云南香格里拉麻花坪钨铍矿聚矿构造及成矿时代分析  

Analysis of the tectonic of deposit and the age of mineralization in Mahuaping of Shangri-La in Yunnan

作　　者：冉明佳[1] 钟康惠[1] 李凡友[2] 罗明非[1] 刘肇昌[1] 唐菊兴[3] 

机构地区：[1]成都理工大学,成都610059 [2]四川华能康定水电有限责任公司,康定626003 [3]中国地质科学院矿产资源研究所,北京100037

出　　处：《四川有色金属》2011年第2期21-27,共7页Sichuan Nonferrous Metals

基　　金：国家科技攻关项目(962914201203);四川省级重点学科"矿物学;岩石学;矿床学"建设基金资助项目(SZD0407)资助

摘　　要：麻花坪矿床位于扬子地块西缘盐源-丽江陆架裂陷褶皱带,三江口-剑川深断裂东侧,是一个大型的钨铍矿床,自该矿床发现以来,很少有关于该矿床的报道。本文通过对该矿床的聚矿构造特征分析,认为麻花坪钨铍矿受虎跳峡背斜近轴部层间剪切断裂与横张裂隙控制。所测矿石铅同位素年龄和石英HAESRDQ年龄分别为19.70Ma和17.6Ma,代表顺层剪切带褶皱形成背斜和隆升的年代,说明麻花坪矿床的成矿作用发生于渐新世末-早中新世的中-晚喜马拉雅期。Mahuaping deposit which is located in the western margin of the Yangtze block Yanyuan-Lijiang rift shelf fold belt and the east of Sanjiangkou-Jianchuan deep fault is abundant in beryllium and tungsten.Since the deposit has been discovered,there is few reports on the deposits.In this paper,based on the study of the tectonic characteristics of ore deposits,the author concludes that the Mahuaping deposit is controlled by the paraxial and interlaminar shear fracture of Hutiaoxia anticline and the transverse and tensile crack.The measured isotopic age of the Lead is19.7Ma and the HAESRDQ age of Quartz is 17.6Ma,showing that the bedding shear zone is formed during the period of the anticline and uplift,which indicates that the role of mineralization of Mahuaping occurred in the late Oligocene-early Middle Miocene-late Himalayan period.

关 键 词：麻花坪 钨铍矿 聚矿构造 成矿时代 

分 类 号：P618.2[天文地球—矿床学]