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MINERALIZATION FEATURES AND REGULARITY OF RESIDUAL GOLD DEPOSIT IN YUNLING, JING COUNTY, ANHUI PROVINCE

LIU Hui-hua;Anhui Nuclear Exploration Technology Central Institute;  
The Yunling gold deposit lies in western part of Jing County, on the southern fringe folding belt of the lower Yangtze massif of the Yangtze landmass, and is dominated by residual gold mineralization in origin. Based on analysis of ore-forming geological features, this paper found that gold mineralization is controlled by Devonian Wutong Formation sandstone, Carbonaceous Huanglong Formation limestone, Permian Qixia Formation limestone, NE-trending faulting structure, Yunling granodiorite intrusion and ancient landform. The gold mineralization process is like this: early magmatic hydrothermal fluid formed gold-bearing pyritic ore body, which was structurally compressed, broken and uplifted to the surface, and then subjected to oxidization, weathering and accumulation, and finally turned into residual gold ore deposit as what we see today.
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