江西见龙铜钨矿床成矿流体特征及成因机制  

Fluid Characteristics and Genetic Mechanism of Jianlong Cu-W Deposit in Jiangxi Province

作　　者：杨斌[1] 刘翠辉 赵磊[1] 鲁捷 莫火华 谭友 YANG Bin;LIU Cuihui;ZHAO Lei;LU Jie;MO Huohua;TAN You(Gannan Geological party,JBED GMR,Ganzhou 341000,Jiangxi,China)

机构地区：[1]江西省地质矿产勘查开发局赣南地质调查大队,江西赣州341000

出　　处：《中国钨业》2020年第5期70-78,共9页China Tungsten Industry

基　　金：中国地质调查局项目(DD2016005206)。

摘　　要：见龙铜钨矿床是位于江西兴国县境内的石英脉型矿床。矿体产于燕山期花岗质侵入体的内外接触带中,主要矿化类型为石英脉型。本研究在详细的野外地质调查和矿床地质研究基础上,对见龙铜钨矿床开展了流体包裹体研究。结果显示:见龙铜钨矿床主要经历了两期成矿流体活动,成矿流体具有中低温、低盐度特征,流体包裹体中水的δ18OH2O值为-0.96‰^-3.35‰,δDV-SMOW值为-61.6‰^-82.2‰,成矿流体主要来源于岩浆水与大气降水的混合。流体包裹体特征表明:成矿早期的流体不混熔和晚期的流体混合可能是见龙石英脉型铜钨矿床矿质沉淀的主要机制。Located in Jiangxi Province,Jianlong copper-tungsten deposit is a quartz vein type deposit.The ore bodies occur in the inner and outer contact zones of Yanshanian granitic intrusions,with the main mineralization type characteristic of quartz vein.On the basis of detailed field geological survey and deposit geological study,we carried out an investigation into the fluid inclusions of the copper tungsten deposit.The results show that the deposit has experienced two stages of ore-forming fluid activities.The ore-forming fluid has the characteristics of medium low temperature and low salinity.Theδ18OH2O values of the inclusions in quartz range from-0.96‰to-3.35‰,andδDV-SMOW values of quartz from-82.2‰to-61.6‰,suggesting that the ore-forming fluid was mainly derived from the mixed meteoric water and magmatic water.The characteristics of fluid inclusions indicate that the immiscibility in the early stage and the mixing in the late stage may be the main mechanism of mineral precipitation in the Jianlong Cu-W deposit.

关 键 词：铜钨矿床 成矿流体 成因机制 见龙 

分 类 号：TD164.2[矿业工程—矿山地质测量] P167[天文地球—天文学]