Sr isotope constraints on the age and source of ore-forming materials of gold deposits, southwestern Hunan

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Chinese Journal of Geochemistry | 2000年 / 19卷 / 02期
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We have measured Rb and Sr concentrations in fluid inclusions of quartz in gold deposits, southwestern Hunan. The Rb-Sr isochron ages of 435 &plusmn 9Ma and 412 &plusmn 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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页码：175 / 180
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