青海沱沱河楚多曲铅锌银矿床流体包裹体特征及矿床成因  

Features of fluid inclusions in Chuduoqu Pb-Zn-Ag Deposit,Qinghai Province and genesis of the deposit

作　　者：陈生彦 湛守智 姚旭东 景向阳 

机构地区：[1]青海省第五地质矿产勘查院 [2]青海省第三地质矿产勘查院

出　　处：《黄金》2014年第10期30-33,共4页Gold

基　　金：国家自然科学基金项目(41272093)

摘　　要：青海省沱沱河楚多曲铅锌银矿床是近几年发现并正在勘查的大型铅锌矿床。利用Linkam(林克姆)THMS600型冷-热台对其主要蚀变矿物重晶石流体包裹体进行了测试。结果表明,包裹体主要以纯液相及气液二相为主,气液二相流体包裹体的均一温度在170～220℃,盐度为4%～12%,成矿流体密度为0.92～0.98 g/cm3,成矿压力为11～22 MPa,估算成矿深度为1.1～2.2 km。综合研究认为,楚多曲铅锌银矿床是与中酸性岩脉密切相关的、浅成中低温热液脉型矿床。Chuduoqu Pb- Zn- Ag Deposit,located in Tuotuo River of Qinghai province,is a large Pb- Zn deposit discovered and explored in recent years. Test results on the main alteration mineral fluid inclusions of barite made by Linkam THMS600 cold-hot station show that the main phases of inclusions are pure liquid and gas-liquid. The homogeneous temperature of the two phases is between 170 ℃ and 220 ℃. The salinity ranges from 4 % to 12 % NaCl. The ore-forming fluid density is from 0. 92 to 0. 98 g /cm^3. The ore-forming pressure is between 11 Mpa to 22 Mpa. The estimated metallogenic depth ranges from 1. 1 km to 2. 2 km. Combined with ore deposit geological background,Chuduoqu Pb- Zn- Ag Deposit is closely related to the acidic dike,which is hypabyssal and medium-low temperature fluid vein type deposit.

关 键 词：楚多曲铅锌银矿床 流体包裹体 矿床成因 浅成中低温热液脉型矿床 

分 类 号：TD11[矿业工程—矿山地质测量] P618[天文地球—矿床学]