ANALYSIS ON THE EVOLUTION OF SEISMIC VELOCITY STRUCTURE AT THE SOUTHERN END OF TAIHANG MOUNTAINS FAULT ZONE

doi:10.3969/j.issn.0253-4967.2011.01.010

SEISMOLOGY AND GEOLOGY ›› 2011, Vol. 33 ›› Issue (1): 107-113.DOI: 10.3969/j.issn.0253-4967.2011.01.010

• Research Paper • Previous Articles Next Articles

ANALYSIS ON THE EVOLUTION OF SEISMIC VELOCITY STRUCTURE AT THE SOUTHERN END OF TAIHANG MOUNTAINS FAULT ZONE

ZHOU Jun-jie^1,2, WANG Yu¹, ZHANG Jing-sen¹, ZHOU Long-quan³

1. Hebei University of Engineering, Handan 056038, China;
2. Key Laboratory of Resource Survey and Research of Hebei Province, Handan 056038, China;
3. China Earthquake Networks Center, Beijing 100045, China

Received:2010-05-20 Revised:2010-08-26 Online:2011-04-29 Published:2011-12-18

太行山断裂带南端的地震纵波速度结构分析

周俊杰^1,2, 王雨¹, 张景森¹, 周龙泉³

1. 河北工程大学,邯郸 056038;
2. 河北省资源勘测重点实验室,邯郸 056038;
3. 中国地震台网中心,北京 100045

作者简介:周俊杰,男,1976年生,2000年毕业于中国地质大学(武汉),2006年毕业于河北工程大学资源学院,获硕士学位,讲师,主要从事地球物理探测和构造地质方面的教学与研究,电话: 0310-8579542,E-mail: ansanzhou 7684@163.com。
基金资助:
河北省教育厅"河北南部矿产资源开发环境效应研究"项目(Z2008202)资助。

Abstract

Abstract:

The activity of fault is one of the causes of earthquakes.The distribution of the velocity structure of small earthquakes on the fault structure can offer an accurate underground crust structure model for us to analyze the activity of fault.Using the seismic network monitoring data at the southern end of the Taihang Mountains and the small earthquake P wave travel time data,the paper reconstructs the three-dimensional velocity structure model for the southern end of the Taihang Mountains Fault zone by joint inversion of seismic source and velocity structure.The results show: on the west of Taihang Mountain piedmont fault zone,there exists a NNE-trending fault.Horizontal distribution shows a zonal distribution of low velocity zone along the fault zone.The thickness of the sedimentary layer in Taihangshan uplift has reduced gradually from approximately 8km to about 2km,while under the force from the western side,the crust thickens gradually.

Key words: Taihang Mountains Fault zone, seismic wave, velocity structure, inversion

摘要：

断裂构造的活动是地震的成因之一。断裂构造上的小震速度结构分布为人们准确提供了地下壳质结构模型,为断裂的活动性分析提供了依据。文中结合太行山南端的地震台网监测资料,利用小震P波走时数据,通过震源和速度结构的联合反演,确定了太行山断裂构造南端的三维速度结构模型。结果表明: 太行山山前断裂带的西侧存在NNE向断层,速度结构平面分布显示低速区沿断裂带呈条带状分布,太行山隆起区沉积层厚度由8km左右逐渐减薄为2km左右,同时受西侧作用力的影响地壳厚度逐渐增厚。

关键词: 太行山断裂带, 地震波, 速度结构, 反演

CLC Number:

P315.3⁺¹

ZHOU Jun-jie, WANG Yu, ZHANG Jing-sen, ZHOU Long-quan. ANALYSIS ON THE EVOLUTION OF SEISMIC VELOCITY STRUCTURE AT THE SOUTHERN END OF TAIHANG MOUNTAINS FAULT ZONE[J]. SEISMOLOGY AND GEOLOGY, 2011, 33(1): 107-113.

周俊杰, 王雨, 张景森, 周龙泉. 太行山断裂带南端的地震纵波速度结构分析[J]. 地震地质, 2011, 33(1): 107-113.

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ANALYSIS ON THE EVOLUTION OF SEISMIC VELOCITY STRUCTURE AT THE SOUTHERN END OF TAIHANG MOUNTAINS FAULT ZONE

太行山断裂带南端的地震纵波速度结构分析

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