新疆库米什地区忠宝钨矿矿床地质特征及成因研究  

Geological Characteristics and Genesis of the Zhongbao Tungsten Deposit in the Kumishi Area,Xinjiang,China

作　　者：陈超[1] 吕新彪[1,2] 吴春明[2] 李鹏 曹晓峰[1] 朱江[1] 

机构地区：[1]中国地质大学资源学院,武汉430074 [2]中国地质大学地质调查研究院,武汉430074 [3]西部矿业集团有限公司,西宁810001

出　　处：《矿物岩石地球化学通报》2013年第4期445-455,共11页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金："十一五"国家科技支撑计划重点资助项目(2007BA25B04)

摘　　要：对新疆库米什地区忠宝钨矿矿床地质特征进行了总结,并根据不同成矿阶段矿物流体包裹体测试及成矿期石英氢氧同位素组成探讨了矿床成矿物理化学条件及物质来源。研究表明,矿体产于二云母二长花岗岩体与下泥盆统阿尔彼什麦布拉克组含钙质围岩的接触带部位,后期叠加云英岩及石英脉型矿化,成矿受矿区岩体、围岩及构造共同控制。流体包裹体研究显示矿床形成于中-高温度(250～360℃)、高盐度(12%～15%)、中浅深度(2.7～4.0km),成矿压力为(275～418)MPa。氢氧同位素组成则表明成矿流体主要来自深部岩浆水,可能有少量演化大气降水加入。认为忠宝钨矿为典型的矽卡岩型白钨矿床,并结合矿床地质特征及成因认识对其成因模式进行了总结。We summarized the geological characteristics of the Zhongbao tungsten deposit in the Kumishi area and discuss the metallogenic physicochemical condition and ore-forming fluid source according to the fluid inclusions researches in different mineralization stages and hydrogen and oxygen isotopes compositions of quartz in the mineralization stage.It showed that the orebodies were formed in the contact zones of the two mica-monzogranite bodies and were superimpose by arpishmebulaq calcium-bearing formation and by greisen and quartz vein-type mineralization,which were both jointly controlled by granite bodies,wall rocks and structures of Mining areas.Fluid inclusion studies revealed that the p-t conditions of the deposit are high to middle temperature（250~360℃）,high salinity（12%~15%）,middle depth（2.7~4 km） and relatively high pressure（275×105~418×105 Pa）.O and H isotopic compositions indicated the ore-forming fluids derived from the deep magmatic water mixed with a little of the evolutionary atmospheric water.We believed that the Zhongbao tungsten deposit is the typical skarn-type scheelite deposit.We also established the mineralization modle according to the geological characteristics and genesis of the deposit.

关 键 词：新疆 忠宝钨矿 矿床地质特征 矿床成因 

分 类 号：P618.67[天文地球—矿床学]