湖南道县大坳岩体型钨锡矿床地质特征与成因探讨  

Geological characteristics and genesis of the Da'ao intrusion-type tungsten-tin deposit,Daoxian County,Hunan

作　　者：刘树生[1] 曾志方[1] 赵永鑫[1] 

机构地区：[1]中国地质大学

出　　处：《中国地质》2007年第4期657-667,共11页Geology in China

基　　金：中国地质调查局地质大调查项目(200110200024)资助。

摘　　要：大坳岩体型钨锡矿床赋存于金鸡岭复式花岗岩体内。通过矿床成矿地质背景和矿床地质特征的阐述,运用Pb、S、H、O同位素测试成果,探讨了矿床成因,初步总结了矿床成因模式。认为该矿床是与区内多期次构造活动和岩浆脉动侵位、演化有关。矿床形成温度为260～340℃,成矿热液盐度为0.88%～11.22%,成矿压力为862×105Pa,成矿深度为2～3km。矿床属中—高温交代成因矿床。The Da＇ao intrusion-type tungsten-tin deposit is hosted in the Jinjiling composite granite body. The paper discusses the genesis of the deposit and preliminarily summarizes the metallogenic model of the deposit according to the geological setting and characteristics of the deposit and results of Pb, S, C and O isotopic analyses of granite and ores. The deposit formed by the polyphase tectonic movements and magmatic pulsation and evolution. The metaUogenic temperatures of the deposit range from 260 to 320℃, the salinities of ore-forming fluids range from 0.88% to 11.22%, the pressure is 862×10^5 Pa and the depth is 2-3 km. So the Da＇ao tungstentin deposit is of intermediate- and high-temperature metasomatic origin.

关 键 词：岩体型钨锡矿床 成矿岩体 成因 大坳 湖南 

分 类 号：P618.2[天文地球—矿床学]