高频大地电磁法在山东招平断裂深部探测的应用效果  

The Application of High Frequency Magnetotelluric Method in Deep Exploration of Zhaoping Fault in Shandong Province

作　　者：王敬志 李进桂 孙德华 王广朋 曹李慧 郝占优 李文尧[2] 廖忠 孙暄 王熙 隆季原 WANG Jing -zhi;LI Jin-gui;SUN De-hua;WANG Guang-peng;CAO Li-hui;HAO Zhan-you;LI Wen-yao;LIAO Zhong;SUN Xuan;WANG Xi;LONG Ji-yuan(Zhaoyuan Caojiawa Gold Deposit,Zhaoyuan Shandong 265400,China;School of Land and Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;Kunming Xindi Geological Exploration Co., Ltd.,Kunming 650233,China)

机构地区：[1]招远市曹家洼金矿,山东招远265400 [2]昆明理工大学国土资源工程学院,昆明650093 [3]昆明鑫地地质勘探有限公司,昆明650233

出　　处：《科技和产业》2021年第6期274-277,共4页Science Technology and Industry

基　　金：国家重点研发计划项目(2018YFC0603903-03);山东省招远市曹家洼金矿物探勘查项目。

摘　　要：山东省招(远)-平(度)断裂带是胶东地区金矿非常重要的导矿容矿构造,区内矿床约50%赋存在招平断裂带上,在招平断裂北段新发现的金矿体延伸至深部-2173 m标高,因此研究探测招平断裂深部的有效物探方法具有重要意义。在招平断裂中段采用高频大地电磁法(EH4)低频探头探测方式探讨了招平断裂深部探测的有效性及应用效果。经5条剖面113个测点测量,反演深度达2500 m,推断的深部招平断裂与10个已知钻孔控制的断裂对比分析研究,推断的断裂视倾角最大误差为5°,推断的断裂深度相对误差为3.6%~8.2%。说明采用高频大地电磁法低频探测方式是探测招平断裂深部的有效方法,值得推广应用。The Zhao(yuan)-Ping(du)fault zone in Shandong Province is a very important ore guiding and ore hosting structure in the Jiaodong area.About 50%of the deposits in the area are located on the Zhaoping fault zone,and the newly discovered gold deposits in the northern part of the Zhaoping fault extend to the deep-2173 m elevation.Therefore,it is of great significance to study the effective geophysical prospecting method in the deep part of Zhaoping fault.In the middle part of Zhaoping fault,the effectiveness and application effect of deep exploration in Zhaoping fault are discussed by using the high-frequency probe method(EH4)low frequency probe method.The inversion concentration of 2500 m is measured by 113 measuring points in 5 sections,and the comparative analysis between the deep Zhaoping fault and 10 known borehole controlled fractures is deduced.The maximum error of the fault apparent dip angle is 5 degrees,and the relative error of the estimated depth of rupture is 3.6%~8.2%.It shows that the high-frequency electromagnetic method is an effective method to detect the deep part of the Zhaoping fault,and is worthy of popularization and application.

关 键 词：山东招平断裂 高频大地电磁法(EH4) 断裂深部探测 低频探头探测效果 

分 类 号：P3[天文地球—地球物理学]