地震地磁观测与研究Issue(5)：1-7,7.DOI:10.3969/j.issn.1003-3246.2015.05.001
利用接收函数研究太行山前断裂南部地区地壳厚度
Study on the crustal thickness in the south of the piedmont fault zone of Taihang mountains by teleseismic receiver function
摘要
Abstract
In this paper,we calculate receiver functions of body wave under the stations in the south of the piedmont zone of the piedmont fault zone of Taihang mountains from 3-component digital waveform data of teleseismic earthquake events and obtain the thickness and vP/vS radio in the crust of this area with H-Kappa stacking. The results show that: (1) Crustal thickness in the west of this area is thicker than that in the east. in general; The Moho tilts westward with small angle;In the western Changzhi basin,the crustal thickness is 40.2 km,the thinner crust in eastern plain area is 31.8 km,changes in the earth's crust gap is about 9 km. (2) In Taihang mountains and the plain transition zone,especially along the outer edge of the main peak of Taihang Mountains arc distribution,namely near the boundary between first-level planation surface and second-level planation surface,the crust thickness changes quickly. (3) The crustal thickness calculated by teleseismic receiver function is in agreement with the artificial seismic exploration result,the crust of Taihang mountains uplift area becomes thick,that of Tangyin rift valley becomes thin,and that of Neihuang uplift area becomes thick,which shows that the depth of Moho or upper mantle’s height is symmetrical with the height of the ground. (4) Poisson ratio in the district is about 0.23-0.27,which indicates that the underground material in the area is mainly composed of intermediate acidic rocks,especially the widely distributed granite with much quartz,feldspar.关键词
接收函数/地壳厚度/H-Kappa/叠加Key words
receiver function/crustal structure/H-Kappa/stacking引用本文复制引用
陈睿,闫俊岗,闫楷,万娜,张予川..利用接收函数研究太行山前断裂南部地区地壳厚度[J].地震地磁观测与研究,2015,(5):1-7,7.基金项目
河南省地震局2014年科研基金资助 （）
