内蒙古东升庙矿区深部矿石成分分析

Analysis on Deep Ore Composition of Dongshengmiao Mining Area,Inner Mongolia

为了深入了解东升庙矿区的矿床地质特征,完善矿区的地质背景,通过采集硫多金属矿床的深部矿石样品,并用电子探针波谱仪对矿石的成分进行探讨和分析。试验结果表明:东升庙矿区深部矿体主要以硫化物形式赋存,由黄铁矿、方铅矿、闪锌矿、磁黄铁矿以及少量黄铜矿所组成,其中闪锌矿主要与黄铁矿共生,黄铜矿主要发现于黄铁矿颗粒的周边,且相对分布数目较少。此外,还发现微量的Au、Ag颗粒分布于黄铁矿和磁黄铁矿的间隙中。除了上述硫化物型矿物以外,试验中亦可检测到如钾长石,钡硅铝石,黑云母等硅酸盐类矿物,一些含Ca、Mg、Fe的碳酸盐类矿物以及一些铁锰氧化物。东升庙矿区深部原生矿石主要以硫化物型矿物为主,其中不同矿物之间共生关系有所差异,在一定程度上对于寻找某类矿体具有较大的意义。

In order to have greater understanding on geological features of Dongshengmiao ore deposit,and perfect the geological background data of mining area,the deep ore samples of polymetallic deposit are collected and its ore components are analyzed by adopting the electron probe microanalysis （EPMA）.The experimental results showe that,the deep ore body of Donghengmiao mining area mainly occurs in the form of sulfide,which are composed of pyrite,galena,sphalerite,pyrrhotite and a small amount of chalcopyrite.The sphalerite mainly has an intergrowth relationship with pyrite,and less chalcopyrite is mainly found around the pyrite.In addition,trace amounts of gold and silver particles are also distributed in the gap of pyrite and pyrrhotite.Except for the sulfide minerals mentioned above,some silicate minerals such as potash feldspar,barium silicon diaspore and biotite,some carbonate minerals that contain Ca,Mg and Fe and some iron and nanaganese oxides are also detected.It can be confirmed that the deep primary ore in Dongshengmiao mining area is mainly composed of sulfide minerals,and the symbiotic relationship between different minerals may show some difference,which have great significance in seeking for certain types of ore body.