黔东南从江翁浪金矿床矿物特征及金的赋存状态研究.doc

黔东南从江翁浪金矿床矿物特征及金的赋存状态研究 【中文摘要】本文在前人工作的基础上,采用矿相鉴定、化学分析、单矿物试金分析、电子探针及X射线衍射等多种物理化学分析手段,对翁浪金矿床矿物特征及金的赋存状态做了细致的微观分析研究。首次在该区找到了辉银矿、白铅矿、伊利石、独居石矿物。同时还发现,硫化物均具有亏硫的特点,说明他们的形成时处于低硫逸度环境;独居石具有热液阶段形成的特点。通过综合整理将矿床成矿作用过程划分为热液成矿期和表生期两个成矿期,其中热液期进一步划分为三个阶段,同时还对矿物天生顺序和共生关系进行了研究。金在矿石中主要以银金矿的形式存在,其次为金银矿,粒度一般1.5～62μm,多为港湾状、长条状、蠕虫状和不规则状嵌布于载金矿物粒隙或晶隙间。金成色偏低,部分金矿物还含有一定量汞,反映其浅成、低温环境形成的特点。载金矿物主要是黄铁矿,而磁铁矿的含金性差。; 【Abstract】 Based on the predecessors\ work,many chemical and physical s,such as ore microscopy, chemical analysis,gold analysis of individual mineral,electronic probe X-Ray microanalysis and X-Ray diffract analysis,have been applied to the study of the mineral characteristics and the mode of gold occurrence of gold in the wenglang gold deposit.Argentite,cerusite,illite and monazite are funded in this area for the first time.At the same time all of the sulfide have the same character of fall short of sulfur.It show that they ed in low sulfur environment.There are two matellogenic periods hydrothermal period and su***ce oxidizing activity period.Hydrothermal period is the main endogenetic period,which is composed of three mineralization stages.In the same time,the mineral arisen sequence and the relation of mineral intergrowth are studied.Electrum is the mostly ation of gold in this deposit.Bullion is the second one.The gold granularity commonly between 1.5μm to 62μm.The configuration of them are fleet,strip,worm and erose.They are enwrapped in the crystal cranny or grains gaps of gold-bearing minerals,the purity of gold is lowly,and some of them contain a little of Hg,reflect that the gold mine ed in low temperature and superficial parties.The main gold-bearing minerals is pyrite.The gold\s percentage composition of magnetite is low.