Soil Geochemical Anomaly Information Extraction and Prospecting Prediction of the Miegetan Gold Deposit,Northern Segment of the Dachang Gold Mine,Qinghai Province

The Miegetan gold deposit is located in the north of the Dachang Gold Mine,north Bayan Har Orogen,Qinghai Province,China.The main ore-bearing strata are sandstone of the Triassic Bayan Har Mountain Group.With well developed thrust faults,the ore bodies are distributed along NW structural fractures,which control the occurrence.Hydrothermal alterations include silicification,pyrite,arsenopyrite mineralization and sericitization.The results of soil geochemical survey for Au,As,Sb and Hg show the anomalies are obvious and have a prominent concentration center.All anomalies with a NW distribution have a good registration.The peaks of content variation trend in the section correspond well with the orebodies.The prospecting model developed on this basis can thus direct the prospecting work.The prospecting target and metallogenetic prospective area are delineated according to the comprehensive analysis of the geological and soil geochemical characteristics of the Miegetan gold deposit to provide the reference for the Miegetan gold deposit even the periphery of core area in the Dachang Mine.