新疆巩留喀拉台齐铅银矿地质特征及成因分析  

The Geological Characteristic and Cause Analysis of Kalataiqi Pb-Ag Depositin Gongliu,Xingjiang

作　　者：郑勇[1] 孙文[1] 郭新成[1] 颜松林 梁宇轩 杨阳[1] 宁显贵 

机构地区：[1]新疆维吾尔自治区地质矿产勘查开发局第十一大队,新疆昌吉831100 [2]长安大学地球科学与国土资源学院,陕西西安710054

出　　处：《新疆地质》2014年第2期194-198,共5页Xinjiang Geology

基　　金：新疆地质勘查中央专项资金项目(ZYZXKC2009-5)资助

摘　　要：喀拉台齐铅银矿产于下二叠统乌郎组玄武岩、玄武安山岩、流纹岩中,位于古火山机构东侧环状、放射状断裂中及附近。矿化热液多沿张裂隙灌入,矿体呈脉状、不规则囊状、似层状。围岩蚀变主要有碳酸盐化、弱硅化、弱绢云高岭土化及褐铁矿化、黄铁矿化、孔雀石化。矿石构造呈角砾状、细脉状、网脉状、浸染状等。方解石中包裹体为富液相气液两相包裹体,气相百分数为15%-25%,包裹体均一温度平均为300.82℃,盐度平均为7.89%,密度平均为0.79 g/cm3。石英包裹体氢、氧同位素δ18OV-SMOW=9.9‰-11.1‰,δDV-SMOW=-133.9‰-154.3‰,δ18OH2O为2.98‰-4.17‰。成矿溶液流体来自雨水。矿床成因属与陆相火山气液作用有关的浅成低温热液矿床。The kalataiqi lead-silver mine formed in basalt,basaltic andesite,rhyolite of Lower Permian Wulang Formation,which formed in or nearby ringlike and radial fracture that eastern part of palevolcano,mineralization hydrothermal solution have injected extension fracture.The ore body are often in shapes of nervation,irregular and stratiform-like.Wall rock alterations are mainly carbonatization,feeble-siliconization,feeble-sericitization, kaolinization and ferritization,pyritization malachitization.fine-grained of ore shows blocks-like,fine veinule,disseminated and fractured.The inclusion of calcite amongst ore shows that average temperature of homogenization method is 300.82℃.The average salinity is 7.89 wt%NaCl eq.The average density is 0.79 g/cm3.The composition of H and O in quartz are betweenδ18OV- SMOW=9.9‰~11.1‰,δDV-SMOW=-133.9‰~δ18OH2O=2.98‰~4.17‰,the ore-forming fluid is from rain.The genetic type of mineral deposit belong to epithermal deposit that was related to volcanogenic ore-forming process.

关 键 词：巩留 喀拉台齐铅银矿 地质特征 成因分析 

分 类 号：P618.42[天文地球—矿床学] P618.52[天文地球—地质学]