湖北省宣恩县二叠系孤峰组黑色岩系含矿性分析

Ore Potential of Black Shale Series in Gufeng Formation of Permian in Xuanen County,Hubei Province

黑色岩系是含有机炭(有机炭含量接近或>1%)及硫化物(铁硫化物为主)较多的深灰—黑色的硅岩、碳酸盐岩、泥质岩及其变质岩石的组合体系。近年来,随着科学技术的不断发展,黑色岩系中的钒、钼、硒等矿产资源受到国内外的广泛重视。通过对鄂西宣恩县二叠系中部孤峰组黑色岩系分布区的区域地质和典型矿床(点)地质特征分析,结合区域物化探资料,对宣恩地区孤峰组黑色岩系的沉积建造、成矿地质特征和控制因素进行了阐述,探讨了二叠系中统黑色岩系的含矿性及其成矿机理,指出了宣恩县的北东部成矿地质条件有利,具有找矿前景,并提出了水田坝、铁厂坡、石砂坪、范家坪及卡璜梁5个成矿远景预测区。

Black shale series are combination systems of deep gray-black silicalite,carbonate,argillaceous rock and its metamorphic rocks which contain more organic carbon（organic reserve of carbon near or more than 1%）and sulfides（mainly iron sulfides）.In recent years,with the development of science and technology,vanadium,molybdenum and selenium in black shale series are attached great importance both at home and abroad.According to geological characteristics analysis of regional geology and typical deposit（spot）in the distribution area of black shale series in Gufeng Formation of upper Permian,Xuanen,combining with regional geophysical and geochemical data,this paper elaborates sedimentary formation,mineralizing geological characteristics and controlling factors of black shale series in Gufeng Formation of Xuanen.It also discusses ore potential and its metallogenic mechanism of black shale series in upper Permian and points out that geological condition of mineralization in northeast Xuanen is favourable,where is of good prospecting potential.Five metallogenetic prognosis areas including Shuitianba,Tiechangpo,Shishaping,Fanjiaping and Kahuangliang are posed.