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《Journal of Jilin University(Earth Science Edition)》 2011-05
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Sb-Au Mineral Potential Mapping Based on Expert Weights of Evidence in North Bayan Har Metallogenic Belt in Qinghai Province

DING Qing-feng1,2,ZHANG Ben-long1,WANG Guan1,JIN Sheng-kai1 1.College of Earth Science,Jilin University,Changchun 130061,China 2.State Key Laboratory for Mineral Deposits Research,Department of Earth Sciences,Nanjing University,Nanjing 210093,China  
Although generally not much researches have been done,the North Bayan Har metallogenic belt in Qinghai Province shown great mineral potentials and more prospecting achievement is expected.By synthesizing information from geology,geochemical prospecting,and mineral deposits etc.,the author build a GIS-based spatial database for North Bayan Har metallogenic belt in Qinghai Province.Then a new regional ore exploration model is built,in which prospective symbols including Au,Sb and As anomalies of stream sediment,heavy concentrate anomalies,NW-NWW striked linear structures and the Bayan Har group.And GIS-based mineral potential mapping is finished in the study area according to expert weights of evidence proposed by the present author earlier.Prospective areas and prospecting targets are mapped again,and prospective areas are defined as the area whose posterior probabilities are more than 0.001,and prospecting targets are the districts whose posterior probabilities are more than 0.005.Then prospecting potential grades of prospecting targets are divided into level A,B C based on double integrals of posterior probabilities of every forecasting ore-bearing grid in the study area.They consist of 6 prospecting targets with level A,10 ones with level B and 13 ones with level C.
【Fund】: 国家自然科学基金项目(40802021);; 吉林大学基本科研业务费专项(421030454422)
【CateGory Index】: P618.51
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