黔西南泥堡金矿床硒元素地球化学特征与意义  

Geochemical characteristics of Se in the Nibao gold deposit in the Southwestern Guizhou and their significances

作　　者：徐良易 刘建中 李应辉[1] 郑禄林 李俊海[1,3] 王泽鹏[1,3] 杨成富[1,3] 陈发恩[1,3] 王大福[1,3] 宋威方 XU Liang-yi;LIU Jian-zhong;LI Ying-hui;ZHENG Lu-lin;LI Jun-hai;WANG Ze-peng;YANG Cheng-fu;CHEN Fa-en;WANG Da-fu;SONG Wei-fang(No.105 Geological Team,Bureau of Geology and Mineral Exploration and Development of Guizhou Province,Guiyang 550018,China;Bureau of Geology and Mineral Exploration and Development of Guizhou Province,Guiyang 550004,China;Technology Innovation Center of Mineral Resources Explorations in Bedrock Zones,Ministry of Natural Resources,Guiyang 550081,China;College of Resources and Environmental Engineering,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州省地质矿产勘查开发局105地质队,贵州贵阳550018 [2]自然资源部基岩区矿产资源勘查工程技术创新中心,贵州贵阳550081 [3]贵州省地质矿产勘查开发局,贵州贵阳550004 [4]贵州大学资源与环境工程学院,贵州贵阳550025

出　　处：《矿物学报》2022年第1期95-105,共11页Acta Mineralogica Sinica

基　　金：国家自然科学基金项目(编号:U1812402,41802088);国家重点研发计划项目(编号:2017YFC0601500)。

摘　　要：泥堡金矿床微量元素的聚类分析与因子分析结果显示,Au、As、Sb、Hg、Tl、Ag、W、Se相关性好,表明Se与Au在成矿作用过程中可能具有密切联系,硒化物主要出现在浅成低温热液矿床或成矿的中晚阶段。泥堡金矿床Au成矿温度集中于180~260℃,表明泥堡金矿床中Se可能主要以硒化物的形式存在。黔西南地区不同金矿床的黄铁矿、毒砂、辉锑矿、辰砂、雄黄等硫化物中,Se具有一定的富集,Se与S的地球化学性质相似,Se主要以置换硫化物中的S的形式存在。成矿过程中HS-和HSe-均可作为卡林型金矿中Au的载体,Se能为研究该区乃至贵州黔西南地区卡林型金矿中Au成矿环境、成矿机制及成矿流体演化规律提供间接性证据,提出Se可作为黔西南地区卡林型金矿床找金的指示元素。The R-cluster analysis and Factor analysis of trace elements in ores of the Nibao gold deposit show that Au, As, Sb, Hg, Tl, Ag, W, and Se are in good correlation with each other, indicating that Se may have some close connections with Au in the gold mineralization process of the Nibao gold deposit. The selenide occurred mainly in epithermal deposits or the middle to late ore-forming stages. The ore-forming temperatures, varying from 180℃ to 260℃, of the Nibao gold deposit indicate that Se may be primarily existed in the form of selenide in the Nibao gold deposit. Se is generally enriched in a certain degree in sulfides, such as pyrite, arsenopyrite, stibnite, cinnabar, and realgar etc, in different gold deposits in the southwestern Guizhou. It is characterized with similar geochemical properties of S, and is mainly existed in the form of substituting S in the lattice of sulfide. HS-and HSe-could be carriers of Au in the ore-forming process of the Carlin-type gold deposits. Geochemical data of Se can be used as indirect evidences to study the gold ore-forming environment, ore-forming mechanism, and ore-forming fluid evolution law of the Carlin-type gold deposits in the southwestern Guizhou. It is proposed that Se can be used as one of the indicator elements for prospecting the Carlin-type gold deposits in the southwestern Guizhou.

关 键 词：泥堡金矿床 金 硒 黔西南 

分 类 号：P595[天文地球—地球化学] P618.51[天文地球—地质学]