四川省拉拉铜矿床地质特征及成矿条件  

Geological characteristics and ore-forming conditions of Lala Copper Deposit,Sichuan Province

作　　者：陈浩鹏[1] CHEN Hao-peng(Jiangxi Provincial Geological Survey Research Institute,Nanchang 330000,China)

机构地区：[1]江西省地质调查研究院,江西南昌330000

出　　处：《世界有色金属》2020年第16期88-89,共2页World Nonferrous Metals

摘　　要：四川省拉拉铜矿床位于康滇地轴的西南缘,矿床产于古元古界河口组变质火山-沉积地层中。矿体呈层状、透镜状,以叠瓦状形式产出,膨胀、分支复合、尖灭再现等现象明显,矿体产状与围岩基本相同,走向近东西或北西西,倾向南到南西西受构造、岩性控制明显。矿石主要成分为黄铜矿、斑铜矿、辉铜矿,矿石结构、构造复杂。本文在搜集区域地质、矿区地质特征及矿床特征等资料的基础上,讨论了成矿地层、构造、岩浆岩及变质作用等问题,并得出该矿床为火山沉积—变质成因的层控型铜矿床。Lala Copper Deposit in Sichuan province is located in the southwest margin of KangDian Axis,and its ore-bearing country rocks is Hekou Group which are composed of the Paleoproterozoic metamorphic volcanic exhalite and sedimentary interbeded rocks.The ore bodies are controlled by structure and lithology obviously.The principal mineral are chalcopyrite、chalcocite and bomite,and the mineral's lecture and structure are various.This paper is devoted to study on the sources of oreforming meterials、ore-forming condition and its mechanism.based on the character of field geology、lithogeochemistry、REE geochemistry and isotope geochemistry.Lala copper deposit is a stratabound ore deposit with a genesis of volcanic sedimentationmetamorphism.The ore-forming meterials concentrated first in the Hekou Group as volcan erupting in Paleoproterozoic,and they activized、migrated and concentrated to a higher grade with the metamorphism during Jinning in Neoproterozonic.

关 键 词：四川 拉拉铜矿床 康滇地轴 成矿条件 火山沉积—变质作用 

分 类 号：P618.41[天文地球—矿床学]