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

Springer Science and Business Media LLC - Tập 19 - Trang 175-180 - 2000
Jiantang Peng1, Ruizhong Hu1, Tagen Dai2
1Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China
2Department of Geology, Central South University of Technology, Changsha, China

Tóm tắt

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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