四川甘洛地区铜矿特征

通过野外地质调查、矿相学特征分析,探讨四川甘洛地区中二叠统茅口组灰岩及与玄武岩接触带附近的构造破碎带中块状硫化铜银矿成矿特征和矿化富集规律.新山铜矿的铜矿物有黄铜矿、助铜矿、砷助铜矿、斑铜矿、蓝铜矿,伴生闪锌矿、方铅矿.Cu的质量分数为1％～10％,最高达52％ ；Pb+Zn为2％～3％;Ag为100×10-6～200...

Characteristics of the copper deposit in Ganluo, Sichuan, China

This paper studies the metallogenic features and the mineralization enrichment regularity of copper-silver sulphide diposit.The deposit occurs in the limestone of Maokou Formation and the vicinity of structural fracture belt where the limestone is in contact with basalt in Middle Permian in Ganluo of Sichuan,China.The authors provide a new approach for prospecting in this paper.Through the field geological investigation and mineragraphy characteristics analysis,they discover that the mineral components of the Xinshan copper deposit include chalcopyrite,tetrahedrite,arsenfahlerz,bornite,azurite,associated sphalerite,and galena.The mass fraction of Cu is 1%～10%,Pb+Zn 2%～3%,and Ag 100×10-6～200×10-6.This ore-bearing stratum has been existed before the basalt eruption,with variety of useful minerals components and obvious structural ore-control characteristics.This has obviously nothing to do with volcanic mechanism.In summary,the authors preliminary believe that the deposit genesis is the filling of copper and polymetallic ore magma.This new copper deposit type has a high grade,is large scale,and accompanies rich beneficial elements.It has a great prospecting potential.