| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Research Abstract |
It is impossible for us to observe the formation process of epithermal gold deposit. Therefore, in order to elucidate the new and precise formation mechanism of epithermal gold deposits, natural epithermal gold-silver vein sample, siliceous deposit formed at geothermal power plant and artificial siliceous gold-bearing material were examined in terms of REE patterns as well as the chemical state of gold and silver. Based on the analysis of epithermal gold vein sample and siliceous deposit, it is reasonably concluded that Ce and Eu anomaly kept the redox condition when those were formed, and bulk analysis result were supported by local analysis for trace elements. On the other hand, the chemical state of gold in artificial materials were different from that in natural gold sample, suggesting that the other hydrothermal fluid should be mixed with hot ascending hydrothermal fluid.
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