宽频大地电磁测量在准噶尔盆地北部铀矿勘查中的应用  

Application of Broadband Magnetotelluric Survey Method on uranium exploration in North Jungar Basin

作　　者：张正阳 牛禹[1,2,3] 籍增贤 ZHANG Zhengyang;NIU Yu;JI Zengxian(Airbrone Survey and remote Sensing Center of Nuclear Industry,Shijiazhuang 050061,Hebei,China;CNNC Key Laboratory for Geophysical Exploration Technology Center of Uranium Resources,Shijiazhuang 050061,Hebei,China;Hebei Key Laboratory of Airbrone Survey and remote Sensing Technology,Shijiazhuang 050061,Hebei,China)

机构地区：[1]核工业航测遥感中心,河北石家庄050061 [2]中核集团铀资源地球物理勘查中心重点实验室,河北石家庄050061 [3]河北航空探测和遥感技术重点实验室,河北石家庄050061

出　　处：《矿产与地质》2025年第1期168-173,共6页Mineral Resources and Geology

基　　金：中国核工业地质局地质调查项目(项目编码202206-7)资助。

摘　　要：应用宽频大地电磁法对准噶尔盆地北部断裂及盖层结构进行了探测研究,共布设了9条SN向剖面。通过对数据的处理、分析和反演,获得研究区内2000 m深度以浅的二维电性结构模型。综合地质资料,推断研究区内主要发育NE、NW向两组断层,其中断层F 1、断层F 2规模较大,控制盆地北部边界。基于地层和断层构造分布特征,推断目标层下白垩统吐谷鲁群的埋深及厚度,认为其在盆地内部自北往南整体呈现“中间厚、两边薄”的特征。An investigation of the north fault structures and overburden layers in the Junggar Basin is conducted with the Broadband Magnetotelluric Survey Method.Nine SN-oriented profiles are deployed for this purpose.Through data processing,analysis,and inversion,a two-dimensional electrical structure model is obtained for the shallow section(up to 2000 meters depth)within the study area.Combining the regional and geological data,it is inferred that there are primarily two groups of faults in the study area,namely the NE and NW group.Among these,fault F 1 and F 2 of a large scale control the north boundary of the basin.Based on the distribution characteristics of the strata and faults,the depth and thickness of the target layer are inferred for Tuylu Group of the Lower Cretaceous.It is considered that the Tuylu Group exhibits a pattern of"thick in the middle and thin on both sides"from the north to south within the basin.

关 键 词：宽频大地电磁测量 准噶尔盆地北部 铀矿勘查 新疆 

分 类 号：P631.3[天文地球—地质矿产勘探] P619.14[天文地球—地质学]