摘要
采用镜下鉴定及电子探针方法,研究西藏甲玛铜多金属矿床主要矿石矿物特征。显微镜鉴定结果表明,矿石结构主要为结晶结构、交代结构及固溶体分离结构;矿石构造以细脉浸染状构造为主,中等浸染状、稠密浸染状、块状构造次之。矿石类型较为复杂,以原生硫化物矿石为主,次为氧化物矿石和混合型矿石。据赋矿岩石不同可将矿石划分为夕卡岩型、角岩型;据矿床矿石矿物组合可将矿石划分为方铅矿-闪锌矿矿石、黄铜矿-辉钼矿矿石、辉钼矿矿石、黄铜矿矿石、黄铜矿-斑铜矿矿石、黄铜矿-斑铜矿-黝铜矿矿石6种类型,且此6种矿石类型在垂向上自上到下呈现依次过渡的趋势。矿石矿物的电子探针数据分析表明,矿石有用组分主要为铜、钼、铅、锌,此外伴生有丰富的银、金等元素。初步厘定了矿床成矿期次,进一步明确了矿床类型属夕卡岩型-角岩型矿床。
Abstract： The characteristics of the major minerals in the Jiama Cu-polymetallic deposit are analyzed through the use of microscope and electron probe.It is identified with the microscope that the ores are mainly of crystal,replacement or solid-solution separation structure,mostly veinlet-disseminated and secondarily moderately,densely and massively disseminated.Based on different host rock,the ores are classified as skarn-type and hornfels-type;Based on different mineral combination,six ore types are classified,which are galena sphalerite ore,chalcopyrite molybdenite ore,molybdenite ore,chalcopyrite ore,chalcopyrite bornite ore and chalcopyrite bornite tetrahedrite ore.These ores are distributed vertically from top to bottom in the ore body respectively.The analysis of the electroprobe data of minerals reveals that the main useful components are Cu,Mo,Pb,Zn and Ag,Au and other concomitants are abundant.And,further,the metallogenetic period is subdivided and the deposit is identified as a skarn-hornfels type.
出处
《成都理工大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第1期103-112,共10页
Journal of Chengdu University of Technology: Science & Technology Edition
基金
中央级公益性科研院所基本科研业务费专项资金资助项目(K0911)
国土资源地质大调查项目(1212010733803)
国家科技支撑项目(2006BAB01A01)
青藏专项项目(1212010818089)
