滇西铜厂沟斑岩钼铜多金属矿床矿石矿物特征及成因  

Metallogenic Geological Condition and Comprehensive Prospecting Model of the Porphyry Mo-Cu Deposit in Western Yunnan Province

作　　者：袁丽香 梁宇航 YUAN Lixiang;LIANG Yuhang(Yunnan Copper Mineral Resources Exploration Development Co.,Ltd.)

机构地区：[1]云南铜业矿产资源勘查开发有限公司,云南省昆明市650051

出　　处：《现代矿业》2022年第5期30-33,共4页Modern Mining

摘　　要：铜厂沟斑岩铜钼矿床位于扬子地块、甘孜—理塘结合带和格咱岛弧的交接部位,是属盐源—丽江中生代台缘凹陷多金属成矿带的产物。采用镜下鉴定及电子探针方法对铜厂沟钼铜多金属矿床矿石矿物进行研究,发现矿床的主要金属硫化物为辉钼矿、黄铜矿及黄铁矿。结合矿床地质特征、矿物组构特征及矿化类型,认为矿床可划分为接触变质、矽卡岩、矽卡岩退化及石英硫化物4个成矿阶段,构成热接触变质(方解石)—热液成矿早期(透辉石、石榴子石)—热液成矿晚期(绢云母、绿帘石)—金属硫化物发育阶段(辉钼矿、黄铜矿、黄铁矿)的成矿期次。岩浆热液及成矿流体自深部携成矿元素沿拉巴河断裂运移侵位,有利的构造环境及强烈的岩浆作用构成了铜厂沟斑岩铜钼矿床的成矿要素,矿床属矽卡岩—热液脉型成因多金属矿床。Tongchanggou porpory Cu-Mo deposit is located in intersection part of Yangtze Block,Ganzi-Litang junction zone and Geza island arc, which belongs to a production of Yanyuan-Lijiang polymetallic metallogenic belt during Mesozoic era.The characteristics of the major minerals in the Tongchanggou Mo-Cu polymetallic deposit are analyzed through the application of microscope and electron probe. It is found that the main metal sulfides include molybdenite,chalcopyrite and pyrite.According to the geological characteristics of deposit,mineral fabric and mineralized types,the metallogenic process can be divided into contract metamorphic stage,skarn stage,skarn degradation stage and quartz-sulphide stage,which consisted of thermal contact metamorphism(calcite), early hydrothermal mineralization(diopside, garnet),late hydrothermal mineralization(sericite, epidote),metal sulfide development stage(molybdenite, chalcopyrite, pyrite).Magmatic hydrothermal fluid and ore-forming fluid carried ore-forming elements from deep migration and emplacement along Laba River fault.Favorable tectonic environment and strong magmatism constituted the ore-forming elements of Tongchanggou porphyry Cu-Mo molybdenum deposit, which belongs to skarn-hydrothermal vein type polymetallic deposit.

关 键 词：钼铜矿床 矿床地质特征 矿物特征 成矿阶段 

分 类 号：P618.2[天文地球—矿床学]