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《GEOSCIENCE》 1999-01
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GEOCHEMICAL FEATURES OF THE YINDONGPO GOLD DEPOSIT IN TONGBAI REGION,HENAN PROVINCE

Zhang Zongheng Yan Anlu Li Jilin Han Cunqiang(No.3 Geological Surveying Party, Department of Geology and Mineral Resources of Henan Province, Xinyang, 464000)  
Research on the geochemical features of the Yindongpo gold deposit shows that the contents of ore forming elements relate closely with the stratigrahic sequence and rock types of the Waitoushan Formation. The distributions of ore forming elements change obviously in different stratigraphic horizons and rock types. In the middle and upper Waitoushan Formation, the carbonaceous sericite quartz schist, with the highest contents of Au and Ag, is the direct host rock, while the leptynite and the mica quartz schist contain rather higher ore forming elements. They constitute source beds together. The features of the invariable elements and the REEs of ores show that all kinds of the ores belong to altered tectonite. The alteration leads to notable increase of ore forming elements but has little influence on the migration of the REEs. According to the horizontal and vertical zoning succession of the elements, the authors consider that the migration of the hydrothermal ore forming solution relied mainly on seepage movement while making infiltration subsidiary. According to the element ratios of various elevations, the authors also establish geochemical evaluation indices and thus provide geochemical basis for guiding ore prospecting in the deep and periphery of the mining area.
【Fund】: 国家重点黄金地质科技攻关项目
【CateGory Index】: P681.510.4,P591.1
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