可控源音频大地电磁法（CSAMT）在安庆铜矿乌珠尖探区深部找矿中的应用

摘要

利用可控源音频大地电磁法（CSAMT）资料与构造解析相结合的方法，确定月山—黄土山背斜的构造形态，并绘制闪长岩岩体和月山组地层顶面等高线图。通过对比分析乌珠尖探区与邻区的CSAMT 剖面特征，对乌珠尖勘探区的 CSAMT 剖面进行重新解释，提出该区有利的勘探部位。研究表明：①月山地区 CSAMT 剖面低阻带内没有矿体，高阻背景下的“V”型低阻异常带和陡降带是有利的成矿部位；②乌珠尖西南部是有利的勘探区块，并在该区预测了2个有利勘探钻孔；③乌珠尖探区与朱冲矿区位于月山—黄土山背斜倾伏端的两翼，在构造部位和成矿条件上具有相似性，是成矿的有利构造部位。%With the combined application of CASMT data and tectonic analysis,the tectonic features of Yueshan--Huangtushan anticline were ascertained.And the superface contour maps of the diorite rock masses and the Yueshan strata were drawn.Besides,the CSAMT profile of Wuzhujian exploration area was redefined by com-parative analysis of CSAMT profile characteristics of the Wuzhujian exploration area with its neighboring areas.In the end,advantageous exploration sites of the areas were made clear.The results show that ①there were no ore bodies within the low-resistance belts of the CSAMT profile of Yueshan area;and the V-shaped low-resistance belts of high-resistance zones and the sharp-drop belts were the favorable metallogenic places;②the southwest areas of Wuzhujian were the favorable exploration blocks and two favorable prospecting holes were predicated in these areas.③lying in the wings of the Yueshan --Huangtushan anticline pitch ends,respectively,the Wuzhujian exploration area and Zhuchong mining areas resembled each other in tectonic position and metallogenic condition,and they are favorable tectonic positions for mineralization.