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Volume 6, issue 3 | Copyright

Special issue: The Lithosphere-Asthenosphere Boundary (LAB) Dilemma

Solid Earth, 6, 971-984, 2015
https://doi.org/10.5194/se-6-971-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 31 Jul 2015

Research article | 31 Jul 2015

Thickness of the lithosphere beneath Turkey and surroundings from S-receiver functions

R. Kind2,1, T. Eken3, F. Tilmann2,1, F. Sodoudi1, T. Taymaz3, F. Bulut4, X. Yuan1, B. Can5, and F. Schneider1 R. Kind et al.
  • 1Deutsches GeoForschungsZentrum GFZ, Potsdam, Germany
  • 2Freie Universität, Fachrichtung Geophysik, Berlin, Germany
  • 3Department of Geophysical Engineering, The Faculty of Mines, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey
  • 4Istanbul Ayd\i n University, AFAM D. A. E. Research Centre, Istanbul, Turkey
  • 5Bogaziçi University, Kandilli Observatory and Earthquake Research Institute (KOERI), Istanbul, Turkey

Abstract. We analyze S-receiver functions to investigate variations of lithospheric thickness below the entire region of Turkey and surrounding areas. The teleseismic data used here have been compiled combining all permanent seismic stations which are open to public access. We obtained almost 12 000 S-receiver function traces characterizing the seismic discontinuities between the Moho and the discontinuity at 410 km depth. Common-conversion-point stacks yield well-constrained images of the Moho and of the lithosphere–asthenosphere boundary (LAB). Results from previous studies suggesting shallow LAB depths between 80 and 100 km are confirmed in the entire region outside the subduction zones. We did not observe changes in LAB depths across the North and East Anatolian faults. To the east of Cyprus, we see indications of the Arabian LAB. The African plate is observed down to about 150 km depth subducting to the north and east between the Aegean and Cyprus with a tear at Cyprus. We also observed the discontinuity at 410 km depth and a negative discontinuity above the 410, which might indicate a zone of partial melt above this discontinuity.

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We observed with seismic data in the entire region of Turkey and surroundings the lithosphere–asthenosphere boundary (LAB). It is located generally between 80 and 100km depth outside the subduction zone. No change of the LAB depth was observed across the North and East Anatolian faults. The LAB of the subducting African plate is observed down to about 150km depth from the Aegean to the east of Cyprus, with a tear at Cyprus.
We observed with seismic data in the entire region of Turkey and surroundings the...
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