STUDY ON THE GEOCHEMICAL CHARACTERISTICS AND ORE-FORMING FLUIDS OF HENANZHUANG GOLD DEPOSIT
LI Zhao-yi1, CHEN Shou-yu1,2, LI Sheng-li3, CHEN Jun-lin1, TIAN Guang-li1, ZAN Pei1
1. Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China; 2. State Key Laboratory for Geological Process and Mineral Resources, China University of Geosciences, Wuhan 430074, China; 3. No.1 Institute of Geological Survey, Henan Bureau of Geology and Mineral Exploration, Zhengzhou 450000, China
Abstract：The Henanzhuang Gold Deposit is located on the Qinling tectonic belt in southernmost North China Plate with the host rock of a set of calc-muddy carbonate rock formation. The mineralization is controlled by strata and structure. The sources and metallogenic conditions of ore-forming fluid are studied by analyzing the trace, rare earth elements and C-H-O-S isotopes. The results show that the ore-forming fluid derived from magma is affected by later metamorphism and sedimentary reformation. The C and partial O elements come from the dissolution of marine carbonate, and catalyze the enrichment of Au. The S isotope and trace elements data indicate the deposit was formed in the anoxic reducing environment with the ore-forming fluid derived from deep crust or mantle. The geological and geochemical characteristics of the Henanzhuang Gold Deposit are similar to those of altered rock-type gold deposits, thus it should be classified as the latter.
2018, Vol. 27 
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