Moho面扰动重力梯度信息的提取

The Signal Extraction of Gravity Gradient Disturbance on Moho

在运用重力和重力梯度资料反演Moho面时,关键步骤之一即是从原始测量信号精确提取只包含该层面单一密度信息的扰动(异常)值。本文主要工作有:1为减小GEMMA Moho团队的点质量模型计算误差而采用正演精度更高的空间域Tesseroid单元体和频谱域球谐分析与综合方法,并对这两种方法进行了结果对比;2如何合理利用地壳先验模型资料。本文中最后提供了基于GOCO03S模型可以用于后续Moho面反演的重力梯度主对角线分量的全球扰动值,并对所有试验数据进行了讨论和分析。

Using gravity/gravity gradient data for Moho inversion,one of the key steps is how to extract the Moho information data precisely from raw measurements.Here we mainly discussed:1In order to eliminate the error of point mass model used by GEMMA Moho research team,we choose Tesseroid in space domain and harmonic analysis and synthesis method in frequency domain;2The reasonable use of priori crustal model.Based on GOCO03 Smodel,we provide the gravity gradient disturbing results of three main components which are for Moho inversion.Finally,all experiment results are discussed and analyzed in this paper.