多宝山铅锌矿床地质特征及地球化学研究  

Geological and Geochemiscal characteristics of Duobaoshan Pb-Zn Deposit in Hetian,Xinjiang

作　　者：杜红星[1,2] 魏永峰[3] 薛春纪[1] 齐天骄[1] 晋红展[2] 林美英[3] 李胜伟[2] 

机构地区：[1]中国地质大学,北京100083 [2]新疆维吾尔自治区地质矿产勘查开发局第八地质大队,新疆阿克苏843000 [3]四川省地质矿产勘查开发局区域地质调查队,四川双流610213

出　　处：《新疆地质》2012年第1期52-57,共6页Xinjiang Geology

基　　金："十二五"国家科技支撑计划课题(2011BAB06B02)项目资助

摘　　要：新疆和田县多宝山是西昆仑地区新发现的一处重要铅锌矿床,矿体呈似层状、不规则囊状、脉状,产于白垩系铁隆滩组碳酸盐岩岩溶角砾岩、生物碎屑灰岩中,围岩蚀变主要有碳酸盐化、白云石化、硅化及泥化等.矿石为块状、细脉状、浸染状、角砾状等构造.矿石矿物与脉石矿物中具极相似的微量元素组构,矿石中铅、锌硫化物δ34SV-CDT=-10.55‰～-1.01‰,矿石Pb同位素组成206Pb/204Pb=18.739 8～18.743 3,207Pb/204Pb=15.702 5～15.7040,208Pb/204Pb=39.092 9～39.097 1,成矿物质来源于白垩系铁隆滩组碳酸盐岩.矿石中方解石δ13CPDB=3.44‰～5.09‰,18OSMOW=23.09‰～26.79‰,热液中CO2来自海相碳酸盐岩去碳酸作用.流体包裹体均一温度为207℃～262℃,盐度为6.30%～7.73%,说明成矿流体来源于海水热卤水,矿床具MVT铅锌成矿特点.The Duobaoshan lead-zinc mine in Xinjiang is newly discovered mineral deposit, which formed in biological clastic limestone and karst breccia of Cretaceous Tielong Formation. The ores are often in shapes of stratiform-like, capsular and veinlike. Wall rock alterations are mainly carbonation, dolomitization and silicification. Fine-grained sulfide ore shows blocks-like, fine veinule, disseminated and fractured. The characters of Trace elements and REE in the host and in wall rocks are similar. The composition of S in mine ranges from δ^34Sv-CDT=-10.55‰-1.01‰, the composition of Pb in ore lies about 206Pb/204Pb=18.7398～18.7433,207pb/204Pb=15.7025-15.7040,208Pb/204Pb=39.0929-39.0971. Isotope of S and Pb indicates that the source of ore is from limestone of Cretaceious Tielong Formation. The composition of C and O in calcite of ore ranges are between δ^13CPDB=3.44‰～5.09‰, 18OSMow= 23.09‰-26.79‰ respectively, which indicate the CO2 in hot fuild mainly from marine carbonate. The chemical composition in fluid inclusion shows that the temperature of ore-forming fluid lies between 207℃-262℃, the salinity lies 6.30%-7.73% NaC1. In summary, the ore-forming fluid is from hot sea brine, ore genesis falls in MVT type.

关 键 词：和田县 多宝山铅锌矿 矿床地质 地球化学 

分 类 号：P618.4[天文地球—矿床学]