2023年12月19日，巴西阿尔塔米拉帕联邦学院Nelson Ribeiro-Filho小组在《大地测量与地球动力学》杂志发表论文，报道通过均衡扰动之间的相互关系来确定有效弹性厚度。

研究人员使用给定的地形数据集计算了特定的弹性厚度下，地壳的垂直挠曲值。通过计算研究确定了地形引起的重力扰动变化，并生成弹性厚度参数值网络。随后，将重力观测数据(代表实际地表数据)与正演模拟计算数据进行移动关联。特定点的最佳弹性厚度对应于最高的相关系数。研究人员在合成数据上对该方法进行了测试，结果显示，合成深度与原始深度(包括弹性厚度值)非常接近。

为了验证结果，研究人员将所描述的过程应用于Barreirinhas盆地（位于巴西东北部地区）的真实数据集中。结果表明，所得到的地壳深度与已知模型的深部高度相关。此外，研究人员还注意到弹性厚度的行为与预期的一样，从大陆向海洋递减。基于研究所得结果，该方法有可能被用于直接估算任何区域的地层深度和弹性厚度。

附：英文原文

Title: Determining the effective elastic thickness through cross-correlation between isostatic disturbances

Author: anonymous

Issue&Volume: 2023/12/19

Abstract: The elastic thickness parameter was estimated using the mobile correlation technique between the observed isostatic disturbance and the gravity disturbance calculated through direct gravimetric modeling. We computed the vertical flexure value of the crust for a specific elastic thickness using a given topographic dataset. The gravity disturbance due to the topography was determined after the calculation. A grid of values for the elastic thickness parameter was generated. Then, a moving correlation was performed between the observed gravity data (representing actual surface data) and the calculated data from the forward modeling. The optimum elastic thickness of the particular point corresponded to the highest correlation coefficient. The methodology was tested on synthetic data and showed that the synthetic depth closely matched the original depth, including the elastic thickness value. To validate the results, the described procedure was applied to a real dataset from the Barreirinhas Basin, situated in the northeastern region of Brazil. The results show that the obtained crustal depth is highly correlated with the depth from known models. Additionally, we noted that the elastic thickness behaves as expected, decreasing from the continent towards the ocean. Based on the results, this method has the potential to be employed as a direct estimate of crustal depth and elastic thickness for any region.

DOI: 10.1016/j.geog.2023.10.003

Source: https://www.sciencedirect.com/science/article/pii/S167498472300099X