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扎西康锌多金属矿床位于西藏特提斯喜马拉雅板片的“金锑多金属”成矿带东段。研究显示,矿体主要呈脉状、透镜状产于近南北向的张性断裂中。热液成矿作用主要可划分为早、晚2个成矿阶段,7个成矿亚阶段,早期以铅锌矿化为主,晚期以锑(铅)矿化为主。岩矿石镜下鉴定和电子探针分析表明,扎西康矿床矿石种类繁多,矿物组合和成矿元素均呈现明显的分带现象,由深至浅(W→E)为含锡(铁)闪锌矿+铁锰碳酸盐+少量方铅矿+少量黄铜矿(深部)→(铁)闪锌矿+铁锰碳酸盐+少量方铅矿+黄铁矿+毒砂+少量银黝铜矿+少量石英(中深部)→方铅矿+闪锌矿+脆硫锑铅矿+铁锰碳酸盐+硫锑铅矿+少量银黝铜矿+石英(中部)→辉锑矿+方铅矿+少量闪锌矿+石英+少量铁锰碳酸盐(浅部),对应的元素分带为Zn(Pb+Ag+Cu+Sn)→Zn(Pb+Ag)→Zn+Pb(Sb+Ag)→Pb+Sb+Ag+Zn。矿区银矿化主要集中在Ⅴ号矿体ZK2703-ZK2302、ZK1502-ZK1105和ZK806三个区域,与铅锑矿化关系密切。矿石中银主要以类质同象的形式存在,独立银矿物相对较少。其中,类质同象银主要赋存在方铅矿中,少量赋存在硫锑铅矿、脆硫锑铅矿、毒砂、黄铁矿等金属硫化物中;独立银矿物有少量的银黝铜矿、硫锑铅银矿、银(含银)硫铜锑矿。成矿流体中铅、锌、锑、银的运移和富集沉淀是受体系中温度、压力、浓度、pH值等多种因素综合控制的结果。
Zhaxi Kang Zinc polymetallic deposits located in Tibet Tethys Himalayan plate “gold antimony polymetallic ” metallogenic belt east. Research shows that the ore body is mainly vein-shaped and lenticular to produce near-north-north tensile fractures. The hydrothermal mineralization can be divided into two stages of early and late ore-forming stages and seven metallogenic sub-stages, mainly lead and zinc mineralization in the early stage, and antimony (lead) mineralization in the late stage. The microscopic identification and electronic probe analysis of rock ores show that there are many kinds of ores in the Zhaxikang ore deposit, and the mineral assemblages and metallogenic elements show obvious zonation. From W to E, the tin (iron) sphalerite + Iron + manganese carbonate + a small amount of galena + a small amount of chalcopyrite (deep) → (iron) sphalerite + ferromanganese carbonate + a small amount of galena + pyrite + arsenopyrite + a small amount of silver tetraoxide Ore + a small amount of quartz (middle deep) → galena + sphalerite + jasperite + ferromanganese carbonate + stibnite + a small amount of silver tetrahedrite + quartz (central) → stibnite + side Pb + Ag + Cu + Sn + Pb + Ag + Zn + Pb (Sb) + Ag) → Pb + Sb + Ag + Zn. The silver mineralization in the mining area mainly concentrates in the three areas of ore body Z, ZK2703-ZK2302, ZK1502-ZK1105 and ZK806, which is closely related to the lead-antimony mineralization. Ore is mainly present in the form of isomorphism with relatively few independent silver minerals. Among them, the silver of the isomorphism mainly exists in the galena, and a small amount exists in the metal sulfides such as stibnite, jamesonite, arsenopyrite, and pyrite. A small amount of silver tetrachloride Mine, antimony lead silver, silver (silver) sulfur copper antimony ore. The migration and enrichment of lead, zinc, antimony and silver in ore-forming fluids are the result of comprehensive control of many factors such as temperature, pressure, concentration and pH in the system.