凡口超大型铅锌矿床成矿流体的物理特征和地球化学特征  

GEOPHYSICAL AND GEOCHEMICAL FEATURES OF ORE-FORMING FLUID IN FANKOU SUPER-LARGE LEAD-ZINC DEPOSIT

作　　者：陈学明[1] 邓军[1] 沈崇辉 兰景志[1] 

机构地区：[1]中国地质大学地球科学与资源学院,北京100083

出　　处：《地球科学（中国地质大学学报）》2000年第4期438-442,共5页Earth Science-Journal of China University of Geosciences

基　　金：国家攀登计划项目专题!( 95 -预 -3 9-2 -1);国土资源部"百名跨世纪科技人才培养计划"基金!( 980 8) ;国土资源部重大基础项目

摘　　要：流体是汲取矿质、搬运矿质和沉淀矿质的介质 ,是当代盆地研究和成矿研究的重要课题 .在野外矿床地质研究和室内镜下研究、地球化学研究的基础上 ,对矿区矿物流体包裹体的温度、盐度和化学成分的测试分析结果表明 ,凡口矿床的成矿流体为低盐度、弱酸性的中低温热液 ,属富CO2 的K+ -Ca2 + -Cl-型的流体 .它既不同于盆地压实流体 ,也不同于斑岩型矿床的成矿流体 。The ore forming fluid, a medium that absorbs, transports and precipitates mineral materials, is an important topic for the research into the contemporary basin and mineralization. The testing analysis is made of the temperature, salinity and chemical composition of the mineral fluid inclusions in the deposit, on the basis of the field geological research into mineral deposits, the indoor microscopic research and geochemical research. The testing analytical results show that Fankou ore bearing fluid, the intermediate low temperature hydrothermal liquid low in salinity and weak in acidity, belongs to K + Ca 2+ Cl types of deep circulating ore bearing fluid rich in CO 2. This ore bearing fluid, a specific deep circulating fluid, differs not only from the basin compaction fluid but also from the ore forming fluid in the porphyrite type deposit.

关 键 词：超大型层控矿床 铅锌矿床 成矿流体 地球化学 

分 类 号：P618.401[天文地球—矿床学]