PRELIMINARY STUDY ON THE SEISMOTECTONICS OF YAO'AN & DAYAO MODERATE STONG EARTHQUAKE AREA

doi:10.3969/j.issn.0253-4967.2009.03.014

SEISMOLOGY AND GEOLOGY ›› 2009, Vol. 31 ›› Issue (3): 536-543.DOI: 10.3969/j.issn.0253-4967.2009.03.014

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PRELIMINARY STUDY ON THE SEISMOTECTONICS OF YAO'AN & DAYAO MODERATE STONG EARTHQUAKE AREA

ZHANG Jian-guo^1,2, LIU Li-fang², LI Xi², XIE Ying-qing²

1. School of Earth and Space, University of Science and Technology of China, Hefei 230026, China;
2. Earthquake Administration of Yunnan Province, Kunming 650224, China

Received:2009-08-09 Revised:2009-08-30 Online:2009-09-09 Published:2009-12-11

姚安、大姚中强震区地震构造初析

张建国^1,2, 刘丽芳², 李西², 谢英情²

1. 中国科学技术大学地球和空间科学学院, 合肥, 230026;
2. 云南省地震局, 昆明, 650224

作者简介:张建国,男,1962年生,1989年在国家地震局地质研究所获硕士学位,正高级工程师,主要从事地震地质与工程地震研究,电话:0871-5747069,E-mail:lakesidemountain@163.com.
基金资助:
云南省科技计划项目“中越红河断裂带地震活动性与地震构造特征对比研究”(2002GH10);“城市地震安全关键技术应用与示范研究”(2007CA002);中国地震局地震行业科研专项“宁洱6.4级地震现场综合考察研究”资助

Abstract

Abstract: Analyses based on investigation of the seismic intensity and digital seismic data by mobile observation on-site from the Yao'an M6.0 Earthquake that occurred on 9th July 2009 in Yao'an county,Yunnan Province,and on the spatial distribution of earthquake sequences,focal mechanisms,and intensity distribution of other three earthquakes that occurred since 2000 in the same area with the similar magnitude,show that there are obviously different characteristics in earthquake focal depth,direction of the long axis of isoseismal lines,major trend of sequence spatial distribution,and so on of the four earthquakes. Comprehensive analyses combined with data from petroleum seismic exploration show that the regional seismotectonic setting is very complicated,featured by seismotectonics interweaved with different strikes and faulted structures coupling at different depths in Yao'an area.

Key words: Yao’an earthquake, petroleum seismic exploration, buried fault, coupling between deep and shallow structures

摘要： 对2009年7月9日云南姚安6.0级地震烈度考察和现场流动数字地震观测资料,以及自2000年以来在该地区发生的其它3次6级地震序列空间展布、震源机制、烈度分布资料的分析表明,该地区4次6级地震在震源深度、等震线长轴、序列优势空间分布等方面都具有各自的特点。结合石油部门提供的地震勘探资料综合分析认为,该地区地震构造背景十分复杂,突出表现为多方向地震构造的交织,且可能存在不同深度层次断裂构造的耦合。

关键词: 姚安地震, 石油地震勘探, 隐伏断层, 深浅耦合

CLC Number:

P315.2

ZHANG Jian-guo, LIU Li-fang, LI Xi, XIE Ying-qing. PRELIMINARY STUDY ON THE SEISMOTECTONICS OF YAO'AN & DAYAO MODERATE STONG EARTHQUAKE AREA[J]. SEISMOLOGY AND GEOLOGY, 2009, 31(3): 536-543.

张建国, 刘丽芳, 李西, 谢英情. 姚安、大姚中强震区地震构造初析[J]. 地震地质, 2009, 31(3): 536-543.

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PRELIMINARY STUDY ON THE SEISMOTECTONICS OF YAO'AN & DAYAO MODERATE STONG EARTHQUAKE AREA

姚安、大姚中强震区地震构造初析

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