青海省东昆仑地区铜矿成矿地质特征及靶区优选  

Metallogenic geological characteristics and targets optimization of copper deposit in Eastern Kunlun,Qinghai Province,China

作　　者：张普斌[1] 张宇[2,3] 杨自安[1] 刘忠法[2,3] 张建国[1] 石菲菲[1] 王娟[1] 

机构地区：[1]有色金属矿产地质调查中心,北京100012 [2]中南大学有色金属成矿预测教育部重点实验室,长沙410083 [3]中南大学地球科学与信息物理学院,长沙410083

出　　处：《中国有色金属学报》2013年第5期1405-1416,共12页The Chinese Journal of Nonferrous Metals

基　　金：国家"十一五"科技支撑计划资助项目(2006BAB01A06);中国地质调查局青藏专项(1212010818091);国土资源部公益性行业科研专项经费资助项目(200911007-04);中南大学有色金属成矿预测教育部重点实验室发展基金资助项目

摘　　要：青海东昆仑地区位于秦—祁—昆古陆边缘深断裂成矿构造带西端。区内大地构造演化先后经历了4次较大规模的拉伸与闭合过程,以昆北、昆中和昆南三大断裂为界分为祁漫塔格晚元古—早古生代叠加裂陷带(Ⅰ)、东昆仑古生代岛弧带(Ⅱ)和古生代消减杂岩带(Ⅲ)3个三级大地构造单元。在对典型矿床地质特征及前人资料系统分析的基础上,提出了造山晚期斑岩型+矽卡岩型铜多金属矿床、造山晚期斑岩型铜多金属矿床、晚元古代热水喷流沉积并经岩浆叠加改造富集的铜金多金属矿床3种重点寻找的铜矿床类型。根据区域总体成矿规律,优选出了7处铜矿找矿靶区,并分析了其找矿前景,认为雪山峰斑岩型铜矿靶区和东大滩斑岩与喷流沉积复合型铜矿靶区找矿前景最好。Eastern Kunlun, Qinghai Province, China, is located in the west of Qing-Qi-Kun Old Land Edge Deep Fracture Metallogenic Tectonic Belt. The tectonic in Eastern Ktmlun went through four large-scale stretching and closing processes, and three third tectonic units formed with Northern Kunlun Fault, Middle Kunlun Fault and Southern Kunlun Fault as boundary, are Qimantage Superimposed Rift Zone in late Proterozoic--early Paleozoic （ Ⅰ ）, Eastern Kunlun Island-arc Zone in Paleozoic （Ⅱ） and Abatement Complex Zone in Paleozoic （Ⅲ）. Based on study for geological characteristics of typical deposit and predecessors＇ material in the Eastern Kunlun, three key copper deposit types for prospecting, were put forward, which are namely porphyry ＋ skarn type Cu polymetallic deposits in the late of orogenic, porphyry type Cu polymetallic deposits in the late of orogenic and copper gold and polymetallic deposits of exhalative sedimentary and superimposed on the transformation of the enrichment by magma in the late Proterozoic. Seven targets for prospecting copper deposits were chosen and the prospecting outlook was analyzed according to the regionalmetallogenic regularity, and it was pointed out that Xueshanfeng Target of porphyry copper deposit and Dongdatan Target of compound type copper deposit of porphyry and SEDEX have the best prospecting outlook.

关 键 词：铜矿类型 大地构造演化 成矿规律 矿床地质特征 找矿靶区 东昆仑地区 

分 类 号：P612[天文地球—矿床学]