四川会理拉拉铜矿床流体特征及成矿条件研究  

FLUID FEATURES AND METALLOGENIC CONDITIONS IN LALA COPPER DEPOSIT,HUILI,SICHUAN,CHIAN

作　　者：金明霞[1] 沈苏[1] 

机构地区：[1]国土资源部成都地质矿产研究所

出　　处：《地质科技情报》1998年第S1期46-49,共4页Geological Science and Technology Information

基　　金：国家自然科学基金

摘　　要：通过研究四川会理拉拉铜矿床流体世代、形成温度、盐度、体系密度、压力等特征认为，从岩浆阶段—成岩阶段—成矿阶段—成矿期后阶段，流体共分为５个世代，其中第一世代至第四世代都与成矿有关。成矿流体属ＮａＣｌ－Ｈ２Ｏ体系，最佳成矿温度是４２０～２４０°Ｃ，盐度ｗ（ＮａＣｌ）为１３％～１７％，密度是０．８２～０．９７ｇ／ｃｍ３，而成矿压力为２０．０～４２．５ＭＰａ，属深源—浅成—多期动热改造的岩浆—热液矿床。According to the research on the fluid generations,oreforming temperature,salinity,system density and pressure of Lala copper deposit,Huili,it is considered that the fluid may be divided into five generations from magmatic stage—rockforming stage—metallogenic stage—post metallogenic stage.First to fourth generations are related to mineralization.Oreforming fluids belong to NaClH_2O system.The best oreforming temperature ranges in 420—240°C,salinity w(NaCl) 13%—17%,density 0.82—0.97 g/cm^3 and oreforming pressure is in the range of 20.0—42.5 MPa,which is attributed to anatectic—hypabyssal—hydrothermal depsoit reformed by multiphase thermodynamics.

关 键 词：成矿流体 剪切带 深源 浅成 

分 类 号：P641.5[天文地球—地质矿产勘探] P618.41[天文地球—地质学]