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一、矿床地質概述 (一) 地层: 矿区內最老的岩层为震旦紀白云岩和角頁岩。白云岩的出露宽度一般在300～1100公尺,岩层中常夹有燧石和白云質的条带及結核。角頁岩在矿区內出露常可1～2层以上,在矿区内常与花崗閃长岩体接触,也有夹于白云岩层中者。角頁岩多呈黑色、黑褐色、紫色块状結构及不明显的片状結构,主要矿物成分为黑云母、石英及少量长石、黃鉄矿、磁鉄矿和磷灰石等,在靠近接触带的边部,有时出现紅柱石。在北湾子、朝梁子一带角頁岩的厚度較大。
First, an overview of the geological deposit (a) strata: the oldest rock strata in the area are Sinian dolomites and horn shales. Dolomite exposure width is generally 300 to 1100 meters, the rock often contain flint and dolomitic stripe and tuberculosis. Corner shale in the mining area can often be more than 1 to 2 layers, often in the mining area in contact with the granodiorite, there are also caught in the dolomite layer. Angular shales are mostly black, dark brown, purple block structure and obvious flake structure, the main mineral composition of biotite, quartz and a small amount of feldspar, yellow ore, magnetite ore and apatite, near contact With the edge of the band, sometimes with andalusite. In Beiwanzi, the shale thickness in the vicinity of Chaoliangzi is larger.