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3-D crustal structure along the North Anatolian Fault Zone in north-central Anatolia revealed by local earthquake tomography

Yolsal-Cevikbilen, Seda; Biryol, C. Berk; Beck, Susan; Zandt, George; Taymaz, Tuncay; Adiyaman, Hande E.; Ozacar, A. Arda


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{
  "@context": "https://schema.org/", 
  "@id": 88007, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "Istanbul Tech Univ, Dept Geophys Engn, Fac Mines, TR-34469 Istanbul, Turkey", 
      "name": "Yolsal-Cevikbilen, Seda"
    }, 
    {
      "@type": "Person", 
      "affiliation": "Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA", 
      "name": "Biryol, C. Berk"
    }, 
    {
      "@type": "Person", 
      "affiliation": "Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA", 
      "name": "Beck, Susan"
    }, 
    {
      "@type": "Person", 
      "affiliation": "Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA", 
      "name": "Zandt, George"
    }, 
    {
      "@type": "Person", 
      "affiliation": "Istanbul Tech Univ, Dept Geophys Engn, Fac Mines, TR-34469 Istanbul, Turkey", 
      "name": "Taymaz, Tuncay"
    }, 
    {
      "@type": "Person", 
      "affiliation": "Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA", 
      "name": "Adiyaman, Hande E."
    }, 
    {
      "@type": "Person", 
      "affiliation": "Middle E Tech Univ, Dept Geol Engn, TR-06531 Ankara, Turkey", 
      "name": "Ozacar, A. Arda"
    }
  ], 
  "datePublished": "2012-01-01", 
  "description": "3-D P-wave velocity structure and Vp/Vs variations in the crust along the North Anatolian Fault Zone (NAFZ) in north-central Anatolia were investigated by the inversion of local P- and S-wave traveltimes, to gain a better understanding of the seismological characteristics of the region. The 3-D local earthquake tomography inversions included 5444 P- and 3200 S-wave readings obtained from 168 well-located earthquakes between 2006 January and 2008 May. Dense ray coverage yields good resolution, particularly in the central part of the study area. The 3-D Vp and Vp/Vs tomographic images reveal clear correlations with both the surface geology and significant tectonic units in the region. We observed the lower limit of the seismogenic zone for north-central Anatolia at 15 km depth. Final earthquake locations display a distributed pattern throughout the study area, with most of the earthquakes occurring on the major splays of the NAFZ, rather than its master strand. We identify three major high-velocity blocks in the mid-crust separated by the Izmir-Ankara-Erzincan Suture and interpret these blocks to be continental basement fragments that were accreted onto the margin following the closure of Neo-Tethyan Ocean. These basement blocks may have in part influenced the rupture propagations of the historical 1939, 1942 and 1943 earthquakes. In addition, large variations in the Vp/Vs ratio in the mid-crust were observed and have been correlated with the varying fluid contents of the existing lithologies and related tectonic structures.", 
  "headline": "3-D crustal structure along the North Anatolian Fault Zone in north-central Anatolia revealed by local earthquake tomography", 
  "identifier": 88007, 
  "image": "https://aperta.ulakbim.gov.tr/static/img/logo/aperta_logo_with_icon.svg", 
  "license": "http://www.opendefinition.org/licenses/cc-by", 
  "name": "3-D crustal structure along the North Anatolian Fault Zone in north-central Anatolia revealed by local earthquake tomography", 
  "url": "https://aperta.ulakbim.gov.tr/record/88007"
}
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