青海德尔尼铜矿床成因最新研究进展  

New Progress on the Ore-Genesis of the De′erni Copper Deposit

作　　者：董富权[1,2] 钱壮志[2] 王建中[3] 仲佳鑫[4] 孙涛[2] 徐刚[2] 段俊[2] 

机构地区：[1]中国人民武装警察部队黄金第11支队,湖南宁乡410600 [2]长安大学资源学院,陕西西安710054 [3]中国人民武装警察部队黄金第5支队,陕西西安710100 [4]宁夏国土资源调查监测院,宁夏银川750001

出　　处：《西北地质》2012年第3期93-102,共10页Northwestern Geology

基　　金：国家自然科学基金项目(40702015)

摘　　要：德尔尼铜矿床位于青海省玛沁县积石山中段德尔尼山南坡,是一个以铜为主,钴、锌等多元素可以综合利用的大型矿床。矿床成因存在较大分歧,因此,笔者运用宏观观察、矿相学研究及电子探针测试分析相结合的方法,重点对该矿床金属矿物矿相学、矿石矿物组合及矿床成因进行了系统研究,首次在德尔尼铜矿床中发现重晶石和石膏。石英-碳酸盐-重晶石-石膏为海底热液矿床的典型低温矿物组合。通过构造成矿环境、成矿物质来源研究,结合草莓状结构、矿体顶部的硅质岩、重晶石和石膏的发现等,种种迹象表明该矿床为海底热液喷流沉积矿床。De＇ erni copper deposit, located in the southern slope of Der erni, in the middle of Jishi Mountain, Maqin country, Qinghai Province, is a comprehensive utilization deposit which is dominated by copper. Because there are considerable differences in its ore-genesis, we have studied its ore-genesis by macro-observation, mineralogical studies and electron probe analysis in detail. This is the first time that barite and gypsum were discovered. Quartz-carbonate-barite-gypsum is not only a low-temperature mineral assemblage but also is a typical mineral composition of submarine hydrothermal deposit. By mineral envi- ronment of structure, material source, strawberry-like structure, siliceous rocks lying at the top of the orebodies, the discovery of barite and gypsum, we suggest that Dererni copper deposit is hydrothermal ex- halative-sedimentary deposit in seafloor.

关 键 词：德尔尼铜矿床 矿床成因 重晶石和石膏 海底热液喷流沉积 

分 类 号：P618-4101[天文地球—矿床学]