Abstract:We calculate vertical integrated horizontal deviatoric stresses by solving force balance equations in a thin sheet approximation involving gravitational potential energy terms through a finite element method. GPE values, eliminated the effects of dynamic topography, are derived from the Crust 1.0 model, the V24.1 gravitational model and the V18.1 topography model data sets. The results show that GPE in north China area presents aspatially heterogeneous distribution. Areas in high values of GPE are tensile, whereas compression exists in regions of low values of GPE. The GPE shows high values occurring at the north central area of Yinshan mountain-Yanshan mountain fault block, where the direction of maximal horizontal tensile stress is N-S. The orientation of maximal horizontal principal compressional stress in low values of GPE, such as the northeast and southwest of the north China plain block and the north areas of central Hehuai plain, is dominated by NWW-EES.
LI Zhongya,HU Minzhang,LI Hui. Research on Horizontal Tectonic Stress Distribution Contributed by Gravitational Potential Energy Differences in North China Area[J]. jgg, 2017, 37(9): 908-912.