新疆库车盆地康村地区砂岩型铜矿物源分析:LA-ICP-MS锆石U-Pb年代学证据  

Provenance analysis of sandstone type copper deposits in Kangcun area,Kuqa Basin,Xinjiang,China:LA-ICP-MS zircon U-Pb dating

作　　者：蔡厚安[1] CAI Houan(China Non-ferrous Metals Resource Geological Survey,Beijing 100012,China)

机构地区：[1]有色金属矿产地质调查中心,北京100012

出　　处：《矿产勘查》2023年第11期2032-2038,共7页Mineral Exploration

基　　金：中国地质调查局项目“西南天山成矿带霍什布拉克—乌拉根地质矿产调查”(DD20160001)资助。

摘　　要：新疆库车盆地的新生代地层中分布着众多砂岩型铜矿床和矿点,其与源-汇系统关系不清,而物源区是沉积盆地源-汇系统的重要组成部分。本文在野外调查的基础上开展康村地区碎屑岩中碎屑锆石的年代学研究,初步探讨库车盆地源-汇系统中成矿物质来源。结果表明:2件样品LA-ICP-MS测年数据分别为(427.4±6.6)Ma、(387.3±3.3)Ma和(424.6±2.3)Ma、(279.9±6.8)Ma,表明康村地区中新统吉迪克组(N1j)含铜砂砾岩的物源主要来自于库车盆地北西南天山造山带古生代晚志留世至早二叠世地质演化所形成的地层和岩浆岩产物。A series of sandstone-type copper deposits and occurrence distribute in the Kuqa Basin,Xinjiang.On the basis of field investigation,this paper carries out the geochronological study of detrital zircon in clastic rocks in Kangcun area,and preliminarily discusses the source of ore-forming materials in the source sink system of Kuqa basin.Detrital zircon dating results of two samples are(427.4±6.6)Ma,(387.3±3.3)Ma and(424.6±2.3)Ma,(279.9±6.8)Ma respectively.It indicates that the source of the copper-bearing sandy conglomerate in the Miocene Jidike Formation(N1j)is mainly from the stratum and magmatic rock products formed by the geological evolution during the Late Silurian to Early Permian.

关 键 词：新疆 库车盆地 砂岩型铜矿 LA-ICP-MS 

分 类 号：P588.14[天文地球—岩石学]