赣西蒙山地区多金属-非金属矿床成矿流体性质与成矿物质来源分析  

Analysis of Ore-Forming Fluid Properties and Ore-Forming Material Sources of Polymetallic-Nonmetallic Deposits in the Mengshan Area of Western Jiangxi Province

作　　者：熊钟 张缓缓 XIONG Zhong;ZHANG Huanhuan(Energy Geology Brigade,Jiangxi Bureau of Geology,Nanchang 330200,China)

机构地区：[1]江西省地质局能源地质大队,南昌330200

出　　处：《中国资源综合利用》2023年第11期85-89,100,共6页China Resources Comprehensive Utilization

摘　　要：为揭示赣西蒙山地区多金属-非金属矿床成矿流体性质与成矿物质来源,本文以石竹山矿床为例,对与矿化有关的石英、方解石、石榴子石、矽卡岩进行流体包裹体岩相学分析、流体包裹体测温与C、O同位素分析,深入研究矿床的成因。分析结果显示,矿床中的包裹体大小不均,存在单相、两相和三相,并以单相和两相为主。流体包裹体均一温度为132.7~229.0℃,集中在140~180℃;以NaCl为评价指标,盐度介于0.17%~7.72%,集中在0%~4%,它属于低温、低盐度成矿流体,在成矿过程中,流体发生沸腾作用。矿床成矿流体主要为碳酸盐溶解作用形成的变质水,成矿物质来源于碳酸盐岩。矿床主要属于低温-中高温热液矿床,成矿物质沉淀的主要机制为流体的多次沸腾加上流体的混合。In order to reveal the ore-forming fluid properties and the ore-forming material sources for polymetallicnonmetallic deposits in the Mengshan Area of Western Jiangxi Province,taking the Shizhushan deposit as an example,this paper conducts fluid inclusion petrographic analysis,fluid inclusion temperature measurement,and C and O isotope analysis on quartz,calcite,garnet,and skarn related to mineralization,and deeply studies the genesis of the deposit.The analysis results show that the size of inclusions in the deposit is uneven,with the presence of single-phase,two-phase,and three-phase,mainly consisting of single-phase and two-phase.The homogenization temperature of fluid inclusions is 132.7~229.0℃,concentrated at 140~180℃;using NaCl as the evaluation indicator,the salinity is 0.17%~7.72%,concentrated at 0%~4%,it belongs to a low-temperature and low salinity ore-forming fluid,and boiling occurs during the ore-forming process.The ore-forming fluid of the deposit is mainly metamorphic water formed by carbonate dissolution,and the ore-forming material comes from carbonate rocks.The ore deposit mainly belongs to low-temperature to medium high temperature hydrothermal deposits,and the main mechanism of ore-forming material precipitation is the multiple boiling and mixing of fluids.

关 键 词：多金属-非金属矿床 流体包裹体 成矿流体 C、O同位素 

分 类 号：P618.63[天文地球—矿床学]