1986 Fiscal Year Final Research Report Summary
Mechanism of metal transportation on the Obira type tin mineralization.
| Project/Area Number |
59470046
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
鉱物学(含岩石・鉱床学)
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| Research Institution | Kagoshima University |
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Principal Investigator |
NEDACHI Munetomo Professor, College of Liberal Arts, Kagoshima University, 教養部, 教授 (10107849)
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| Co-Investigator(Kenkyū-buntansha) |
ENJOJI Mamoru Assistant Prof., Institute of Geoscience, Univ. Tsukuba, 地球科学系, 講師 (70015890)
YAMAMOTO Masahiko Assistant, Faculty of Science, Kagoshima University, 理学部, 助手 (00041236)
URASHIMA Yukitoshi Professor, College of Liberal Arts, Kagoshima University, 教養部, 教授 (00000761)
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| Project Period (FY) |
1984 – 1986
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| Keywords | Ore deposit / Related igneous rock / Chlorine / Fluorine / 金属元素の移動 |
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| Research Abstract |
Geochemical research has been done on the Obira type tin mineralization in Kyushu, from the aspect of the relationship between magmatism and mineralization. The following knowledge were obtained through this research project.
1. The chlorine content of granitic rock closely related with mineralization is relatively high. The magma is also expected to be rich in chlorine during crystallization.
2. The hydrous minerals that precipitated at early stage of mineralization are remarkably rich in chlorine. It suggests that the primary ore solution was also high in chlorine.
3. Chlorine content of hydrous minerals in ore decreases steeply with advancing the mineralization, in spite of almost same in fluorine. It suggests that metal-chlorine-bearing magmatic was diluted with meteoritic pure water, and that metal precipitated by the decomposition of complex with chlorine.
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