云南东川人占石铜矿床地质特征及成因研究  

A Study on Geological Characteristics and Genesis of the Renzhanshi Copper Deposit in the Dongchuan area,Yunnan Province

作　　者：肖晓牛[1] 张少云[1] 鞠昌荣[1,2] 张晓坤[1] 游奔 易飞[1] 邓辉[1] 

机构地区：[1]江苏省有色金属华东地质勘查局资源调查与评价研究院,江苏南京210007 [2]云南金山矿业有限公司,云南东川654100

出　　处：《地质与勘探》2012年第2期237-249,共13页Geology and Exploration

摘　　要：云南东川人占石铜矿位于川滇元古宙铜多金属成矿带之滇中一带,是江苏省有色金属华东地质勘查局和云南金山矿业有限公司新近勘查开发的一个资源产地。本文重点报导了矿体特征、矿石岩石学矿物学特征,矿物生成顺序与共生、交代关系等矿床地质特征,并从这些实际材料出发,通过综合类比研究,对矿床成因进行初步讨论。研究表明,人占石铜矿床赋存于青龙山组灰白色厚层状白云岩中,系在中元古界裂谷环境的海盆沉积碳酸盐含矿层经变质成矿作用之后,在晋宁期又叠加了热液改造富集,可以归属于"东川式"沉积变质叠加热液改造矿床,使东川地区原始含矿层位在继因民组、落雪组、黑山组、陡山沱组"四层楼"之后,又增加了青龙山组一层,丰富了东川成矿模式内容,为本区进一步找矿工作提供理论和科学依据。The Renzhanshi copper deposit in central Yunnan lies in the Proterozoic copper-polymetallic belt of Sichuan and Yunnan Provinces. It is a new resource area explored and exploited by East China Mineral Exploration and Development Bureau for Non-ferrous as well as Yunnan Jinshan Min- ing, Co. Ltd. This paper mainly presents geological characteristics of the orebody, petrological and mineralogical characteristics of copper ore, mineral for- mation order and symbiotic, and accountable relationship. Based on these real data of the deposit, and in combination with general comparative study, the genesis of the Renzhanshi copper deposit has been discussed. The study shows that this copper deposit occurs in off-white thick-bedded dolomite of the Qinglongshan Formation,enriched by hydrothermal alteration in the Jinning period after metamorphism of ore beds in a rift sedimentary basin environment of the Middle Proterozoic. It can be attributed to the ＂Dongehuan type＂ that is sedimentary-metamorphic superimposed by the hydrothermal alteration type deposit. Therefore,it increases Dongchuan original seam with Qinglongshan formation after＂four stories＂ named the Yinmin formation, Luoxue formation, Heishan formation, and Doushantuo formation, respectively. Obviously, it not only enriches the content of the Dongchuan metallogenic model, but also pro- vides theoretical and scientific basis for further prospecting in this district.

关 键 词：青龙山组矿床地质特征矿床成因 云南东川 

分 类 号：P618[天文地球—矿床学]