IDEAS home Printed from https://ideas.repec.org/a/spr/nathaz/v103y2020i1d10.1007_s11069-020-04040-6.html
   My bibliography  Save this article

Segmentation of the Kepingtage thrust fault based on paleoearthquake ruptures, southwestern Tianshan, China

Author

Listed:
  • An Li

    (China Earthquake Administration
    China Earthquake Administration)

  • Yongkang Ran

    (China Earthquake Administration)

  • Francisco Gomez

    (University of Missouri)

  • Jessica A. Thompson Jobe

    (Colorado School of Mines)

  • Huaguo Liu

    (China Earthquake Disaster Prevention Center)

  • Liangxin Xu

    (Earthquake Administration of Shanxi Province)

Abstract

Decreasing deformation rates across the southern Tianshan have led to different seismogenic mechanisms and different proposed models to explain the orogen-scale fault kinematics. In this study, we focus on the segmentation of the Kepingtage fault by studying variations in the total offset and shortening rates of the Kepingtage fault along the southern front of the Tianshan. We used fault scarp mapping and trench excavations to assess fault segmentation and deformation on the Kepingtage fault. Our results indicate there are different shortening rates on the western (2.5–2.7 mm/year) versus the eastern segments (~ 0.3 mm/year), which are separated by the Piqiang tear fault. The decrease in shortening rates is not gradual; instead, it decreases sharply from west to east at the Piqiang fault. These segmentation boundaries are also supported by geodetic data and balanced structural restorations. Our data support a model where strike-slip faults accommodate step-changes in the deformation rates and the earthquake risks from west to east across the Tianshan.

Suggested Citation

  • An Li & Yongkang Ran & Francisco Gomez & Jessica A. Thompson Jobe & Huaguo Liu & Liangxin Xu, 2020. "Segmentation of the Kepingtage thrust fault based on paleoearthquake ruptures, southwestern Tianshan, China," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 103(1), pages 1385-1406, August.
    • Handle: RePEc:spr:nathaz:v:103:y:2020:i:1:d:10.1007_s11069-020-04040-6
    DOI: 10.1007/s11069-020-04040-6
    as

    Download full text from publisher

    File URL: http://link.springer.com/10.1007/s11069-020-04040-6
    File Function: Abstract
    Download Restriction: Access to the full text of the articles in this series is restricted.
    File URL: https://libkey.io/10.1007/s11069-020-04040-6?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:spr:nathaz:v:103:y:2020:i:1:d:10.1007_s11069-020-04040-6. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Sonal Shukla or Springer Nature Abstracting and Indexing (email available below). General contact details of provider: http://www.springer.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.