湘中地区成锰盆地内部聚锰槽盆结构初探  

Preliminary Study on the Structure of Manganese Trough Basins inside the Manganese Basins in Central Hunan Province

作　　者：陈旭 李朗田 丛源[3] 曹景良 黄飞 雷玉龙 肖德长 李连支 Chen Xu;Li Langtian;Cong Yuan;Cao Jingliang;Huang Fei;Lei Yulong;Xiao Dechang;Li Lianzhi(Central South Geological Survey Institute of China Metallurgical Geology Bureau,Wuhan,Hubei 430080;Institute of Mineral Resources Research,China Metallurgical Geology Bureau,Beijing 101300;MNR Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037)

机构地区：[1]中国冶金地质总局中南地质调查院,湖北武汉430080 [2]中国冶金地质总局矿产资源研究院,北京101300 [3]中国地质科学院矿产资源研究所自然资源部成矿作用与资源评价重点实验室,北京100037

出　　处：《资源环境与工程》2021年第5期580-586,共7页Resources Environment & Engineering

基　　金：湘西—滇东地区矿产地质调查(DD20160032);上扬子东南缘锰矿资源基地综合地质调查(DD20190814)。

摘　　要：以中南华世湘潭成锰盆地内的九潭冲—楠木冲聚锰槽盆、中奥陶世桃江成锰盆地内的月山铺—祖塔聚锰槽盆为例,利用锰矿层厚度—品位等值线解析聚锰槽盆结构。研究表明,两个聚锰槽盆分别由NW向、NNW向同沉积断裂断陷形成,控制锰矿带的空间分布;从上述聚锰槽盆中各识别出2个成锰凹陷带,分别由NE向、NEE向基底浅层平移断裂沉陷形成,控制锰矿床(点)及锰矿沉积中心的空间分布;综合地质、物探、钻探等手段,揭示含锰岩系在深部的空间范围、形态、产状等特征。研究成果可为圈定锰矿成矿有利地段、提升锰矿找矿效果提供依据。Taking Jiutanchong-Nammuchong manganese trough basin in Xiangtan Middle Nanhua manganese basin and Yueshanpu-Zuta manganese trough basin in Taojiang Middle Ordovician manganese basin as examples,the structure of manganese trough basin is analyzed by manganese one layer thickness-grade contour map.Study shows that two manganese trough basins are formed by fault depressions of NW-trending and NNW-trending synsedimentary fault respectively,which control the spatial distribution of manganese ore belts.Two manganese sag belt are identified from each manganese trough basin,which were formed by the subsidence of NE-trending and NEE-trending shallow basement translation fault respectively,to control the spatial distribution of manganese deposits(points)and manganese deposit centers.By comprehensive geological,geophysical,drilling and other means,the paper reveals the manganese-bearing rock series in deep space range,morphology,occurrence and other characteristics.The research results can provide a basis for the delineation of favorable areas for manganese mineralization and the improvement of manganese ore prospecting effect.

关 键 词：成锰盆地 聚锰槽盆 成锰凹陷带 结构 内源外生 九潭冲—楠木冲 月山铺—祖塔 

分 类 号：P618.32[天文地球—矿床学]