四川省沐川地区沉积型铜矿地质特征与找矿潜力  

Geological Features and Prospecting Potential of Sedimentary Cu Deposit in the Muchuan Region,Sichuan

作　　者：钟强生 张航飞 陈东方 文俊 杨敬 ZHONG Qiang-sheng;ZHANG Hang-fei;CHEN Dong-fang;WEN Jun;YANG Jing(The 207th Geological Team,BGEEMRSP,Leshan,Sichuan 614000;Zhang Jinyuan Labor Model Innovation Studio,Leshan,Sichuan 614000)

机构地区：[1]四川省地质矿产勘查开发局二零七地质队,四川乐山614000 [2]张金元劳模创新工作室,四川乐山614000

出　　处：《四川地质学报》2022年第1期56-60,共5页Acta Geologica Sichuan

基　　金：四川省自然资源厅2020年省政府性投资地质勘查项目资助(编号:510201202038652/1)。

摘　　要：扬子地块西南缘峨眉山大火成岩省玄武岩型铜矿及与其相关的沉积型铜矿已经有很多报道了。根据宣威组露头剖面、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和找矿潜力的研究。研究成果表明,铜矿层为单层结构,矿层厚度0.45~1.53m,铜矿石品位0.57%~0.76%。铜矿层以混合矿石为主,少量氧化矿石。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。沐川五指山背斜一带铜矿成矿地质条件良好,找矿潜力较大,有望成为铜多金属战略性矿产储备基地。This paper has a discussion on geological features and prospecting potential of sedimentary Cu deposit in the Muchuan region,Sichuan based on outcrop section of the Upper Permian Xuanwei Formation and core analyses.The study indicates that the sedimentary Cu deposit in the Muchuan region is a single Cu ore bed with a thickness of 0.45-1.53 m and ore grade of 0.57%-0.76%Cu.The Cu ore consists mainly of preliminary and oxidized Cu minerals.The Cu deposit is a syndepositional deposit in the tidal flat environment without hydrothermal alteration and reformation.Ore-forming material was derived from the Emeishan basalt.The Wuzhishan anticline area has good metallogenic geological conditions and great prospecting potential,and is expected to be a reserve base of Cu-polymetallic resources.

关 键 词：铜矿 峨眉山玄武岩 同生沉积 四川 

分 类 号：P612[天文地球—矿床学]