【摘要】 研究表明,康滇地轴及其东部地区属均衡补偿平衡区,西部属强烈上升的异常区。上升的原动力为板块碰撞的构造力与均衡调整力的综合。更多还原

【Abstract】 Using Airy’s and Pratt’s isostatic hypotheses, isostatic anomalies were calculated for part of the Pan-Xi Rift zone, and isocorrection line map was drawn. Five major gradient belts were divided and statistically correlated with the earthquake frequencies in each of the respective belts. After considering the depths of the Mohorovicic discontinuity and the deep structural division in this area, four isostatic anomaly areas were divided. It shows that the Xikang-Yunnan land axis and the part to its east are an isostatic equilibrium area and the Western area is a strongly up rising area due to the collision of plates and isostatic adjustment. Using three different methods the depths of Mohorovicic discontinuity along two profiles across Xikang-Yunnan land axis and Longmen Mountain, were calculated which further verified the above interpretation.更多还原