邢台地区地壳各向异性特征初步研究

Abstract

Abstract: Xingtai region is located in the south of north China plain belt, and the geological structure is complicated in this area. Based on the SAM method and data (2001-1—2014-12) from Hebei Seismic Network, the seismic anisotropy in Xingtai region is obtained. The average polarization of fast shear-wave is 73.9°±40.2°, and the average time delay of slow shear-wave is (2.74±1.54) ms/km. It is shown that the avaerge polarization of fast shear-wave is consistent with the regional maximum horizontal principal compressional stress. But because of the local faults, the polarization of fast shear-wave of some sites are NWW, more data is needed to explain the phenomenon.

Key words: Shear-wave splitting, Fast shear-wave splitting polarition, Slow shear-wave splitting, Xingtai region

CLC Number:

P315.7

WU Peng,LI Xiang-ping,GAO Yuan,SHI Yu-tao,LIU Li-shen. Prelimitary Study of Crustal Anisotropy in the Xingtai Region, Hebei Province[J]. EARTHQUAKE, 2017, 37(1): 73-81.

References

[1] 吴晶, 高原, 石玉涛, 太龄雪, 等. 太行山山前断裂西南段地壳介质各向异性特征浅析[J]. 地震, 2008, 28(2): 115-122.
[2] 张辉, 高原, 石玉涛, 等. 基于地壳介质各向异性分析青藏高原东北缘构造应力特征[J]. 地球物理学报, 2012, 55(1): 95-104.
[3] Gao Y, Wu J, Fukao Y, et al. Shear wave splitting in the crust in North China: stress, faults and tectonic implications[J]. Geophys J Int, 2011, 187(2): 642-654.
[4] 吴晶, 高原, 石玉涛, 等. 基于地壳介质各向异性分析江苏及邻区构造应力特征[J]. 地球物理学报, 2010, 53(7): 1622-1630.
[5] Gao Y, Crampin S. Observation of stress relaxation before earthquake[J]. Geophys J Int, 2004, 157(2): 578-582.
[6] Gao Y, Shi Y-T, Wu J, et al. Shear-wave splitting in the crust: regional compressive stress from polarizations of fast shear-wave[J]. Earthquake Science, 2012, 25(1): 35-45.
[7] 张宏志, 刁桂苓, 赵英萍, 等. 邢台地区近年的震源机制[J]. 大地测量与地球动力学, 2007, 27(6): 91-95.
[8] 赵博, 高原, 石玉涛, 等. 用双差定位结果分析华北地区的地震活动[J]. 地震, 2013, 33(1): 12-21.
[9] 黄骥超, 万永革. 利用小震与强震震源机制解反演首都圈现今构造应力场[J]. 地震, 2015, 35(1): 17-27.
[10] 李钦祖. 华北地壳应力场的基本特征[J]. 地球物理学报, 1980, 23(4): 376-388.
[11] 李钦祖, 靳雅敏, 于新昌, 等. 华北地区的震源机制与地壳应力场[J]. 地震学报, 1982, 4(1): 55-61.
[12] 高原, 刘希强, 梁维, 等. 剪切波分裂系统分析方法(SAM)软件系统[J]. 中国地震, 2004, 20(1): 101-107.
[13] Crampin S, Peacock S. A review of shear-wave splitting in the complicant crack-critical anisotropic Earth[J]. Wave Motion, 2005, 41: 59-77.
[14] 高原、吴晶、易桂喜、石玉涛. 从壳幔地震各向异性初探华北地区壳幔耦合关系[J]. 科学通报, 2010, 55(29): 2837-2843.
[15] 黄禄渊, 杨树新, 崔效峰, 等. 华北地区实测应力特征与断层稳定性分析[J]. 岩土力学, 2013, 34(1): 204-213.
[16] 许忠淮. 东亚地区现今构造应力图的编制[J]. 地震学报, 2001, 23(5): 492-501.

Prelimitary Study of Crustal Anisotropy in the Xingtai Region, Hebei Province

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