湖北四方山-团山沟地区锰(磷)矿床的地质特征及潜力分析

Geological characteristics and potential analysis of the Sifangshan-Tuanshangou manganese(phosphorite)deposits,Hubei Province

湖北四方山—团山沟地区位于华北板块与扬子板块结合部的桐柏—大别成矿带上,地质调查已发现了初具规模的四方山和团山沟锰(磷)矿床,为沉积变质型矿床,目前控制规模为中型。根据近年地质、槽探及钻探勘查成果,总结了该区锰(磷)矿床地质特征及矿床成因,同时对矿区进行了远景预测,认为四方山和团山沟锰(磷)矿床中矿体的赋存位置及产状均严格受NW向断裂构造的控制。矿石类型可划分为氧化锰矿石、弱氧化碳酸锰矿石和碳酸锰矿石,矿石结构以交代残余为主,矿石构造以块状和条带状为主。认为四方山矿段锰矿体(Ⅲ)沿南东向矿化越来越好;06线与12线之间是锰矿找矿潜力区之一;团山沟矿段沿南东走向呈现出良好的锰矿找矿前景。

The Sifangshan-tuanshangou area in Hubei Province is located in Tongbai-Dabie metallogenic belt,which is the junction of North China plate tectonic belt and Yangtze plate tectonic belt.The area possesses such fairly large manganese deposits as Sifangshan、Tuanshangou,belonging to sedimentary metamorphic medium-sized phosphorus and manganese deposits.According to the results of geological,trenching and drilling exploration in recent years.This paper summarizes the metallogenic geological characteristics and genesis of the phosphorus and manganese deposits.At the same time,it makes a prospective prediction of the mining area,and holds that the distribution and attitude of the orebodies are controlled by NW striking faults.The types of the ore can be divided into manganese oxide,weakly oxidized manganese carbonate,manganese carbonate.The dominant texture is metasomatic residual,and the ore structure consists mainly of massive and banded forms.The manganese orebody(Ⅲ)mineralization in Sifangshan is getting better and better along the SE direction.Between line-06 and line-12 is one of the potential areas for phosphorus and manganese ore and the Tuanshangou presents a good prospecting potential along SE striking.