内蒙古四五牧场金矿床成矿物质来源研究  

STUDY ON THE ORE-FORMING MATERIAL SOURCE OF SIWUMUCHANG GOLD DEPOSIT IN INNER MONGOLIA

作　　者：杨才[1] 郭根万[1] 郭万良[1] 徐国[1] 

机构地区：[1]内蒙古自治区地质调查院,内蒙古呼和浩特010020

出　　处：《地质与资源》2008年第1期26-29,共4页Geology and Resources

基　　金：中国地质调查局项目"内蒙古东北部四五牧场及外围金铜矿评价"(199810200102)

摘　　要：根据内蒙古四五牧场金矿床的S、Pb、O、C同位素组成特征,对金矿床成矿物质来源进行了分析.认为金属硫化物中的硫来源于火山岩盆地基底古生代海相地层;铅主要由赋矿地层及火山岩盆地基底岩石所提供;成矿流体在成矿期主要来源于岩浆,成矿期后热液中有大气水混入.四五牧场金矿成矿期为晚侏罗—早白垩世.Based on the characteristics of S, Pb, O and C isotope in the Siwumuchang gold deposit in Inner Mongolia, the ore-forming material resource is analyzed. It is concluded that the S in metallic sulfides comes from the volcanic rock basin of Paleozoic marine bed. The Pb is provided by host strata and volcanic rock basin. In mineralization period, the ore-forming fluid is mainly derived from magma, with meteoric water mixed after the mineralization. The mineralization period of the Siwumuchang gold deposit ranges from Late Jurassic to Early Cretaceous.

关 键 词：金矿床 成矿物质 同位素 内蒙古 

分 类 号：P618.51[天文地球—矿床学]