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Journal of Mountain Science

, Volume 13, Issue 5, pp 906–916 | Cite as

GiT-based structural geologic feature analysis of the southern segment of Longmenshan fault zone for earthquake evidence

  • Cheng-ming YeEmail author
  • Peng Cui
  • Saied PirastehEmail author
  • Jonathan Li
  • Qingkai Meng
  • Xiao-jia Bi
  • Jian-qiang Zhang
Article
  • 61 Downloads

Abstract

The Longmenshan fault is a thrust fault which runs along the base of the Longmen Mountains in Sichuan province, southwestern China. The southern segment of the fault had two distinct responses to the Ms 8 Wenchuan and Ms 7 Lushan earthquakes. This study determines characteristics of the structural geology of the Longmenshan fault to evaluate how it influenced the two aforementioned earthquakes. This research was done within a Geo-information Technologies (GiT) environment based on multi-source remote sensing and crustal movement data extracted from the Global Positioning System (GPS). The spatial distribution of the southern segment of the Longmenshan fault zone was comprehensively analyzed to study both earthquakes. The study revealed that the Wenchuan and Lushan earthquakes occurred on two relatively independent faults. In addition, there was a nearly constant-velocity crustal movement zone between the two epicenters that probably had a compressive stress with slow motion. Furthermore, the central fault and a mountain back fault gradually merged from north to south. The Lushan earthquake was not an aftershock of the Wenchuan earthquake. The research showed that fault zones within 30–50 km of State Highway 318 are intensive and complex. In addition, crustal movement velocity decreased rapidly, with a strong multi-directional shear zone. Thus, activity in that zone was likely stronger than in the northern part over the medium to long term.

Keywords

Longmenshan fault zone Geo-information Technologies (GiT) Remote Sensing (RS) Earthquake Crustal movement 

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Copyright information

© Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Cheng-ming Ye
    • 1
    • 2
    Email author
  • Peng Cui
    • 1
  • Saied Pirasteh
    • 3
    Email author
  • Jonathan Li
    • 3
  • Qingkai Meng
    • 2
  • Xiao-jia Bi
    • 4
  • Jian-qiang Zhang
    • 1
  1. 1.Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengduChina
  2. 2.Key Lab. of Earth Exploration and Information Technology of Ministry of EducationChengdu University of TechnologyChengduChina
  3. 3.Department of Geography and Environmental Management, Faculty of EnvironmentUniversity of WaterlooWaterloo, Ontario, CanadaCanada
  4. 4.Chengdu Earthquake Mitigation BureauChengduChina

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