| Sr Isotope Constraints on the Age and Source of Ore—Forming Materials of Gold Deposits,Southwestern Hunan |
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| 关 键 词： | 锶同位素 金属成矿物质 金矿床 云南 成矿作用 地质构造 流体包裹体 |
Sr isotope constraints on the age and source of ore-forming materials of gold deposits, southwestern Hunan |
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| Authors: | Jiantang Peng Ruizhong Hu Tagen Dai |
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| Institution: | 1. Institute of Geochemistry, Chinese Academy of Sciences, 550002, Guiyang, China
2. Department of Geology, Central South University of Technology, 410083, Changsha, China
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| Abstract: | We have measured Rb and Sr concentrations in fluid inclusions of quartz in gold deposits, southwestern Hunan. The Rb-Sr isochron ages of 435±9Ma and 412±33Ma are respectively determined, revealing that gold mineralization in this area took place in the Caledonian period rather than in the Wuling-Xuefeng period as traditionally considered. Sr isotope geochemistry of the hydrothermal fluid indicates that the ore-forming materials are of crust origin, derived largely from the ore-hosting strata rather than from the basic dikes. |
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