南海地区岩石圈有效弹性厚度估计

分析了测高卫星同时应用于重力模型和地形模型时对计算南海地区岩石圈有效弹性厚度的影响，该影响可能会高估有效弹性厚度值。对比多项研究认为，南沙群岛地区岩石圈的有效弹性厚度约为9 km。通过对南海地区岩石圈的有效弹性厚度分布进行计算发现，南海海盆的有效弹性厚度最小约为4 km，南海周边的有效弹性厚度值较高，与海底岩石圈年龄的空间分布有较强的相关性，符合南海海盆扩张的历史。

Estimation of the Effective Elastic Thickness of the Lithosphere in the South China Sea

We analyze the effect of altimetry satellites applied to the gravity and terrain models simultaneously on the calculation of effective elastic thickness in the South China Sea. This effect may overestimate the effective elastic thickness. Comparing multiple studies, we infer that the effective elastic thickness in the Nansha islands is 9 km. By calculating the effective elastic thickness distribution in the South China Sea, we find that the minimum effective elastic thickness of the South China Sea basin is about 4 km, and the effective elastic thickness around the South China Sea is relatively high, with strong correlation to the spatial distribution of the age of the submarine lithosphere. It also conforms to the history of the expansion of the South China Sea basin.