新疆东天山首次发现铅黝帘石  

THE FIRST DISCOVERY OF HANCOCKITE IN EAST TIANSHAN,XINJIANG

作　　者：杨念 刘晓亮 杨刚刚 孟庆鹏 岳蕴辉 YANG Nian LIU Xiaoliang YANG Ganggang MENG Qingpeng YUE Yunhui(Xinjiang Mineral Experiment Research Institute,Urumqi 830000,China Geological Research Academy of Xinjiang ,Urumqi 830000, China)

机构地区：[1]新疆维吾尔自治区地质矿产实验研究所,新疆乌鲁木齐830000 [2]新疆维吾尔自治区地质调查院,新疆乌鲁木齐830000

出　　处：《矿物岩石》2017年第2期1-6,共6页Mineralogy and Petrology

基　　金：中国地质调查局新疆东天山成矿带中段1:5×10~4综合地质调查项目(12120114059201);国土资源公益性行业科研专项(201211043)

摘　　要：新疆东天山发现铅矿化,通过镜下鉴定、X射线衍射和人工重砂分析发现:单偏光下铅黝帘石粒径细小,与斜长石、石英和褐锰矿共生,颜色多样,但均带红色调,以红褐色为主,难以分离出单矿物;电子探针分析结果显示,铅黝帘石中PbO含量变化大,最高为30.90%,最低为10.11%,与其颜色无直接关系。结合野外工作与室内综合鉴定推测该区铅黝帘石为火山热液成因,与构造岩浆活动有关。Pb mineralization in East Tianshan of Xinjiang is analyzed by optical microscopy,X- ray diffraction（XRD） and artificial heavy sand. It reveals that the Pb mineralization occurs in dacite and the Pb mineralization comes from hancockite,which is a new mineralization types and first discovered in Xinjiang. In plane light of microscope,the hancockite occurs as fine grained and coexist with plagioclase,quartz and braunite. Hancockite is of varied color with dominant red to reddish-brown color. The hancockite is difficult to separate into single mineral grain owing to its fine grain size. Electron probe microanalysis （EPMA） shows that the PbO concentrations vary greatly in hancockite,with a maximum content of 30. 90% ,and a minimum of 10. 11% ,and the content is unrelated with the color. Based on the field geological work and comprehensive study,the hancoc- kite is originated from volcanic hydrothermal solution related to tectonic-magmatic activity.

关 键 词：铅黝帘石 东天山 铅矿化 

分 类 号：P572[天文地球—矿物学] P575.1[天文地球—地质学]