新疆乌恰县乌拉根新生代热卤水喷流沉积铅锌矿成因研究  

THE GEOLOGICAL CHARACTERISTICS AND GENESIS OF WULAGEN HOT BRINE EXHALOGENE LEAD-ZINC DEPOSIT OF CENOZOIC ERA,WUQIA COUNTY,XINJIANG

作　　者：谢世业[1] 莫江平[1] 杨建功[2] 杨金明 

机构地区：[1]桂林矿产地质研究院地研所,广西桂林541004 [2]有色地质资料馆,北京065201 [3]新疆鑫汇地质矿业有限责公司,新疆乌鲁木齐830011

出　　处：《矿产与地质》2003年第1期11-16,共6页Mineral Resources and Geology

基　　金：国家地质调查资助项目(编号:200110200063)

摘　　要：乌拉根铅锌矿床是新生代热卤水喷流沉积矿床,矿化分布于下第三系古新统乌拉根组第一、二岩性段,矿石结构构造兼有同生沉积及叠加改造特征,围岩蚀变为黄铁矿化、天青石化、石膏化及白云石化。通过研究表明:成矿物质铅锌来自地壳深部或上地幔,硫主要来自海水硫酸盐的还原;成矿温度为64～193℃;成矿流体盐度7.22%～20.29%WtNaCl;成矿年龄45.4～54.0Ma。指出成矿作用经历了三个时期:a、热卤水喷流沉积成矿期;b、热卤水喷溢叠加成矿期;c、表生氧化淋滤富集期。Wulagen lead-zinc deposit is Cenozoic era hot brine exhalogene deposit. The ore band is Wulagen formtion,Paleomorphology,Early Tertiary system. Both of syndepositional structure and the overprint ones are seen in the ore. The wall-rock alterations consist of pyritization, celestitization, gypsification, and dolomitization. The study of ore isotope proves that the leadzinc were delivered from deep crust and the sulfur was from the reduction of sulphates in the sea. The mineralizing temperature is 64℃~193℃. The saltness of the mineralizing fluid is 7.2%-20.29%(Wt NaCl). The metallogenetic time is 45.4~54.0 Ma The mineralizing process consist of hot brine exhalogene stage, the hot brine spout stage and the supergene oxidized enrichment stage.

关 键 词：矿床学 铅锌矿 成因 热卤水 喷流沉积 新疆乌恰县乌拉根 

分 类 号：P618.420.1[天文地球—矿床学] P618.430.1[天文地球—地质学]