投稿时间：2015-03-06
修订日期：2015-12-15
网络发布日期：2016-02-24
中文摘要:柯月锌多金属矿床是北喜马拉雅锑金多金属成矿带上新发现的重要矿 床。矿体主要 呈脉状、透镜状产于近南北向张扭性断裂中,金属矿物主要有方铅矿、闪锌矿、辉锑矿、脆 硫锑铅矿、硫锑铅矿、黄铁矿、毒砂、黄铜矿等,非金属矿物主要有石英、铁锰碳酸盐、方 解石等。矿石组构以热液充填交代成因为主。流体包裹体初步研究表明,包裹体以液体包裹 体为主,还有少量纯气体和纯液体包裹体。成矿流体为中低温、中低盐度、低密度H2O-Na Cl 体系。流体中气液成分以H2O为主,液相中局部含有少量的HCO-3、CO2-3和C O2,气相中局部 有少量CO2、CH4、N2。根据含矿石英脉中绢云母40Ar-39Ar定 年,准确限定柯月矿床成矿热液活动的时限为213 Ma。矿床地质特征表明,柯月为中低温 热液脉状锌多金属矿床,是后碰撞造山成矿作用的产物。
Abstract:Keyue is a newly discovered important deposit located along the antimony-gold p o lymetallic metallogenic belt. Orebodies are manly distributed in the nearly NS t ensile fractures in vein and lenticular forms. Metallic minerals include galena, sphalerite, stibnite, jamesonite, boulangerite, pyrite, arsenopyrite, copper e t c., whereas non-metallic minerals include quartz, ferrimanganic carbonate, calci te etc. The main ore fabrics are formed by typical filling and metasomatism of hydrothermal solution. The preliminary research on fluid inclusions indicates th at the fluid inclusions in Keyue are mainly liquid inclusions, including a small amount of pure vapor inclusions and pure liquid inclusions. The ore-forming flu id is of middle-low temperature, low salinity, low density H2O-NaCl system. Th e vapor and liquid components of fluid inclusions are mainly H2O, the liquids also have a little HCO3-, CO2-3, CO2, and the vapors also have som e CO2,CH4, N2. According to the analytical results of 40Ar- 39Ar isotopic data of sericite in the ore-bearing vein, the date of the hy drothermal activity of Keyue deposit can be defined at about 213 Ma accurately . According to the geological features, the Keyue deposit is a medium-low temper ature hydrothermal vein zinc polymetallic deposit, which is the product of post- collision of India plate and Eurasian plate.
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中图分类号：P618.43
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基金项目:本文得到公益性行业科研专项(编号: 201511022-02)、公益性行业专项(编号: 201511017 )和自然科学基金项目(编号: 41302060)共同资助
引用文本：
林彬,唐菊兴,郑文宝,王艺云,高一鸣,林鑫,杨欢欢,冷秋锋,李晓童,唐晓倩,付燕刚.2016.西藏柯月锌多金属矿床地质特征及成矿时代初步研究[J].矿床地质,35(1):33~50LIN Bin,TANG JuXing,ZHENG WenBao,WANG YiYun,GAO YiMin g,LIN Xin,YANG HuanHuan,LENG QiuFeng,Li XiaoTong,Tang XiaoQian,Fu YanGang.2016.A preliminary study of geological features and metallogenic epoch in Keyue Zn-polymetallic deposit, Tibet[J].Mineral Deposits35(1):33~50
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