嘉峪关市黑山白云石矿地质特征

Geological Characteristics of Heishan Dolomite Mine in Jiayuguan City

黑山白云石矿地处阿拉善地块台隆、北祁连褶皱带西段、阿尔金山断裂交接复合地带,属走廊过渡带酒泉中新生代拗陷,榆树沟山隆起北缘。矿体赋存于寒武系中统中岩组(∈22)地层中,矿体规模较小,地表矿体长约365~396 m,赋存在1828 m至2062 m标高之间,宽约15~47 m,矿体倾向南,倾角为70°~80°,矿体平均厚度29.60 m,矿体(MgO)平均品位18.51×10^-2,矿体围岩均为硅质岩。该矿区矿石主要以熔剂用白云岩为主,根据样品分析结果,样品均达到熔剂用白云岩矿石质量要求。

Heishan dolomite mine is located in the Alashan massif platform uplift,the western segment of the North Qilian fold belt,and the Altun Mountain Fault junction complex zone,belonging to the corridor transition zone Jiuquan Mesozoic Cenozoic depression and the northern margin of Yushugou mountain uplift.The orebody is located in the Middle Cambrian middle rock formation(∈22)stratum.The scale of the ore body is small.The surface ore body is about 365~396 m long,distributed between the elevation of 1828 m and 2062 m,and the width is about 15~47 m.The ore body is inclined to the south with an angle of 70°~80°and the average thickness of the ore body is 29.60 m.The average grade of the ore body(MgO)is 18.51×10^-2.The wall rock of the ore body is siliceous rock.According to the results of sample analysis,the samples all meet the quality requirements of flux dolomite ore.