岩石矿物学杂志2018，Vol.37Issue(2)：281-295,15.
湘东南太和仙铅锌矿床流体包裹体研究
Fluid inclusion study of the Taihexian Pb-Zn deposit, southeast Hunan Province
摘要
Abstract
The Taihexian Pb-Zn deposit is located in southeastern Hunan Province.In order to understand its fluid properties and evolution and discuss its metallogenic mechanism,the authors conducted field investigation and analyzed the ores of different metallogenic phases by such means as fluid inclusion petrography,microthermometry and laser Raman microprobe.The results reveal the existence of three ore-forming stages in the Taihexian Pb-Zn deposit,characterized by vein cutting relation and mineral assemblages of quartz-pyrite-arsenopyrite (the early stage),quartz-Pb-Zn polymetallic sulfides (the middle stage) and quartz-calcite-pyrite.Four main types of fluid inclusions were distinguished in the hydrothermal quartz,i.e.,liquid-rich inclusions (type Ia),vapor-rich inclusions (type Ⅰb),carbon-aqueous two-phase inclusions (type Ⅱ),and carbon-aqueous three-phase inclusions (type Ⅲ).Microthermometic data show that the homogenization temperatures of the fluid inclusions from the early stage to the late stage are gradually decreased,from 235 ～ 349℃,through 159 ～ 272℃ to 128 ～ 205℃,with the corresponding salinities being 2.03％ ～7.44％,1.39％ ～ 10.86％,and 1.39％ ～7.58％.Raman microspectroscopic studies of the fluid inclusions show that the main component of aqueous inclusions in quartz-pyrite-arsenopyrite,quartz-Pb-Zn polymetallic sulfides and quartz-calcite-pyrite is H2O,followed by CO2,with a little reducing gas CH4 and N2.The metals precipitation resulted from fluid immiscibility caused by CO2 escaping at the early stage,fluid mixing caused by meteoric water and interlayer water at the middle stage and natural cooling of fluid system at the late stage.关键词
流体包裹体/成矿机制/铅锌矿床/湘东南太和仙Key words
fluid inclusion/metallogenic mechanism/Pb-Zn deposit/Taihexian, southeast Hunan分类
天文与地球科学引用本文复制引用
言奇,邵拥军,熊伊曲,伍式崇,朱浩锋,程路平..湘东南太和仙铅锌矿床流体包裹体研究[J].岩石矿物学杂志,2018,37(2):281-295,15.基金项目
中南大学“创新驱动项目”(2015CX008) （2015CX008）
中南大学研究生创新项目(2016zzts082) （2016zzts082）
中国地质调查局整装勘查项目(12120114052101) Project of Innovation-driven Plan in Central South University(2015CX008) （12120114052101）
Project of Innovation Foundation for Postgraduate in Central South University(2016zzts082) （2016zzts082）
China Geological Survey Integrated Exploration Project(12120114052101) （12120114052101）
