西准噶尔地区阔尔真阔腊金矿床金的赋存状态研究  

Occurrence state of gold in Kuoerzhenkuola gold deposit, west Junggar

作　　者：杨治 邓宇峰[1,2,3] 袁峰 周涛发[1,2,3] 许超 张达玉[1,2,3] YANG Zhi;DENG Yufeng;YUAN Feng;ZHOU Taofa;XU Chao;ZHANG Dayu(School of Resources and Environmental Engineering,Hefei University of Technology,Hefei 230009,China;Ore deposit and Exploration Center,Hefei 230009,China;Anhui Province Engineering Research Center for Mineral Resources and Mine Environments,Hefei 230009,China)

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009 [2]矿床成因与勘查技术研究中心,安徽合肥230009 [3]安徽省矿产资源与矿山环境工程技术研究中心,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2019年第9期1258-1263,共6页Journal of Hefei University of Technology：Natural Science

基　　金：国家科技支撑计划资助项目(2011BAB06B01);国家自然科学基金资助项目(41672069;41303031);中央高校基本科研业务费专项资金资助项目(2013bhzx0015)

摘　　要：阔尔真阔腊金矿床位于新疆准噶尔盆地北西缘萨吾尔成矿带东段。文章通过对野外岩石样品肉眼观察与镜下鉴定,发现阔尔真阔腊金矿床中金属矿物主要为银金矿、黄铜矿、黄铁矿、方铅矿、闪锌矿和毒砂等;脉石矿物主要为石英、方解石及钾长石等;主要载金矿物为黄铁矿,其次为毒砂。对矿石成矿元素化学分析发现,金矿石中Au与As、Cu、Pb呈正相关关系,金与毒砂密切共生说明流体中As的存在可能加大了Au的溶解度。通过电子探针分析金的赋存状态,观测到阔尔真阔腊金矿床金矿物主要以裂隙金、粒间金2种状态产出,并以裂隙金为主,表明该地区金矿的沉淀可能受构造控制作用较大;在毒砂中发现金以粒间金和裂隙金2种形式赋存于同一毒砂颗粒中,推测该矿床可能存在两期金的沉淀事件。The Kuoerzhenkuola gold deposit is located in the eastern part of Sawuer metallogenic belt in the northwestern margin of the Junggar Basin,Xinjiang.With visual observation of the specimens and microscopic identification of thin sections,it is found that the main metallic minerals in the Kuoerzhenkuola gold deposit are electrum,chalcopyrite,pyrite,galena,sphalerite and arsenopyrite;and the gangue minerals are quartz,calcite and potassium feldspar.The main gold-bearing mineral is pyrite,followed by arsenopyrite.The chemical analysis of ore-forming elements shows that Au is positively correlated with As,Cu and Pb in the gold ores.Moreover,the close spatial relationships between Au and arsenopyrite suggest that the existence of As may increase the solubility of Au in the ore-forming fluids.Based on the analysis of the gold occurrence status by electron probe,it is observed that the gold minerals are mainly distributed in the ores in forms of fissure gold and intergranular gold,the former is more common than the later,suggesting that the precipitation of gold in this deposit may be controlled by fractures.Because the intergranular gold and fissure gold occur in the same arsenopyrite crystal,it is speculated that there may be two gold precipitation periods in this deposit.

关 键 词：阔尔真阔腊金矿床 电子探针 黄铁矿 银金矿 金的赋存 

分 类 号：P611.11[天文地球—矿床学]