喜马拉雅及邻区的莫氏面起伏与上地幔密度异常

UNDULATION OF MOHO INTERFACE AND DENSITY ANOMALY OF UPPER MANTLE UNDER THE HIMALAYAS AND VICINITY

提出了一种新的重力资料３维反演方法，并运用该方法使用布格异常对喜马拉雅及其邻区进引了反演，给出了该区域内莫氏面的大尺度变化图象和上地幔异常密度的分布。结果显示，喜马拉雅山脊带虽然海拔很高，但其地壳厚度较小。

A new method of 3-D inversion with the gravity data is presented.Using the method and taking the data of Bouguer gravity anomaly,the undulation of Moho interface and the density anomaly of upper mantle under the Himalayas and nearby regions are inversed, and the macroscale variation picture of Moho interface and the density anomaly distribution of upper mantle under these regions are given.It is shown that the thickness of the crust along the ridge of the Himalayas mountain is relatively smaller although the altitude on this region is higher.