中国SEDEX型矿床成矿流体硼、硅、氦-氩同位素组成研究评述  

A Review on the B,Si,He-Ar Isotopic Compositions of the Ore-Forming Fluids of the SEDEX Type Ore Deposits in China

作　　者：祝朝辉[1] 张乾[1] 朱笑青[1] 何玉良[1] 

机构地区：[1]中国科学院地球化学研究所矿床地球化学国家重点实验室

出　　处：《矿物岩石地球化学通报》2006年第3期279-284,共6页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：中国科学院重要方向项目资助(KZCX3-SW-125);国家自然科学基金资助项目(40172037)

摘　　要：SEDEX型矿床成矿流体的研究是矿床地球化学研究的重要课题之一。正确识别系统中不同的流体来源及其混合过程,是深刻理解SEDEX型矿床形成演化的关键。系统总结了国内几个典型的SEDEX型矿床同位素研究成果,认为B和Si同位素是根据SEDEX型矿床独特的矿物组合而提出的一种示踪方法,对矿床成因和沉积环境示踪效果理想;He、Ar同位素则因为在地壳和地幔储库中有极不相同的组成,是理想的幔源流体示踪剂。鉴于SEDEX型矿床含有电气石、黄铁矿、硅质岩等特殊的矿物与岩石组合,B、Si、He-Ar同位素可能更适合SEDEX型矿床矿化流体来源研究,并指出其理论发展的薄弱之处。The study on the ore-forming fluid of the SEDEX ore deposits is one of the important subjects in the field of ore deposit geology and geochemistry. To distinguish different kinds of fluid sources and their mixing process of the ore-forming fluid system is the key to deeply understand the formation and evolution of the SEDEX type deposits. Based on the systemic summary of the isotopic study on several typical SEDEX ore deposits, It is indicated that the B,Si isotopic tracing method, which is proposed on the basis of the unique mineral association of the SEDEX deposits, is an ideal one for tracing ore genesis and sedimentary environment. The He, Ar isotopic compositions are ideal for tracing mantle sourced fluids due to the big differences between their isotopic compositions in crust and those in mantle. Due to the special mineral and rock association of tourmaline,pyrite,siliceous rock in the SEDEX deposits, the above methods could be more suitable for tracing the ore-forming fluid source of the SEDEX ore deposits. The disadvantage of the B,Si, He, Ar isotopic theory has been point out.

关 键 词：SEDEX矿床 成矿流体 硼同位素 硅同位素 氦-氩同位素 

分 类 号：P597[天文地球—地球化学]