基于弹性薄片格林函数的GPS应变求解方法对青藏高原东北缘三维构造变形特征的研究

基于弹性薄片格林函数的GPS三维应变求解方法，对青藏高原东北缘地区的构造变形特征进行研究。结果表明，青藏高原东北缘的应变主要集中在边界断裂上，而在断裂之间的内部块体应变分布相对较小，垂直应变最大值位于日月山断裂以东和海原断裂以南的区域，与块体旋转及物质东向运移有关，且很可能受中下地壳流的影响。本文用三维GPS应变分析为理解大陆内部构造变形动力学过程提供了新的视角。

Contemporary Crustal Deformation within Northeast Tibet Constraintfrom 3-Dimensional GPS Strain Analysis Based on theGreen Function of Elastic Thin Sheet

This research aims at the contemporary crustal deformation of northeast Tibet using the GPS three-dimensional strain analysis method, based on the Green function of elastic thin sheet. This study shows that the characteristic of crustal deformation in northeast Tibet is predominated by the NE-SW convergence along the strike-slip fault, while in the blocks between the faults the strain is relatively low. Meanwhile, the vertical strain is very high in the east of Riyueshan fault and south of Haiyuan fault, which may be related to the block rotation and eastward extrusion partitioned by the crustal shortening, as well as the middle-lower crustal flow. Our research provides a new perspective for understanding the dynamic process of tectonic deformation in the continental interior.