球坐标系下快速正演策略在重力异常剥离中的应用OA
Application of fast forward modeling strategy in spherical coordinates to gravity anomaly strippingn
本研究提出了一种高效的Tesseroid正演建模方法,用于界面剥离,特别是在大尺度和深部研究中.通过利用三维高斯-勒让德积分(GLQ)方法,结合核矩阵的等效性,显著减少了计算时间和内存需求.该方法通过对界面深度的正演,获得了深部界面起伏对布格重力异常的影响,为精确提取地壳和地幔结构信息提供了有效手段.在南海及其邻区的应用中,该方法成功分离了莫霍面引起的重力异常,并对剥离后的剩余异常进行了分析.结果表明,通过剥离莫霍面起伏后的异常数据,可以更准确地揭示地壳及地幔的结构特征,为进一步的深部结构研究提供了有力支持.本文方法在提升计算效率的同时,也为重力异常分离技术的应用和发展提供了新的思路.
This study presents an efficient Tesseroid orthotropic modelling method for interface stripping,especially in large-scale and deep studies.By utilising a 3D Gauss-Legende integral(GLQ)method,combined with the equivalence of the kernel matrices,the computational time and memory requirements are significantly reduced.The method obtains the effect of deep interface undulations on the Bouguer gravity anomaly through the orthogonal evolution of the interface depth,which provides an effective means to accurately extract crustal and mantle structural information.In the application to the SCS and its neighbouring areas,the method successfully separates the gravity anomalies caused by the Moho surface and analyses the remaining anomalies after stripping.The results demonstrate that by eliminating the undulations of the Moho surface,the anomalous data can more precisely unveil the structural features of both the crust and mantle,offering robust substantiation for advancing studies into deep geological structures.The methodology presented in this paper introduces novel perspectives for the application and enhancement of gravity anomaly separation technology,while simultaneously augmenting computational efficiency.
LI Maoru;LI Jun;DENG Jiayue;ZHAO Guangdong;CHENG Zhipeng
College of Geophysics,Chengdu University of Technology,Chengdu 610059,China||Key Laboratory of Earth Exploration and Information Techniques,Ministry of Education,Chengdu University of Technology,Chengdu 610059,ChinaCollege of Geophysics,Chengdu University of Technology,Chengdu 610059,China||Key Laboratory of Earth Exploration and Information Techniques,Ministry of Education,Chengdu University of Technology,Chengdu 610059,ChinaCollege of Geophysics,Chengdu University of Technology,Chengdu 610059,China||Key Laboratory of Earth Exploration and Information Techniques,Ministry of Education,Chengdu University of Technology,Chengdu 610059,ChinaCollege of Geophysics,Chengdu University of Technology,Chengdu 610059,China||Key Laboratory of Earth Exploration and Information Techniques,Ministry of Education,Chengdu University of Technology,Chengdu 610059,ChinaCollege of Geophysics,Chengdu University of Technology,Chengdu 610059,China
天文与地球科学
球坐标重力界面正演Tessorid异常剥离
spherical coordinatesgravity interface orthogonalTessoridanomalous stripping
《物探化探计算技术》 2026 (1)
117-125,9
国家自然科学基金项目(4227040731)
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