东天山维权银铜多金属矿控矿因素及成因分析  

Analysis of Ore-Controlling Factors and Genesis of the Weiquan Silver-Copper Polymetallic Deposit in Eastern Tianshan

作　　者：张仕伟 聂俊杰[1] 高俊宝 周欢[1] 王江朋 ZHANG Shiwei;NIE Junjie;GAO Junbao;ZHOU Huan;WANG Jiangpeng(No.1 Geological Team,Xinjiang Bureau of Geology and Mineral Resources,Changji,Xinjiang 831100;Xinjiang Baodi Mining Co.,Ltd,Urumqi,Xinjiang 830000)

机构地区：[1]新疆维吾尔自治区地质矿产勘查开发局第一地质大队,新疆昌吉831100 [2]新疆宝地矿业股份有限公司,新疆乌鲁木齐830000

出　　处：《地质与勘探》2024年第2期265-276,共12页Geology and Exploration

基　　金：中国地质调查局老矿山深部和外围找矿项目“新疆鄯善县维权银(铜)矿山银铜多金属矿接替资源勘查”(编号:1212011220731);新疆维吾尔自治区重大科技专项“丝路沿线造山带大型矿产资源系统及应用示范”(编号:2021A03001-5);第三次新疆科学考察(编号:2022xjkk1301)联合资助。

摘　　要：维权银铜多金属矿床位于新疆东天山地区,是具有典型特征的大型银铜多金属矿,大地构造划属觉罗塔格沟弧带中的雅满苏岛弧带。该矿床的地质特征、控矿因素、矿床成因长期存在争议。本次研究建立在多年野外地质勘查的基础上,对矿床的地质特征、控矿因素、矿床成因等进行了系统研究,认为银铜、铅锌矿体均分布于火山碎屑岩中,受地层控制的铅锌矿体被断裂构造控制的银铜矿体所切穿;铅锌矿成矿严格受地层层位控制,主要的蚀变类型为矽卡岩化,为接触交代成因类型,成矿时代为早石炭世晚期;银铜矿体形成于晚石炭世中晚期,矿体就位空间为断裂构造,矿体形态明显受断裂形态和性质所控制,有着明显的矿化边界,即断层面,认为其属岩浆期后远程中低温热液成因,成矿晚于铅锌成矿。The Weiquan silver-copper polymetallic deposit,located in the eastern Tianshan region of Xinjiang,is a large polymetallic silver-copper deposit with typical characteristics,and belongs to the Yamansu Island arc zone in the Jueluotage arc zone.The geological characteristics,ore-controlling factors and genesis of the deposit have long been disputed.On the basis of many years of field geological exploration,the geological characteristics,ore-controlling factors and genesis of the deposit were systematically studied.It is concluded that the silver copper and lead-zinc ore bodies are distributed in the pyroclastic rock,and the lead-zinc ore bodies controlled by strata were cut through by the silver copper ore bodies controlled by fault structure.The mineralization of lead-zinc deposit is strictly controlled by stratigraphic position.The main type of alteration is silicification,which is a contact metasomatism type.The lead-zinc deposit was formed in the late of Early Carboniferous.The silver-copper ore body was formed in the middle-late of Late Carboniferous,and the ore body was located in a faulted structure.The silver-copper ore body was obviously controlled by the fault,and there was an obvious mineralization boundary,namely the fault plane.It is believed that the ore body belongs to the remote middle and low temperature hydrothermal origin after the magmatic stage,and the silver-copper mineralization was later than the lead-zinc mineralization.

关 键 词：控矿因素 接触交代 矽卡岩 热液充填 维权银铜多金属矿 东天山 

分 类 号：P612[天文地球—矿床学]