摘要
湖北兴山地区重晶石矿由于投入工作少,工作程度低。通过本次研究工作,查清了兴山重晶石矿分二种,其一为沉积型重晶石矿,赋存于寒武系中统覃家庙组白云岩层中,呈层状,与顶板围岩均呈整合接触,延伸较为稳定。以块状矿石为主,品位高,BaSO4含量一般大于95%,呈白、灰白色,为海相沉积作用形成,属同沉积重晶石矿。其二为层控型重晶石矿赋存于奥陶系宝塔组白云岩中,白度高,密度大,由于倾向延伸不大,但多不具工业开采价值。整体上兴山重晶石矿是国内外较为罕见的高品位、高白重晶石矿,研究表明该区重晶石矿按成因主要为沉积型重晶石矿和层控型重晶石矿,其成矿物源来源于热卤水,通过同沉积作用或构造运动两种方式成矿。
Because of less geological work input and low level of works on barite ore in the Xingshan area, Hubei Province, thus to make clear hosting pattern of the ore and guide prospecting should carry out research works. Through the research has found that the barite ore in the area can be divided into two kinds. The one is sedimentary barite, hosted in middle Cambrian Qinjiamiao Formation dolomite, stratified, conformable contact with roof adjoining rock, steadily extended. Ore is mainly blocky, high grade, BaSO 4 content generally higher than 95%, white, grayish white, marine sedimentation formed, belongs to synsedimentary barite deposit. The other is stratabound barite, hosted in Ordovician Baota Formation dolomite, high whiteness, large density, since not large range of dip extended, mostly without industrial exploitation value. As a whole, the Xingshan barite is a kind of infrequent high grade, high whiteness barite both at home and abroad. The study has shown that according to genesis, the barite is mainly sedimentary and stratabound barite, genetic mineral source is from hot brine, mineralized through synsedimentary process or tectogenesis two modes.
作者
吴先文
Wu Xianwen(Hubei Coal Geological Exploration Institute, Wuhan, Hubei430021)
出处
《中国煤炭地质》
2019年第A01期122-127,共6页
Coal Geology of China
关键词
兴山地区
重晶石矿
地质特征
成因机制
Xingshan area
barite ore
geological features
geneticmechanism
