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针对青藏高原地壳-上地幔结构十分复杂的特点,利用地球重力场模型 WDM89的位系数,计算了多个阶窗的卫星重力异常,结合其他地球物理资料的初步分析表明,低阶窗的异常图形,可能反映了板块碰撞挤压所造成的深部密度重新分布的特征;中阶窗的异常,则显示出板块运动过程中可能形成的深部构造痕迹,如超壳深断裂等;高阶窗的异常图,可以与实测的空间异常图及均衡异常图相对比,它醒目地指出了青藏高原边缘一些不均衡的地带;利用多阶窗的异常图,还可指明地壳-上地幔中可能存在的岩浆室或其他地质不均匀体.
In view of the complex structure of the crust-upper mantle in the Qinghai-Tibet Plateau, the gravity anomaly of multiple-step windows is calculated by using the bit coefficients of the Earth’s gravitational field model WDM89. Based on the preliminary analysis of other geophysical data, it is shown that the low- , Which may reflect the characteristics of deep density redistribution caused by plate collision and extrusion. The anomaly of mid-stage window shows the deep structure traces that may be formed during the plate movement, such as the deep-fault of super-deep crust and so on. The abnormality of high-order window The map, which can be compared with the measured spatial anomaly map and the anomalous anomaly map, points out some imbalance zones on the edge of the Qinghai-Tibet Plateau. Using the multi-order window anomaly map, it can also indicate the possible magma in the crust-upper mantle Room or other geological heterogeneity.