GEOCHEMICAL CHARACTERISTICS AND METALLOGENIC MODEL OF THE HUANGCHENGSHAN SILVER DEPOSIT IN HENAN PROVINCE
REN Ai-qin
1. Henan Institute of Geological Survey, Zhengzhou 450007, China;
2. No.3 Party of Geological Exploration, Henan Bureau of Geology for Mineral Exploration and Development, Xinyang 464000, China
The Huangchengshan silver deposit occurs in pyroclastic rock of Huangchengshan Formation and its basement.An integrated study of characteristics of ore geology,trace elements,isotopes and fluid inclusions shows that the ore-forming materials of the ore deposit were mainly indirectly derived from the pyroclastic rock of Huangchengshan Formation formed by volcanic eruption,and that the metallogenic media were dominated by meteoric water.Therefore,the deposit is of the shallow-seated volcanic hydrothermal type.It is held that silver mainly migrated in the form of [Ag(S2O3)2]3- complex under the shallow alkaline environment,and that geothermal fluid and its circulation and alteration action led to the formation of a series of mineral resources such as silver deposits and bentonite deposits.A metallogenic model of the ore deposits has been set up in this paper.
任爱琴. 河南省皇城山银矿床地球化学特征及成矿模式[J]. 物探与化探, 2006, 30(2): 133-136,140.
REN Ai-qin. GEOCHEMICAL CHARACTERISTICS AND METALLOGENIC MODEL OF THE HUANGCHENGSHAN SILVER DEPOSIT IN HENAN PROVINCE. Geophysical and Geochemical Exploration, 2006, 30(2): 133-136,140.
