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GEOLOGICAL AND GEOCHEMICAL EVIDENCE OF CONTEMPORANEITY AND CONSANGUINITY OF THE SHIAOSIGOU PORPHYRY DEPOSIT AND ITS COEXISTING SKARN DEPOSITS

Bai Tianbao Zhao Bin(Institute of Geochemistry, Academia Sinica, Guiyang)  
The geology of the Shlaosigou porphyry deposit and its coexisting skarn deposits and the geochemistry of fluid inclusions, sulfur isotopes, trace elements and rare earth elements have been investigated in this paper. It is concluded that these two types of deposits are of contemporaneity and consanguinity, as indicated by ore deposition from the same ore-forming fluid in plutons and skarns at similar ore-forming temperatures. The variation of pH in the ore-forming fluids may be a mechanism for the relative separation of Mo and Cu between the plutons and the skarns.
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