与热液成矿有关的金矿床直接定年方法综述  

Direct dating methods of gold deposits associated with hydrothermal mineralization

作　　者：王斌[1,2] 邹依林[1] 朝银银[1] 杨玉霞[1] 

机构地区：[1]中国人民武装警察部队黄金地质研究所 [2]中国科学技术大学地球和空间科学学院

出　　处：《黄金》2013年第4期8-13,共6页Gold

基　　金：西部地区重要金属矿产资源调查评价项目(1212011220665)

摘　　要：厘定矿床的形成时代对于正确认识矿床的成因、了解成矿机制和控矿因素以及掌握成矿规律并指导进一步找矿勘查具有重要意义。与热液有关的金矿床由于成矿热液来源的复杂性以及多期性,确定其矿化发生的年代一直是矿床学研究中的难点。对与热液金矿成矿同时形成的单矿物甚至载金矿物进行同位素直接定年,能够得到与热液成矿有关的金矿床的形成年代。对于单个矿床而言,应该根据相应的成岩成矿地质背景选择合适的定年矿物以及放射性同位素定年体系进行成矿年代的测定,得到具有地质意义的成矿年龄。在前人研究的基础上,对当前确定与热液成矿有关的金矿床成矿时代中应用最广泛有效的几种定年方法技术进行简要评述。It is important to determine deposit formation era before such knowledge as deposit genesis, metallogen- ic mechanism, ore-controlling factors, and ore-forming regularities are learned to guide further mineral exploration. Due to the complexity and multi-phase formation nature of the ore-forming hydrothermal sources, metallogenic dating of the gold deposits associated with hydrothermal fluids has been a difficult part in ore mineralogy study. Direct dating of the single minerals or even gold-bearing minerals that formed at the same time of hydrothermal gold deposit formation can get the forming date of the gold deposit. For single deposit, it is proper to choose the dating minerals and the radioiso- tope dating system both fit for the metallogenic geological settings to get the geologically meaningful metallogenic age. Based on the previous studies, the paper made a brief review on several most widely applied dating methods in deter- mining metalloge^ic date of gold deposit associated with hydrothermal fluids.

关 键 词：热液金矿 直接定年 成矿时代 流体包裹体 锆石 黄铁矿 辉钼矿 

分 类 号：P597[天文地球—地球化学] TD11[天文地球—地质学]