二连-东乌旗地区固定翼三频航电数据反演方法应用对比研究  

A comparative study of the inversion methods of fixed-wing three-frequency airborne electromagnetic data in Erenhot-East Ujimqin Banner area

作　　者：李飞 谭捍东[1] 孟庆敏[2,3,4] 吴俊彦[1] 丁志强 LI Fei;TAN Han-Dong;MENG Qing-Min;WU Jun-Yan;DING Zhi-Qiang(School of Geophysics and Information Technology,China University of Geosciences(Beijing),Beijing 100083,China;Institute of Geophysical and Geochemical Exploration,CAGS,Langfang 065000,China;Key Laboratory of Geophysical Electromagnetic Probing Technologies,Ministry of Natural Resources,Langfang 065000,China;National Research Centre of Geoexploration Technology,Langfang 065000,China)

机构地区：[1]中国地质大学(北京)地球物理与信息技术学院,北京100083 [2]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000 [3]自然资源部地球物理电磁法探测技术重点实验室,河北廊坊065000 [4]国家现代地质勘查工程技术研究中心,河北廊坊065000

出　　处：《物探与化探》2020年第5期1172-1182,共11页Geophysical and Geochemical Exploration

基　　金：国家重点研发计划项目(2017YFC0601900);中国地质调查局项目(DD20201179)。

摘　　要：固定翼频率域航电测量效率高,空间分辨率高。以往我国三频航电实测数据已获得良好的解释成果,但均以定性解释和一维反演为主,二维反演应用较少。本文将快速近似反演、一维反演、二维反演引入到二连-东乌旗重点航电异常实测数据的解释中,并将三种方法的应用效果进行了对比。快速近似反演以视电阻率计算为基础,一维反演采用Brent方法,二维反演采用数据空间Occam反演,采用Rodi法求解雅克比矩阵。结果显示,快速近似反演可快速有效地提供大数据量地下电性分布信息,一维反演可提供稳定的、具一定深度的反演结果,二维反演则具有明显的横向、纵向分辨率优势。The fixed-wing frequency-domain airborne electromagnetic method has the characteristics of a high efficiency and a high spatial resolution.In the past,The three-frequency airborne electromagnetic data have gained many good results in China.Nevertheless,they are mainly plane qualitative interpretation results,with few quantitative inversion calculations performed,which limits the improvement of interpretation level.In this paper,fast approximate inversion,one-dimensional inversion and two-dimensional inversion are introduced into the interpretation of the field data of the key AFEM anomalies in Erenhot-East Ujimqin Banner area,and the application effects of the three methods are compared with each other.Fast approximate inversion is based on the calculation of apparent resistivity.Brent method is used for the one-dimensional inversion.Occam inversion is used for the two-dimensional inversion,and Rodi method is used to solve Jacobian matrix.The results show that fast approximate inversion can quickly and effectively provide a large quantity of underground electrical distribution information,one-dimensional inversion can provide the stable inversion results with a certain depth,and two-dimensional inversion has an advantage of obvious horizontal and vertical resolution.

关 键 词：固定翼三频航电 快速近似反演 一维反演 二维反演 二连—东乌旗 

分 类 号：P631[天文地球—地质矿产勘探]