亚速尔群岛是大西洋中脊一个扩散中心,研究其内部的动力学作用机制是当前的研究热点.基于高精度的地球重力场模型计算得到的自由空气重力异常与最新的全球地形模型,进行频谱分析,克服传统频谱分析方法中频谱泄露的缺陷,采用多窗口的算法,计算了亚速尔群岛的弹性厚度,研究结果表明该地区海底岩石圈是比较年轻的,地壳厚度为12km,弹性厚度为5km. The Azores, a diffusion center of the mid-Atlantic ridge, is the current research hotspot in the study of its internal dynamical mechanism.According to the free-air gravity anomaly calculated by the high-precision Earth’s gravity field model and the latest global topographic model, The results show that the seafloor lithosphere in this area is relatively young with a crustal thickness of 12km and an elastic thickness of 5km.