辽宁青城子铅锌矿成矿流体特征和成矿物质来源示踪

发布时间：2018-03-11 16:44

  本文选题：青城子铅锌矿　切入点：流体包裹体　出处：《地质与勘探》2017年02期 　论文类型：期刊论文

【摘要】：青城子铅锌矿地处辽东-吉南裂谷带西端,是中国东北地区著名的铅锌矿床,其成矿作用复杂。为了深入揭示该矿床的成矿流体特征和成矿物质来源,本文在对青城子铅锌矿床(喜鹊沟、甸南、本山)地质特征研究的基础上,开展了流体包裹体测温和激光拉曼成分分析,H、O、C、S、Pb同位素分析,并进行了多元同位素体系的综合示踪。青城子铅锌矿床发育富液相包裹体,局部发育H_2O-CO_2三相包裹体。成矿温度范围大,是多阶段成矿作用发展演化的反映(至少两期成矿),成矿温度主要在190℃~310℃之间,应属中温成矿,成矿流体为中温低盐度的水盐流体。激光拉曼成分特征,成矿流体总体属于含CH_4的H_2O-CO_2-NaCl体系,属于还原性流体,具有深源的特征。氢氧同位素结果显示,成矿热液主要来源于岩浆水和大气降水。硫同位素特征表明,矿体中的硫可能主要来自海水硫酸盐的还原。碳氧同位素特征表明,成矿物质可能起源于地层,后期发生岩浆热液改造。铅同位素结果表明,矿石中铅是地层与岩浆岩的混合源铅。
[Abstract]:Qingchengzi lead-zinc deposit is a famous lead-zinc deposit in northeast China, which is located at the western end of Liaodong-South Jilin rift belt, and its metallogenic process is complicated. In order to reveal the ore-forming fluid characteristics and the source of ore-forming material, Qingchengzi Pb-Zn deposit is a famous Pb-Zn deposit in northeast China. Based on the study of geological characteristics of Qingchengzi lead-zinc deposit (Magiegou, Diannan, Benshan), fluid inclusion temperature measurement and laser Raman composition analysis have been carried out in this paper. Comprehensive tracer of multicomponent isotopic system has been carried out. Liquid rich inclusions are developed in Qingchengzi lead-zinc deposit and H2O-COJ _ 2 three-phase inclusions are locally developed. The metallogenic temperature range is wide. It is a reflection of the development and evolution of multistage metallogeny (at least two stages of mineralization). The ore-forming temperature is mainly between 190 鈩，

本文编号：1599020