| Project/Area Number |
23654171
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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 |
Geology
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| Research Institution | Nagoya University |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
|
| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2011: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 地層 / γ線 / ジルコン / 堆積作用 / 後背地解析 / 矢作川 / モナザイト / 放射線スペクトル / 砕屑物 / 後背地 |
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| Research Abstract |
In order to quantify the provenance analysis of clastics , I used the gamma-ray intensity on Th and K as data linking detritus and source rocks. On the measurement condition, I found that more than 40 cm depth, measurement time of 1000 seconds is practical in the sediment. In order to elucidate the relationship of sediment composition and geology of the provenance, the expected gamma-ray intensity calculated from the geology of the provenance was compared those of the river sediment in three rivers. As a result, the measured value was less uniformly in all three rivers on gamma-ray intensity on K. The measured value on Th was lower in samples originating from metamorphic rocks for Th. Th is included in the monazite and zircon. Because the grain size distribution of granite and metamorphic mineral of them are different, the behavior is different to sedimentology.
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