摘要
广西凤山县顶头金矿勘查区具有较好的探寻微细浸染型金矿的潜力,该类型金矿主要受断层控制。为了查明勘查区内断层构造的深部展布情况,进而为钻探工程布置提供依据,在工作区36、56、128线开展音频大地电磁法(AMT)测深工作;测得数据采用二维反演,生成电阻率反演剖面图,并结合工作区地质特征等对3条剖面进行地质解译;解译结果为推断F_(1)、F_(2)控矿断层深部总体仍向南西倾斜,且产状逐渐变陡,施工钻孔时应布置斜孔,方位南东。在36线、56线布置钻孔验证,均见到金矿(化)体,取得了较好找矿效果,见矿位置均与AMT断面对应的中-低阻带相吻合。总体结果表明,AMT法在本区识别断层构造是有效的,值得在滇黔桂地区勘查金矿时应用与推广。
The Dingtou gold exploration area in Fengshan County,Guangxi has a good potential to search for micro-disseminated gold deposits,which are mainly controlled by fault structures.The purpose of this work is to clarify the deep distribution of fault structures in the exploration area and provide a basis for drilling deployment.An audio magnetotelluric(AMT)survey is carried out in lines 36,56 and 128 of the exploration area.A two-dimensional inversion of the survey data was conducted to generate resistivity profiles,which were then interpreted in combination with the geological characteristics of the working area.The results suggest that the deep part of faults F1 and F2 dip to southwest,gradually becoming steeper toward depth.The inclined drilling holes should be arranged with orientation in the southeast direction.Confirmation by drilling holes in lines 36 and l56 shows that the gold(mineralization)body can be seen,implying a good prospecting effect achieved.The location of ore body found is consistent with the medium-low resistance zone in the AMT section.The overall research shows that the AMT method is effective in identifying fault structures in this area,and worthy of application and popularization in prospecting of gold deposits in Yunnan-Guizhou-Guangxi areas.
作者
严新泺
刘晓珠
卢斌
陈继永
方贵聪
YAN Xinluo;LIU Xiaozhu;LU Bin;CHEN Jiyong;FANG Guicong(Guangxi Geological Exploration Institute of China Metallurgical Geology Bureau,Nanning,Guangxi 530022;Institute of Mineral Resources Research of China Metallurgical Geology Bureau,Beijing 101300;Guilin University of Technology,Guilin,Guangxi 541004)
出处
《地质与勘探》
CAS
CSCD
北大核心
2021年第6期1366-1373,共8页
Geology and Exploration
关键词
音频大地电磁法
勘查
金矿
顶头
凤山
广西
AMT
deep prospecting
gold deposit
Dingtou
Fengshan
Guangxi
