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Discuss on the Molybdenum Deposit Geochemical Characteristics and Metallogenic Model in Xinghe County,Inner Mongolia

LI Xiang-zi1,BAN Yi-hong1,QUAN Zhi-xin1,WENG Ji-chang1,2,WANG Wei-dong(1.NO.2 Geoexploration Party of Henan Bureau of Geoexploration and Mineral Development,Xuchang 461000,China; 2.Geological Survey,Zhengzhou 450007,China)  
The Caosiyao molybdenum deposit in Xinghe County,Inner Mongolia is a super-huge type deposit,which was newly found by the No.2 Geoexploration Party of Henan Bureau of Geoexploration and Mineral Development.The molybdenum resources can be estimated to more than 200 million tons based to the exploration work.Through the analysis on the geochemical characteraistics of the deposit,the authors think that the debris geochemical measurement is a effective method to find porphyry molybdenum ore.The main molybdenum body outcrops are strictly limited in the comprehensive abnormal center of the element Mo、W、Cu、Pb、Zn、As and Sb.The metallogenic parent rock,granite porphyry is not only the main ore-control facter but also the crucial ore-hunting indicator.Element combination classification and horizontal zoning characteristics indicate the direction of the orebody prospecting.The three elements weighted ratio figure(Mo+W+Zn)/(Cu+As+Sb) reveals the molybdenum ore body's surficial denudation level and indicates the characteristic of correspondence between moltbdenum ore body margin and geophysical and geochemical equivalent line gradient belts.Consequently the metallogenic geochemical model of the Caosiyao molybdenum deposit was established.
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