西拉木伦河断裂重、磁、电特征分析  

An analysis of gravity magnetic and electric characteristics of the Xar Moron River fault

作　　者：袁永真[1,2] 张小博[1,2] 张鹏辉[1,2] 钟清[1,2] 

机构地区：[1]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 [2]国土资源部地球物理电磁法探测技术重点实验室,河北廊坊065000

出　　处：《物探与化探》2015年第6期1299-1304,共6页Geophysical and Geochemical Exploration

基　　金：中国地质调查局地质大调查项目(1212011120971)

摘　　要：西拉木伦河断裂带主体位于天山—兴蒙地槽系的中东部,沿西拉木伦河近东西走向延伸,是中国东北地区的一条规模较大的断裂带。该断裂带的界限位置一直是地质界研究的热点问题。目前对于断裂带性质的研究主要集中在大兴安岭以西地区,对大兴安岭以东的地区研究甚少。笔者从重、磁、电的角度分析了西拉木伦河断裂在大兴安岭以东地区的重、磁、电特征,利用小波多尺度分析方法对各异常场进行了分离,基于获得的含有异常信息的各阶图像,并结合大地电磁剖面,综合推断出西拉木伦河断裂的空间展布情况,认为西拉木伦河断裂是一条超壳断裂。Located in the Eastern Tianshan-Xingmon geosynclinals system,the main body of the Xar Moron River fault zone is a WEstriking large-sized faulted structure extending along the Xar Moron River,and is also one of the larger faulted zones in Northeast China.The position of the fault has always been a hot topic in geological history.Now the research on the fault zone is mainly concentrated on the west region of the Da Hinggan Mountains,whereas the research on the east of the region is relatively insufficient.The authors analyzed the gravity magnetic and MT characteristics of the Xar Moron River fault in the east region of the Da Hinggan Mountains,separated the gravity magnetic fields by wavelet multi-scale analysis method,and inferred the location of the Xar Moron River fault.According to the images obtained that include the abnormal information and MT profile,the authors hold that the Xar Moron River fault is an ultracrustal deep fault.

关 键 词：西拉木伦河断裂 小波细节 大地电磁测深 

分 类 号：P631[天文地球—地质矿产勘探]