滇东南薄竹山地区大型多金属矿床控矿因素对比研究  

A Comparative Study on Ore-Controlling Factors of Large-Scale Polymetallic Ore Deposits in Bozhushan Area of Southeast Yunnan

作　　者：张亚辉[1] 张世涛[1] 刘红卫 

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093 [2]云南省国土规划院,云南昆明650212

出　　处：《昆明理工大学学报（自然科学版）》2012年第6期1-7,共7页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(619220090006)

摘　　要：薄竹山地区是文山-个旧-富宁钨、锡、银、铅、锌等多金属成矿带的重要组成部分,产有大小各类金属矿床20余个.其中白牛厂银多金属矿床和官房钨多金属矿床是该区较为典型的超大型、大型矿床,分别位于薄竹山花岗岩体北西部和南西部.两个矿床的成矿母岩及围岩的岩石学及岩石地球化学、控矿构造特征表明,两个矿床花岗岩均为过铝质S型,但前者形成于晚阶段拉张环境,后者形成于早阶段挤压环境;官房矿区花岗岩及赋矿地层中明显富集钨,白牛厂矿区花岗岩及赋矿地层中明显富集银,是导致形成主要矿种和矿床类型不同的原因;两个矿区控矿构造及矿体形成机制差异,导致官房矿床产于花岗岩内接触带,属高温热液矿床;白牛厂矿床产于外接触带,属中-低温热液矿床.Bozhushan mining area in southeastern Yunnan is an important part of tungsten,tin,silver,lead and zinc metallogenic belt across Wenshan-Gejiu-Funing counties,where there are more than 20 big and small polymetallic deposits of various types,of which Bainiuchang Ag polymetallic deposit and Guanfang tungsten polymetallic deposits are typical super large-scale or large-scale ones.They are located respectively in the northwest and southwest of the granite in Bozhushan Area.Analyses of the mineralization parent rocks and wall rocks,the petrology,petrogeochemistry and ore-controlling structural characteristics of the two deposits indicate that the granites of the two deposits are of peraluminous S-type granites.The former was formed in extension environment in late stage,while the later was formed in compression environment in early stage.Enrichment of tungsten is found in the granites and host strata of Guanfang mining area while enrichment of silver is found in those of Bainiuchang mining area,which lead to their differences in the formation of the main mineral species and of the deposit types.The dramatic differences of formation mechanism and ore controlling structures between the two mining areas result in the fact that Guanfan deposit was formed in the internal contact belt and is a kind of hypothermal deposit,while Bainiuchang deposit was formed in the external contact belt and is a kind of mesothermal or epithermal deposit.

关 键 词：银多金属矿床 钨多金属矿床 花岗岩 薄竹山地区 蒙自白牛厂 文山官房 

分 类 号：TD11[矿业工程—矿山地质测量]