格尔木－额济纳旗地学断面岩石图结构的磁场分析

在格尔木－额济纳旗地学断面的综合研究中，处理和解释了沿断面实测的高精度磁测剖面和大范围的航磁资料．所采用的处理方法有视磁化率填图、长波磁异常提取、方向滤波和航磁数字图像处理，并反演了地壳磁层的上、下界面深度．依据资料处理结果，对研究区内构造断裂的分布、不同地体和构造单元的划分与边界位置及岩浆活动性等都提出了新的认识．利用位场模拟方法，得出了代表格尔木－额济纳旗地学断面内地壳结构的磁模型．

MAGNETIC DATA INTERPRETATION OF THE CRUSTAL STRUCTURE OF THE GEOSCIENCE TRANSECTION FROM GOLMUD TO EJIN QI

In the integration of geological and geophysical investigation of the Geoscience Transection from Golmud to EJin Qi and its adjacent area,we processed and analyzed a long highprecision ground magnetic profile,which we surveyed in 1992,and aeromagnetic data in a large area.The techniques that we employed during our investigation include apparent susceptibility mapping,extraction of long wavelength anomaly,directional filtering,inversion for the depths of upper and lower interfaces of magnetic basement,as well as digital image processing of the aeromagnetic data.Upon the results of processing,new geological views were presented about the locations of the main fault zones,the boundaries between different terrains and structural units,the boundary between the southern and northern continents,and the magmatic activities in the whole studied region.With a potential modeling method,we got a magnetic model,which represents the crustal structure along the GGT from Golmud to Ejin Qi.