2011 Fiscal Year Final Research Report
Dynamics of fluid boiling in hydrothermal system and formation of mineral deposits
| Project/Area Number |
21340156
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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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 | University of Tsukuba |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
KOMURO Kosei 筑波大学, 生命環境系, 講師 (40251037)
KUROSAWA Masanori 筑波大学, 生命環境系, 講師 (50272141)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 熱水鉱床 / 沸騰 / 気液分配 / 酸素同位体 / 流体包有物 |
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| Research Abstract |
Vapor/liquid partitioning coefficients for heavy metals were experimentally determined in order to understand the process of metal transport in vapor and precipitation to form mineral deposits. Volatile metals such as copper selectively partitioned into vapor under the presence of reduced sulfur species. Oxygen, hydrogen and sulfur isotopic compositions for ore and gangue minerals clarify origin of ore-forming fluids. Porphyry type deposits are formed from ore-forming fluid of magmatic origin, and metamorphic water is important for the formation of orogenic-type gold deposits. Both magmatic and meteoric waters are responsible for epithermal deposits.
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