我国南方主要锰矿找矿远景区内弧形构造带特征及其找矿预测  

Characteristics of Arcuate Structral Belts in Main Manganese Prospect Areas of South China and the Prospecting Prediction

作　　者：刘延年 李连支 胡雅菲 陈旭 吴继兵 刘虎 江沙[3] LIU Yannian;LI Lianzhi;HU Yafei;CHEN Xu;WU Jibing;LIU Hu;JIANG Sha(Central South Geo-Exploration Institute,Wuhan,Hubei 430080;Hunan Geological Exploration Institute of China Metallurgical Geology Bureau,Changsha,Hunan 410001;Guangxi Geological Exploration Institute of China Metallurgical Geology Bureau,Nanning,Guangxi 530022)

机构地区：[1]中国冶金地质总局中南地质勘查院,湖北武汉430080 [2]中国冶金地质总局湖南地质勘查院,湖南长沙410001 [3]中国冶金地质总局广西地质勘查院,广西南宁530022

出　　处：《地质与勘探》2019年第S01期241-248,共8页Geology and Exploration

基　　金：中国地质调查局“湘西-滇东地区矿产地质调查”项目(Nos.DD20160032)资助。

摘　　要：我国南方主要锰矿找矿远景区中,大多发育由锰矿控矿褶皱、破矿断裂为主组成的控矿弧形构造带,为逆冲-推覆(重力滑覆)褶断构造带,其低角度的叠瓦状逆冲断层、双重逆冲构造常常造成含锰岩系地层的多次上、下重叠,较多较好地保存了原生锰矿层,但有些破矿断层将含锰岩系错断至深部,被保存下来成为隐伏矿。本文综合归纳逆冲推覆(重力滑覆)构造特征及控矿特征;研究了分布在湘西-滇东一带的湘黔渝毗连区、湘中、黔东南-湘西南、桂中、湘中南、桂西南、滇东南等主要锰矿找矿远景区中发育的弧形逆冲推覆(重力滑覆)构造带特征;对湘西-滇东地区发育的6个主要锰矿找矿远景区内弧形构造带进行了找矿预测,圈定找矿靶区50余处,预测锰矿石资源量26亿吨,为未来锰矿深地探测及资源基地综合调查评价提供新的找矿思路及调查评价方向。Most of the main manganese prospective areas in south China are arc-shaped structural belts composed of manganese ore-controlling folds and ore-breaking faults,which are thrust-nappe(gravity nappe)fold structural belts.Their low-angle imbricated thrust faults and double thrust structures often cause multiple overlaps of manganese-bearing strata.Many primary manganese ore beds are well preserved,but some ore-breaking faults fault manganese-bearing rock series to the deep,and are preserved as concealed ores.This work summarized the structural characteristics and ore controlling characteristics of thrust nappe(gravity sliding nappe),and studied the characteristics of arcuate thrust nappe(gravity slip nappe)structural belt developed in the main manganese ore prospecting prospective areas,such as the adjacent area of western Hunan-eastern Yunnan,central Hunan,southeast Guizhou-southwestern Hunan,central Guangxi,central-south Hunan,southwest Guangxi and southeast Yunnan.We conducted metallogenic prediction on the arc-shaped tectonic zones of six main prospecting areas for manganese deposits in western Hunan-eastern Yunnan.More than 50 prospecting targets were delineated and 2.6 billion tons of manganese ore resources were predicted.The result provides a new prospecting idea and direction of investigation and evaluation for the future deep exploration of manganese deposits and comprehensive investigation and evaluation of manganese resource bases.

关 键 词：资源潜力 找矿预测 逆冲推覆构造 弧形构造带 锰矿找矿远景区 我国南方 

分 类 号：P618[天文地球—矿床学]