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Volume 27 Issue 6
Nov 2016
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Journal of Earth Science  > 2016  >  27(6): 971-980.
Amir Barzegari, Rasoul Esmaeili, Mohammad Ebrahimi, Ali Faghih, Manucher Ghorashi, Hamid Nazari. Evaluation of slip rate on Astara fault system, North Iran. Journal of Earth Science, 2016, 27(6): 971-980. doi: 10.1007/s12583-016-0680-x
Citation: Amir Barzegari, Rasoul Esmaeili, Mohammad Ebrahimi, Ali Faghih, Manucher Ghorashi, Hamid Nazari. Evaluation of slip rate on Astara fault system, North Iran. Journal of Earth Science, 2016, 27(6): 971-980. doi: 10.1007/s12583-016-0680-x
shu

Evaluation of slip rate on Astara fault system, North Iran

doi: 10.1007/s12583-016-0680-x
  • 1.

    Depatment of Geology, Faculty of Sciences, Islamic Azad University North Tehran Branch, Tehran, 1651153311, Iran

  • 2.

    State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China

  • 3.

    University of Chinese Academy of Sciences, Beijing, 100049, China

  • 4.

    Department of Geology, Faculty of Sciences, University of Zanjan, Zanjan, 4537138791, Iran

  • 5.

    Department of Earth Sciences, College of Sciences, Shiraz University, Shiraz, 71454, Iran

  • 6.

    Geological Survey of Iran, Tehran, 131851494, Iran

  • 7.

    Research Institute for Earth Sciences, Geological Survey of Iran, Tehran, 131851494, Iran

More Information
  • Corresponding author: Amir Barzegari, barzegariamir@yahoo.com
  • Received Date: 13 May 2016
  • Accepted Date: 07 Sep 2016
  • Publish Date: 01 Dec 2016
    Abstract
  • Due to its strategic location, the Astara fault system (AFS), which is located in Iran, has given rise to a number of earthquakes. In spite of its frequent seismic events, limited information is available for AFS. Slip rate is one of the important variables for future scrutiny of seismic risk of this fault system. The main objective of this research is to study slip rates at intermediate and short terms for this fault system using geological, geodetic observations and empirical method. Using the geological data, the intermediate-term horizontal and vertical slip rates for AFS have been determined to be 2.8±0.2 and 0.27±0.03 mm/year, respectively. In addition, the short-term slip rates of the fault, based on the geodetic method (using displacement values of two GPS stations: HASH and DAMO) and assuming attenuation of 60% (to fold the sediment of South Caspian Basin and shortening of Talesh Mountain range), determined to be 1.23±0.03 and 2.05±0.05 mm/year for the horizontal and vertical slips, respectively. Finally, evaluation of the slip rate using empirical relationship yields 10 mm/year for the entire fault system, which seems rather implausible.

     

    • Electronic Supplementary Materials: Supplementary materials (Tables S1 and S2) are available in the online version of this article at http://dx.doi.org/10.1007/s12583-016-0680-x.
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