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一、地质简况锰矿点位于盐边某地一个背斜的北西翼。由奥陶系、志留系地层组成了向北倾斜的单斜构造。本文中所述的蔷薇辉石,则呈小透镜状、薄层状、产于中奥陶统巧家组(O_2~(?))碳酸盐岩地层内,与上下岩层呈整合接触。这套碳酸盐岩地层,受区域变质作用并不深,其中的燧石条带,泥质条带及生物碎屑等仍可见到。岩相古地理环境为古陆边缘的小型海湾,它接受了锰质及硅质等的沉积,这就为以后蔷薇辉石等的形成提供了
First, the geological profile Manganese mine is located in Yanbian an anticline north west wing. From the Ordovician, Silurian strata formed northward tilt of the monocline structure. The rhodonite described in this paper is small lens-like and thin-layered, which is produced in the middle Ordovician Qiaojia Formation (O 2 ~ (?)) Carbonate formation and is in contact with the upper and lower strata. This carbonate rock formation is not deeply affected by the regional metamorphism. The chert bands, muddy bands and biological debris are still visible. The lithofacies palaeogeographic environment is a small bay at the edge of the ancient land. It accepted the deposition of manganese and siliceous rocks, which provided the later formation of gravel