| Project/Area Number |
10640459
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Petrology/Mineralogy/Science of ore deposit
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| Research Institution | Kitami Institute of Technology |
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Principal Investigator |
MAEDA Hiroyuki Faculty of Engineering, Department of Civil Engineering, Kitami Institute of Technology, Professor, 工学部, 教授 (00003202)
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| Project Period (FY) |
1998 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2001: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2000: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1999: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1998: ¥1,500,000 (Direct Cost: ¥1,500,000)
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| Keywords | Eastern Hokkaido / Neogene / Volcanic activity / Hydrothermal activity / Epithermal Au-Ag mineralization / Hydrothermal alteration / Akan ore deposit / Tobetsu ore deposit / 弟子屈 / 浅熱水性金銀鉱床 / 浅熱水性銅鉛亜鉛鉱床 / ゼオライト岩 / K-Ar年代 |
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| Research Abstract |
Neogene hydrothermal activity in the Teshikaga district, eastern Hokkaido can be classified into three stages.
Stage I hydrothermal activity is related to andesitic and dacitic extrusive and intrusive activities associated mainly with neutral alteration.
Stage II hydrothermal activity is related mainly to andesitic intrusive activity associated with neutral alteration and the Akan epithermal gold-silver mineralization of 3.2-3.8 Ma and the Motoyama and Takinosawa epithermal gold-silver mineralizations of the Taiho ore deposit.
Stage III hydrothermal activity is related mainly to andesitic and dacitic intrusive and extrusive activities, especially relatively widespread andesitic volcanic activity associated with neutral alteration of 2.2 Ma and the Tobetsu epithermal gold-silver mineralization of 2.4 Ma and the Kanehana, Kinshu and Zuiho epithermal gold-silver mineralizations of the Taiho ore deposit and also is related to relatively local dacitic volcanic activity associated with the Shikerepeyama acid alteration of 2.3 Ma.
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