巴颜喀拉块体东南缘地质构造的航磁反演成像

本文对研究区(98°E～103°E, 315°N～34°N) 1∶50万航磁资料的476条南北向剖面采用磁性标量层析成像方法进行了2-D成像反演.每条剖面资料点距1 km，反演的磁性柱体剖面方向宽度1 km，共约277个柱体，深度方向共8层柱体，每层厚度4 km.反演的476个断面的磁性柱体相对磁化强度幅值组成了3-D磁性数据体.对5.5、17.5、21.5、29.5 km深的磁性水平切片和7个北东向的磁性垂直切片表现的磁性特征进行了研究，并进行了地质解释.结合研究区已经公布的地质、地球物理资料，讨论了磁性细结构能提供工程地质灾害数值模拟仿真结构模型的信息，得到了反演的磁性细结构特征比场的特征能提供更多的断层和岩体3.D细节信息的初步认识.

The geology structure imaging by aero-magnetic data inversion at the Southeast margin of Bayan Har Block

The aero-magnetic data with scale 1:500000 in the research area are inverted by the magnetic scalar tomography technique in two dimension, the research area is from 98° to 103° in east longitude and from 31.5° to 34°in north latitude, the data include 476 profiles in North-South direction, the distance between two adjacent survey points is 1 km. There are 277 rectangular prisms with 1km width along the profile and 8 rectangular prisms with 4 km height in vertical direction during the inversion scheme. The inversion results of all the profiles constitute the 3-D data, from which four relative magnetic horizontal slices in the depth 5.5 km, 17.5 km, 21.5 km, 29.5 km and seven vertical slices in North-East direction are obtained respectively. We study the data and give geology interpretation. With the published geology and geophysics references, the possibility is discussed that the magnetic fine structure can provide the initial model message for the engineering geology casualty numerical modeling, and the initial knowledge is built that the magnetic fine structure can provide more messages than the field character for fault and lithosome in three dimensions.