Numerical modelling of the stress in the Pamir-Hindu Kush region

作     者：Ikram Atabekov Mirzoid Muminov Aziz Atabekov Ikram Atabekov;Mirzoid Muminov;Aziz Atabekov

作者机构：Institute of SeismologyTashkent100128Uzbekistan National University of UzbekistanTashkent100174Uzbekistan 

出 版 物：《Geodesy and Geodynamics》 (大地测量与地球动力学（英文版）)

年 卷 期：2022年第13卷第1期

页      面：83-91页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：This work was supported by grants from the Ministry of Inno-vation of Uzbekistan(No.8-007 and No.20170918111) 

主　　题：Pamir-hindu kush Stress state Mantle earthquakes Boundary element method 

摘      要：The current stress state of the Earth s crust in Central Asia depends entirely on the interaction of the Eurasian plate with the Indian and Arabian ***,an essential role in this action is played by the subduction process in the Pamir-Hind Kush *** this region,deep earthquakes and anomalies in seismic velocities indicate subduction of the Indian *** determine the effect of earthquakes on the stress state of the Earth s crust in Central Asia,we analyzed the hypocenters according to the available data over a hundred *** the envelope of the hypocenters as the surface of the subducted indenter,we analyzed its penetration into the *** of the pushing force of the indenter,the velocity of the Indian plate is taken into consideration.A model of the stresses is constructed on the equations of creeping motion of a viscous incompressible *** stress variation in the Earth s crust and mantle was calculated as the stress difference before and after the *** mechanism of earthquakes is modelled by an introduction of equivalent volume forces in the equilibrium equations corresponding to a couple dipoles without a *** equations of creeping motion are numerically solved using boundary element *** experiments with different physical model pa-rameters for the Earth s crust and mantle were *** introduce the negative buoyancy of the subducting plate,partial eclogitization of the rocks in the collision zone was *** a result,a certain combination of stiffness and density was determined for the lithosphere and mantle,which explained the peculiarities of this *** influence of crustal and mantle earthquakes in the Pamir-Hindu Kush region on the change in background stresses in Central Asia was analyzed which are not higher than 2-3%.