云南金都铜矿床地质特征及成因分析  

Geological Features and Genesis of the Jindu Cu Deposit in Yunnan

作　　者：吕星海[1] LÜ Xing-hai(The 4th Institute of Geological Survey,Henan Bureau of Geology and Mineral Resources,Zhengzhou 450001)

机构地区：[1]河南省地质矿产勘查开发局第四地质勘查院,郑州450001

出　　处：《四川地质学报》2020年第3期394-397,共4页Acta Geologica Sichuan

摘　　要：云南砂岩铜矿主要集中分布于滇中、滇西地区的中生代红层中,储量居国内同类矿床之首。金都铜矿地处滇西地区宁蒗县与攀西地区盐源县交界部位,矿区大面积出露峨眉山玄武岩,为砂岩铜矿提供了成矿物质来源。后期的造山运动形成了低洼盆地(向斜)等有利地势。表生作用下,含铜物质挟带泥沙被搬运至内陆盆地汇聚,形成铜矿床或含矿层位。形成隔绝氧气和阻断水力联系的泥质盖层后,含铜溶液在孔隙度大且水力联系好的砂岩中持续迁移,铜离子叠加富集,形成砂岩型工业铜矿体。本文在野外勘查成果的基础上,对金都铜矿地质特征及矿床成因进行了总结和分析,为该区铜矿勘查提供了地质依据。The sandstone copper deposits in Yunnan occur mainly in the Mesozoic red strata in the central and western Yunnan.The Jindu Cu deposit is located at the junction of Ninglang County and Yanyuan County.The Emeishan basalt widely exposed in the ore district provided ore material.Under supergene conditions,the ore material was transported to the inland basins,forming copper deposits or ore-bearing horizons.After the formation of argillaceous caprock which isolated oxygen and interrupted hydraulic connection,the Cu-bearing solution migrated in the sandstone with large porosity and good hydraulic connection,and copper ions were superimposed and enriched to form sandstone-type industrial copper ore body.Based on the results of field exploration,this paper summarizes and analyses the geological characteristics and genesis of the Jindu Cu deposit which provides a geological basis for copper exploration in this area.

关 键 词：云南 金都 砂岩铜矿 地质特征 矿床成因 

分 类 号：P618.41[天文地球—矿床学]