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利用岩石圈挠曲均衡原理,联合海底地形模型和测高重力异常数据,采用滑动窗口导纳技术(moving window admittance technique,MWAT)计算了全球1°×1°海洋岩石圈有效弹性厚度模型。结果表明,海洋岩石圈有效弹性厚度总体较小,10km以下区域约占70%,15km以下约占85.4%,均值和标准差分别约为10km和6.7km。岩石圈有效弹性厚度20km以上的区域主要位于海沟外隆地区,洋中脊岩石圈有效弹性厚度一般小于5km;被动大陆边缘,如澳洲大陆南缘,岩石圈有效弹性厚度一般也较小;太平洋的海山密集分布地区,岩石圈有效弹性厚度一般为10~20km。
Based on the principle of lithosphere deflection equilibrium, combined with seabed topographic model and gravity anomaly data, the effective elastic thickness model of 1 ° × 1 ° ocean lithosphere in the world was calculated by using the sliding window admittance technique (MWAT). The results show that the effective elastic thickness of the oceanic lithosphere is generally small, accounting for 70% of the area below 10km and 85.4% below 15km, with mean and standard deviation of about 10km and 6.7km respectively. The effective elastic thickness of the lithosphere above 20km is mainly located in the outer trench of the trench, and the effective elastic thickness of the lithosphere in the mid-ocean ridge is generally less than 5km. The effective elastic thickness of the lithosphere in the passive continental margin, such as the southern margin of the Australian continent, Seamount densely distributed areas, the effective elastic thickness of the lithosphere is generally 10 ~ 20km.