2014 Fiscal Year Final Research Report
Application of small-scale analysis of oxygen isotope to hydrothermal ore deposits
| Project/Area Number |
24540508
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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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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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 熱水鉱床 / 酸素同位体比 / 硫黄同位体 / 沸騰 / 鉱石組織 / 深部流体 |
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| Outline of Final Research Achievements |
Oxygen and sulfur isotope data of ore and gangue minerals occurring in hydrothermal deposits can be used to estimate origin of ore-forming solution and precipitation mechanisms. Oxygen and sulfur isotope data obtained in this study suggest following conclusions. Origin of geothermal water of Osorezan geothermal field is mixture of high-temperature volcanic gas and meteoric water. Fluid boiling and mixing with meteoric water was principle mechanism for formation of low-sulfidation style epithermal gold deposit at the Hishikari mine. Origin of sulfur of seafloor hydrothermal deposit at the Bayonnaise knoll is sulfate ion dissolving in seawater.
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| Free Research Field |
資源地質学
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