航磁资料在二连盆地构造区划及断裂体系识别中的应用  

Application of Aeromagnetic Data in Structure Division and Fault System Identification of Erlian Basin

作　　者：高玲举 于磊 刘祜[1] GAO Lingju;YU Lei;LIU Hu(CNNC Key Laboratory of Uranium Resources Exploration and Evaluation Technology,Beijing Research Institute of Uranium Geology,Beijing 100029,China;Shandong Provincial Key Laboratory of Water and Soil Conservation and Environmental Protection,College of Resources and Environment,Linyi University,Linyi,Shandong 276000,China)

机构地区：[1]核工业北京地质研究院中核集团铀资源勘查与评价技术重点实验室,北京100029 [2]临沂大学资源环境学院山东省水土保持与环境保育重点实验室,山东临沂276000

出　　处：《铀矿地质》2022年第4期771-780,共10页Uranium Geology

基　　金：核工业北京地质研究院院长基金项目(编号:物QJ2006);山东省自然科学基金项目(编号:ZR2017PD007);中核集团集中研发项目(编号:物SD2-3)联合资助。

摘　　要：二连盆地是我国重要的砂岩型铀矿产铀盆地之一,古河道砂岩型铀矿多为隐伏盲矿,用地球物理勘查方法寻找隐伏构造和盲矿体的优势得以发挥。文章利用最新的航磁资料,通过化极、解析延拓和总水平导数计算等处理,得到了与断裂相关的地球物理场信息,揭示了二连盆地磁异常具有明显的分区性和分带性。根据磁异常特征将二连盆地划成4个区域,共推断出28条断裂,断裂方向主要呈北东向、北东东向、近东西向和北西向,这些断裂主要是以不同磁场分界线、梯度带和串珠状的异常,表现为磁场分区、分带的界线。在此基础上,根据航磁资料解释和实际应用结果对断裂构造和成矿关系进行了探讨,初步圈定了二连盆地北部马尼特-乌兰察布带为铀成矿有利区。Erlian Basin is one of the most important sandstone type uranium deposits base in China.Most deposits are concealed paleochannel sandstone type,which make the geophysical prospecting is of advantage in detecting the blind ore bodies.Based on the latest aeromagnetic data,the geophysical field information related to the fault was obtained by anomaly depolarization,continuation and total horizontal derivative calculation.It was found that the magnetic anomaly in Erlian Basin has obvious zoning and zonation.According to the characteristics of magnetic anomaly,Erlian Basin was divided into 4 subarea,and 28 faults were inferred.The fault direction is mainly NE,NEE,EW,NW.These faults are mainly abnormal with different magnetic field boundaries,gradient zones and beads,which are shown as the boundaries of magnetic field division and zoning.On this basis,according to the interpretation of aeromagnetic data and the results of practical application,the relationship between deep faults and mineralization was discussed,and Manite-Wulanchabu depression of the northern Erlian Basin was preliminarily delineated as a prospective uranium deposit area.

关 键 词：航磁资料 二连盆地 构造区划 断裂构造特征 

分 类 号：P619.222[天文地球—矿床学] P619.14[天文地球—地质学]