可控源音频大地电磁测量对腾格尔坳陷东北缘下白垩统赛汉组砂体的识别及其地质意义  

The identification of the sand body of Lower Cretaceous Saihan Formation on the northeastern margin of Tengger depression by controlled source audio frequency magnetotelluric survey

作　　者：李英宾 LI Ying-Bin(Airborne Survey and Remote Sensing Center of Nuclear Industry,Shijiazhuang 050002,China;Key Laboratory of Uranium Resources Geophysical Exploration Technology,China Nuclear Industry Group Company,Shijiazhuang 050002,China;Hebei Key Laboratory of Airborne Survey and Remote Sensing Technology,Shijiazhuang 050002,China)

机构地区：[1]核工业航测遥感中心,河北石家庄050002 [2]中核集团铀资源地球物理勘查技术中心重点实验室,河北石家庄050002 [3]河北省航空探测与遥感技术重点实验室,河北石家庄050002

出　　处：《物探与化探》2021年第3期616-623,共8页Geophysical and Geochemical Exploration

基　　金：中国核工业地质局项目(201539⁃1)。

摘　　要：腾格尔坳陷铀矿找矿工作一直无实质进展,因此利用可控源音频大地电磁法(CSAMT)进行探测,识别研究区沉积特征、构造格架,尤其是对找矿目的层——下白垩统赛汉组及其砂体进行识别。结合地质钻孔资料,通过对研究区数据正反演计算,优选了反演模型和反演参数,识别出了研究区下白垩统赛汉组砂体的空间展布特征,简要分析了古河道的发育特征,为铀矿勘查方向提供了参考。There has been no substantial progress in uranium prospecting in Tengger depression. Therefore, CSAMT is used to identify the sedimentary characteristics and structural framework of the study area, especially the lower Cretaceous Saihan formation and its sandbodies. Combined with the geological drilling data, through the forward and inverse calculation of the data in the study area, the inversion model and inversion parameters are optimized, the spatial distribution characteristics of the sand body of the lower Cretaceous Saihan formation in the study area are identified, and the development characteristics of the ancient river channel are briefly analyzed, which provides a reference for the direction of uranium exploration.

关 键 词：腾格尔坳陷东北缘 CSAMT 正反演计算 下白垩统赛汉组砂体 铀矿勘查 

分 类 号：P631[天文地球—地质矿产勘探]