaction at high temperatures of above 250 degrees Celsius in laboratory experiments. This host phase of Sr demonstrates the presence of water in the fault, and its high temperature can be interpreted as the result of co-seismic frictional heating of the fault. This result will support the hypothesis of thermal pressurization in fault weakening mechanism from mineral phase as well as transect chemical composition pattern.
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Research Products
(17 results)
