| Project/Area Number |
23654187
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
MIBE Kenji 東京大学, 地震研究所, 助教 (10372426)
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| Project Period (FY) |
2011 – 2012
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | マグマ / 沈み込み帯 / 水流体 / 元素分配 / マントルウェッジ / 微量成分元素 / 高温高圧 / 超臨界流体 / 高温高圧実験 / 放射光X線 / スラブ流体 / 鉱物 / 蛍光X線 |
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| Research Abstract |
Using a micro-focused synchrotron x-ray beam, in-situ x-ray fluorescence spectra are obtained from aqueous fluids and haplogranite or jadeite melts under varied concentrations of (Na, K)Cl. Partition coefficients between the aqueous fluids and melts are calculated for Pb, Rb, and Sr. There is a positive correlation between the partition coefficients and pressure, as well as the partition coefficients and salinity. As compared to the saline fluids with 25 wt.% (Na, K)Cl, the Cl-free aqueous fluids can only dissolve one tenth (Pb, Rb) to one fifth (Sr) of the amount of large ion lithophile elements when they coexist with the melts. In the systems with 13-25 wt.% (Na, K)Cl, the partition coefficients of Rb and Pb are greater than unity, indicating the capacity of such highly saline fluids to effectively transfer Pb and Rb.
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