Revealing heat and material transportation process within upper mantle in a back arc region
| Project/Area Number |
21840067
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | Japan Agency for Marine-Earth Science and Technology |
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Principal Investigator |
SAKUYAMA Tetsuya Japan Agency for Marine-Earth Science and Technology, 地球内部ダイナミクス領域, ポストドクトラル研究員 (80553081)
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| Project Period (FY) |
2009 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2010: ¥1,573,000 (Direct Cost: ¥1,210,000、Indirect Cost: ¥363,000)
Fiscal Year 2009: ¥1,417,000 (Direct Cost: ¥1,090,000、Indirect Cost: ¥327,000)
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| Keywords | 背弧火成活動 / マントル / 融解 / 火山 / 時空変化 / 背弧域火成活動 / アルカリ玄武岩 / 東北アジア / 上部マントル融解 / 熱・物質循環プロセス / 沈み込みスラブ / 減圧融解 / 時間空間変化 |
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| Research Abstract |
We collected and analyzed Cenozoic alkaline basaltic rocks in eastern China. The basaltic rocks are richest in alkaline elements and FeO content and most depleted in Sr-Nd isotope composition among basaltic rocks distributed in northeastern Asia. Mantle potential temperature of the eastern China basalt is estimated to be higher than those of the southwestern Japan and northeastern China. Trace element patterns of the basalt require contribution of carbonatite melt into the melting of the depleted mid ocean ridge basalt mantle. Since the basaltic volcanisms locate above the edge of the stagnant slab, material provided from the western end of the stagnant slab may be contributing to generation of the magmatism.
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Report
(3 results)
Research Products
(23 results)
