四川沐川地区上二叠统宣威组顶部发现同生沉积型铜矿  

DISCOVERY OF SYNSEDIMENTARY COPPER DEPOSIT IN THE TOP OF UPPER PERMIAN XUANWEI FORMATION IN MUCHUAN AREA,SICHUAN PROVINCE

作　　者：张航飞 龚骏[1] ZHANG Hang-fei;GONG Jun(No.207 Geological Team,Sichuan Bureau of Geology and Mineral Resources Exploration and Development,Leshan 614000,Sichuan Province,China)

机构地区：[1]四川省地质矿产勘查开发局207地质队,四川乐山614000

出　　处：《地质与资源》2022年第4期576-578,共3页Geology and Resources

基　　金：四川省自然资源厅省政府性投资地质勘查项目“四川省沐川县河口铌、稀土矿远景调查评价”(510201202038652/1).

摘　　要：根据上二叠统宣威组露头剖面、深部钻孔及采样测试分析,对四川沐川地区的沉积型铜矿进行了地质特征研究,结果表明,铜矿层为单层结构,矿层厚度0.45~1.53 m,铜矿石品位0.57%~0.76%.研究区铜矿属于潮坪环境的同生沉积矿床,矿石无热液或沉积改造现象,成矿物质来源于高铜背景值的峨眉山玄武岩.沐川地区沉积型铜矿成矿地质条件良好,找矿潜力巨大.The geological characteristics of sedimentary copper deposit in Muchuan area of Sichuan Province are studied based on the outcrop section,deep drilling and sampling test analysis of Upper Permian Xuanwei Formation.The results show that the copper formation is a single layer structure with the thickness of 0.45-1.53 m and ore grade of0.57%-0.76%.The copper deposit is of synsedimentary type in tidal flat environment,without hydrothermal or sedimentary transformation,and the ore-forming materials are derived from Emeishan basalts with high Cu background value.It is concluded that the sedimentary copper deposit in the study area has favorable metallogenic conditions and great prospecting potential.

关 键 词：铜矿 宣威组 同生沉积 峨眉山玄武岩 四川省 

分 类 号：P618.41[天文地球—矿床学]