山西省盂县羊泉冶镁白云岩矿床地质特征、成因及经济意义研究

金属镁是新世纪重要的绿色金属能源,而冶镁白云岩是生产金属镁不可缺少的原料,是山西省能源重化工基地的一种十分重要的矿产资源.盂县羊泉冶镁白云岩矿床位于吕梁、太行断块-五台山块隆东侧,白云岩矿体赋存于寒武系上统-奥陶系下统三山子组,总体上呈走向NW、倾向SW的单斜构造.含矿岩石主要为中-厚层细-粗晶白云岩,粉晶-细晶或中粗晶粒状结构,块状或薄层状构造.矿床的形成演化经历了沉积-白云岩化-重结晶三个阶段.矿体平均品位ω(MgO)为21.20％、ω(SiO2)为0.67％、ω(K2O+ Na2O)为0.076％,品位变化较均匀.该区共求得冶镁用白云岩矿资源量约3.45亿吨,属一大型矿山,具有较大的开发前景.

Geological characteristics,genesis and economical significance of Yangquan dolomite deposit for magnesium smelting,Yuxian in Shanxi

Magnesium is important green metal energy in the new century.Dolomite for magnesium smelting is necessary material to produce the metal of magnesium.Yangquan dolomite deposit for magnesium smelting of Yuxian,Shanxi is situated in the eastern of Luliang-Taihang fault block and Wutai mountain block rise.The dolomite ore body is distributed in Sanshanzi group of upper Cambrian-lower Ordovician with generally monocline structure of north-west strike and south-west dip.The ore-bearing rocks are middle-thick layer dolomite,micro-macro crystalline or middle-macro crystalline granular texture and blocky or thin-layer structure.Genesis and evolution of the deposit experienced three stages of sedimentation,dolomitation and recrystallization.Average grade of the deposit is MgO 21.20%、SiO2 0.67%、K2O+Na2O 0.076%,with less variation in grade.Yangquan dolomite for magnesium smelting is a large mine,and there is a good development prospect.