Trace element features of slab-fluids under high-pressure and high-temperature conditions using synchrotron x-ray fluorescence analysis
| 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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Report
(4 results)
Research Products
(61 results)
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[Journal Article] Mantle wedge infiltrated with saline fluids from dehydration and decarbonation of subducting slab2013
Author(s)
Kawamoto, T, Yoshikawa, M, Kumagai, Y, Mirabueno, MHT, Okuno, M, Kobayashi, T
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Journal Title
Proc. Natl. Acad. Sci. USA
Volume: 110
Pages: 9663-9668
Related Report
Peer Reviewed
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[Journal Article] Mantle wedge infiltrated with saline fluids from dehydration and decarbonation of subducting slab2013
Author(s)
Kawamoto, T, Yoshikawa, M, Kumagai, Y, Mirabueno, MHT, Okuno, M, Kobayashi, T
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Journal Title
Proc. Natl. Acad. Sci. USA
Volume: 110
Issue: 24
Pages: 9663-9668
DOI
Related Report
Peer Reviewed
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[Journal Article] Slab melting versus slab dehydration in subduction-zone magmatism2011
Author(s)
Mibe, K., Kawamoto, T., Matsukage, N. K., Fei, Y., Ono, S.
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Journal Title
Proceedings of the National Academy of Sciences, U. S. A.
Volume: 108, 20
Pages: 8177-8182
Related Report
Peer Reviewed
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[Presentation] アジア東縁の沈み込み帯に産するマントルかんらん岩中の間隙水起源ハロゲンと希ガス2013
Author(s)
小林真大, 角野浩史, 齋藤健彦, 長尾敬介, 石丸聡子, 荒井章司, 芳川雅子, 川本竜彦, 熊谷仁孝, 小林哲夫, Ray Burgess, Chris J. Ballentine
Organizer
地球惑星科学連合大会
Place of Presentation
千葉市
Year and Date
2013-05-23
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