Chemical compositions transferred in supercritical fluids from subducting slabs
| Project/Area Number |
25610155
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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/Economic geology
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2013: ¥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 / 塩水 / 不適合元素 / 超臨界流体 / 高温高圧実験 / 放射光X線 / 蛇紋石 / 非調和溶解 |
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| Outline of Final Research Achievements |
Recent findings of saline fluids from sub-arc mantle peridotite leads us to determine the effect of Cl on the trace element partitioning between aqueous fluids and melts. Synchrotron radiation X-ray fluorescence analysis is conducted to know trace elements partitioning between aqueous fluids and melts. Two slab-derived components, melt and fluid components, are suggested to explain trace element characteristics of arc-basalts. The fluid component is characterized by enrichment of alkali and alkali earth elements and can be explained if the fluid component is a saline fluid, because alkali earth elements and Pb are much less mobile with Cl-free fluids than Cl-rich fluids. Slab-derived components have compositional features consistent with a saline fluid and a melt, which can be formed through a separation of a slab-derived supercritical fluid. Slab-derived supercritical fluids contain Cl, and aqueous fluids inherit much of the Cl and some of the large-ion lithophile elements.
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Report
(3 results)
Research Products
(33 results)
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[Journal Article] Large ion lithophile elements delivered by saline fluids to the sub-arc mantle2014
Author(s)
Kawamoto, T., Mibe, K., Bureau, H., Reguer, S., Mocuta, C., Kubsky, S., Thiaudiere, D., Ono, S., Kogiso, T.
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Journal Title
Earth, Planets and Space
Volume: 66
Issue: 1
Pages: 61-61
DOI
NAID
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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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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[Presentation] スラブ流体は塩水2014
Author(s)
川本竜彦
Organizer
日本地球惑星科学連合2014年大会
Place of Presentation
横浜市パシフィコ横浜
Year and Date
2014-05-02
Related Report
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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
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
Related Report
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[Presentation] Subducted Halogens and Noble Gases in the Mantle Wedge Peridotites
Author(s)
Kobayashi M, Sumino H, Nagao K, Ishimaru S, Arai S, Yoshikawa M, Kawamoto T, Kumagai Y, Kobayashi T, Burgess R & Ballentine CJ
Organizer
Goldschmidt conference
Place of Presentation
Firenze, Italy
Related Report
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