2013年甘肃岷县漳县6.6级地震触发滑坡及其构造分析

doi:10.3969/j.issn.0253-4967.2013.03.015

地震地质 ›› 2013, Vol. 35 ›› Issue (3): 616-626.DOI: 10.3969/j.issn.0253-4967.2013.03.015

• 岷县漳县M_S6.6地震科考 • 上一篇下一篇

2013年甘肃岷县漳县6.6级地震触发滑坡及其构造分析

许冲¹, 徐锡伟¹, 郑文俊², 闵伟¹, 任治坤², 李志强¹

1. 中国地震局地质研究所, 活动构造与火山重点实验室, 北京 100029;
2. 中国地震局地质研究所, 地震动力学国家重点实验室, 北京 100029

收稿日期:2013-08-11 修回日期:2013-08-27 出版日期:2013-09-30 发布日期:2013-10-12
作者简介:许冲,男,1982年生,副研究员,研究方向为地震滑坡与活动构造,E-mail:xc11111111@126.com;xuchong@ies.ac.cn。
基金资助:
国家自然科学基金(41202235,91214201)和中国地震局地质研究所基本科研业务专项 (IGCEA1215,IGCEA1302)共同资助

LANDSLIDES TRIGGERED BY THE 2013 MINXIAN-ZHANGXIAN, GANSU PROVINCE M_S 6.6 EARTHQUAKE AND ITS TECTONIC ANALYSES

XU Chong¹, XU Xi-wei¹, ZHENG Wen-jun², MIN Wei¹, REN Zhi-kun², LI Zhi-qiang¹

1. Key Laboratory of Active Tectonics and Volcano, Institute of Geology, China Earthquake Administration, Beijing 100029, China;
2. State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029, China

Received:2013-08-11 Revised:2013-08-27 Online:2013-09-30 Published:2013-10-12

摘要/Abstract

摘要：

2013年7月22日,甘肃省岷县漳县交界发生了M_S 6.6地震。地震触发了大量的、类型各种各样的滑坡。滑坡类型以黄土崖崩、滑、倾为主,还有一些深层连贯型土质滑坡、大型土质流滑、斜坡裂缝等类型。地震滑坡主要分布在一个与临潭-宕昌断裂平行的长条形区域内。该长条形区域面积约为250km²,长度约40km,最大宽度约8km。对应不同构造段落的区域内滑坡发育程度不同,反映了不同段落发震构造的特征差异。滑坡的主体分布范围与震中位置表明了构造破裂是从SEE向NWW方向发展的。最后,分析了该滑坡主体分布区中心线与临潭-宕昌断裂在空间地理位置上相差10km的2种可能的原因。

关键词: 岷县漳县M_S6.6地震, 滑坡, 滑坡分类, 构造分析

Abstract:

On July 22,2013,an earthquake of M_S 6.6 occurred at the boundary between Minxian County and Zhangxian County,Gansu Province of China. Many landslides were triggered by the earthquake and the landslides were of various types,mainly in falls,slides,and topples occurring on loess cliffs,and also including soil deep-seated coherent landslides,large-scale soil avalanches,and slopes with cracks. Most of the landslides were distributed in an elongated area of 250km²,parallels to the Lintan-Dangchang Fault, with about 40km in length and the largest width of 8km. Landslides occurrence shows obvious difference along the central line of the elongated area,corresponding to different characteristics of different segments of the seismogenic fault. The elongated landslides main distribution area and the location of the epicenter indicate that the direction of the fault rupture propagation is from southeast-east to northwest-west. Finally,two probable reasons causing the horizontal distance of about 10km between the central line of the elongated area and the Lintan-Dangchang Fault are presented.

Key words: Minxian-Zhangxian M_S 6.6 earthquake, landslides, landslide classification, tectonic analyses

中图分类号:

P315.9

许冲, 徐锡伟, 郑文俊, 闵伟, 任治坤, 李志强. 2013年甘肃岷县漳县6.6级地震触发滑坡及其构造分析[J]. 地震地质, 2013, 35(3): 616-626.

XU Chong, XU Xi-wei, ZHENG Wen-jun, MIN Wei, REN Zhi-kun, LI Zhi-qiang. LANDSLIDES TRIGGERED BY THE 2013 MINXIAN-ZHANGXIAN, GANSU PROVINCE M_S 6.6 EARTHQUAKE AND ITS TECTONIC ANALYSES[J]. SEISMOLOGY AND GEOLOGY, 2013, 35(3): 616-626.

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2013年甘肃岷县漳县6.6级地震触发滑坡及其构造分析

LANDSLIDES TRIGGERED BY THE 2013 MINXIAN-ZHANGXIAN, GANSU PROVINCE M_S 6.6 EARTHQUAKE AND ITS TECTONIC ANALYSES

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2013年甘肃岷县漳县6.6级地震触发滑坡及其构造分析

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