| Project/Area Number |
23740391
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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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 |
KAWAKAMI Tetsuo 京都大学, 理学(系)研究科(研究院), 准教授 (70415777)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 地殻内流体 / 大陸衝突帯 / 塩水 / 物質循環 / 大陸地殻 / 南極 / ヒマラヤ / 変成岩 / 地殻流体 / 塩素 / 部分溶融 / 岩石学 / 物質移動 / 大陸衝突 / 年代 / 黒雲母 / 燐灰石 / ジルコン / ゴンドワナ |
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| Research Abstract |
The brine activity during the early stage of exhumation of the high-grade metamorphic rocks formed at the continental collision zone (ca. 600 Ma, 800oC, 0.8GPa) is detected from the Sør Rondane Mountains (SRM), East Antarctica. The brine activity can be traced somewhat linearly for about 200 km long, and this is the first report of such a large scale brine activity. In the Lützow-Holm Complex (LHC), East Antarctica (850oC, 1.2GPa), brine activity was detected to have accompanied by the partial melting as suggested by the presence of nanogranite inclusions in garnet. On the other hand, brine activity was not detected from the Nepal Himalayas and instead, boron-bearing fluid activity was detected. This difference can be the result of the difference in the depth level of the continental collision zones presently exposed in the SRM or LHC and in Himalayas.
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