Host mineral phase determination related to elemental behavior during fluid

与流体过程中元素行为相关的宿主矿物相测定

• 批准号: 21740392
• 负责人: TANIMIZU Masaharu
• 金额: $ 1.91万
• 依托单位: Japan Agency for Marine-Earth Science and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21740392/
• 关键词: 断層; 破砕帯; 化学状態分析; 放射光; 曹長石; 硫黄同位体; 断層破砕帯

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.

利用同步辐射X射线对采自台湾车笼埔断层的沉积岩芯样品进行了微量元素的化学形态分析。几乎所有的Sr都存在于钠长石相中，钠长石在实验室实验中在250摄氏度以上的高温下在流体-岩石相互作用期间被观察到为新结晶相。Sr的主相表明断层中存在水，其高温可解释为断层同震摩擦加热的结果。这一结果将从矿物相和断面化学成分模式上支持断层弱化机制中的热增压假说。

项目成果

1999年台湾集集地震を引き起こしたチェルンプ断層の深部掘削の成果概要-明らかになってきた断層岩の物質科学と今後の課題-

引发1999年台湾集集地震的车笼埔断层深部挖掘成果综述 - 揭示断层岩石的材料科学和未来的挑战 -

• 发表时间: 2009
• 期刊: 地質学雑誌 115
• 作者: Byrne;Timothy;Weiren Lin;Akito Tsutsumi;Yuhji Yamamoto;Jonathan Lewis;Kyuichi Kanagawa;Yujin Kitamura;Asuka Yamaguchi;Gaku Kimura;徐垣・谷川亘・廣瀬丈洋・林為人・谷水雅治・石川剛志・廣野哲朗・中村教博・三島稔明・En-Chao Yeh・Sheng-Rong Song・Kuo-Fong Ma
• 通讯作者: 徐垣・谷川亘・廣瀬丈洋・林為人・谷水雅治・石川剛志・廣野哲朗・中村教博・三島稔明・En-Chao Yeh・Sheng-Rong Song・Kuo-Fong Ma