AMT在戌街石墨矿勘查中的试验效果分析  

Experimental Effect Analysis of AMT in Exploration of Xujie Graphite Mine

作　　者：李松柏 王亮 唐喜 朱广飞 LI Songbai;WANG Liang;TANG Xi;ZHU Guangfei(No.209 Geological Party,Geological Bureau of Yunnan Nuclear Industry)

机构地区：[1]云南省核工业二〇九地质大队,云南省昆明市650106

出　　处：《现代矿业》2023年第1期14-17,21,共5页Modern Mining

摘　　要：为了解物探AMT测量方法在戌街石墨矿勘查中的可行性,选用EH-4电磁成像系统在已知矿段开展剖面测量试验,根据探测到的低阻异常推测了石墨矿体的空间位置,并使用IMA-GEM和MT-Pioneer对测量数据分别进行了一维和二维反演,将反演成果与钻探资料做对比研究。研究结果发现,电阻率断面图中的低阻条带与已知石墨矿体对应关系较好,二维反演成果较一维反演成果更符合实际地质情况。结果表明,AMT测量方法对低阻体有良好的分辨能力,是针对石墨矿的一种有效的勘查手段,可指导矿区下一步勘探工作的开展。In order to understand the feasibility of geophysical AMT measurement method in the exploration of Xujie graphite deposit,the profile measurement experiment in the known ore section is carried out by EH-4 electromagnetic imaging system.According to the detected low-resistivity anomalies,the spatial location of the graphite ore body is predicted.Moreover,IMAGEM and MT-Pioneer are used to perform the one-dimension and two-dimensional inversion of the measured data respectively.The inversion results are compared with the drilling data.The results show that the low-resistivity bands in the resistivity cross-section have a good correspondence with the known graphite ore bodies,and the two-dimensional inversion results are more consistent with the actual geological conditions than the one-dimensional inversion results.Therefore the AMT measurement method has good resolution ability for low resistivity bodies and is an effective exploration method for graphite ore,which can guide the next exploration work in the mine area.

关 键 词：AMT 测量 EH-4 电磁成像系统 石墨矿 一维与二维反演 

分 类 号：P619.252[天文地球—矿床学] P631.325[天文地球—地质学]