贵州从江-黎平地区锰矿地质特征及找矿潜力分析

Geological Characteristics and the Potential of Search for Manganese Ore in the Congjiang-Liping Area,Guizhou Province

贵州从江-黎平地区锰矿产于南华系大塘坡组第一段黑色岩系中。通过对从江-黎平地区开展地质调查工作,查明该区含锰岩系分布于朝里向斜及寨柳向斜,区内两个已知矿床八当锰矿和高增锰矿即位于朝里向斜。文章系统阐述了从江-黎平地区锰矿成矿地质背景、含锰岩系特征、锰矿床地质特征,对该区南华纪大塘坡期锰矿成因进行了探讨研究,并总结了区内锰矿成矿规律,在此基础上,结合野外地质调查成果,对该区锰矿找矿潜力进行了分析,认为朝里向斜南部具一定找矿潜力。

Manganese ore in the Congjiang-Liping area of Guizhou occurs in the black rock series,the first member of Datangpo Formation of the Nanhua System.Geological surveys in this area show that the Mn-bearing rock series is distributed in the syncline of Caoli and anticline of Zhailiu.The two discovered manganese deposits in this area,i.e.the Badang and Gaozeng mines,are located in the syncline of Caoli.This paper systematically expounds the metallogenic geological background of manganese deposits,characteristics of the Mn-bearing rock series,and geological characteristics of manganese deposits in the Congjiang-Liping area.Then the genesis of manganese deposits and the regularity of manganese ores formation are discussed.Combined with geological surveys,this paper analyzes the prospecting potential of manganese ores in this area,and suggests that some potential of ore search exists in the south of the Caoli syncline.