摘要
湖北省南漳县吴家沟——黄草岭矿区重晶石矿主要赋存于震旦系上统灯影组地层中,少量呈脉状分布于穿层(顺层)断裂构造带中。矿石类型以角砾状和块状重晶石两种为主。矿体既要灯影组地层控制又多与一系列层间断裂及构造破碎带有关。流体包裹体研究显示,成矿流体的盐度为2.5~17.2Wt%NaCLeq,温度136℃~231℃,属中温偏低温的中低盐度流体。成矿流体以变质水为主混入了大气降水构成。矿区中三种不同地质体产出的黄铁矿δ34SV-CDT(‰)值4.1‰~4.6‰,极差小,硫主要来源于地层,形成时物理化学条件稳定。本区重晶石矿床属层控中低温热液型矿床。
Barite deposits in Wujiagou huangcaoling mining area,Nanzhang County,Hubei Province,mainly occur in Dengying Formation of the Upper Sinian system,and a small amount of them are distributed in the bedding(bedding)fault structural belt in vein shape.The ore types are mainly breccia and massive barite.The ore body is not only controlled by Dengying Formation,but also related to a series of interlayer faults and structural fracture zones.The study of fluid inclusions shows that the salinity of ore-forming fluid is 2.5~17.2wt%nacleq,the temperature is 136℃~231℃,which belongs to the medium low temperature fluid.The ore-forming fluid is mainly composed of metamorphic water and atmospheric precipitation.The value ofδ34SV-CDT(‰)of pyrite produced by three different geological bodies in the mining area is 4.1‰~4.6‰,the range is small,the sulfur mainly comes from the stratum,and the physical and chemical conditions are stable at the time of formation.The barite deposit in this area belongs to stratabound meso low temperature hydrothermal type.
作者
唐新桥
TANG Xin-qiao(Hubei Institute of geological exploration,Sinochem Bureau of Geology and mines,Wuhan 430074,China)
出处
《世界有色金属》
2020年第9期238-240,共3页
World Nonferrous Metals
关键词
地质特征
重晶石矿
成因分析
geological characteristics
barite ore
genetic analysis
