Physics
Scientific paper
Nov 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30xtur7z&link_type=abstract
Geophysical Research Letters, Volume 30, Issue 24, pp. TUR 7-1, CiteID 8044, DOI 10.1029/2003GL018192
Physics
31
Seismology: Body Wave Propagation, Seismology: Continental Crust (1242), Seismology: Lithosphere And Upper Mantle, Tectonophysics: Continental Contractional Orogenic Belts, Tectonophysics: Core Processes (1507)
Scientific paper
The crustal structure of the Anatolian plateau in Eastern Turkey is investigated using receiver functions obtained from the teleseismic recordings of a 29 broadband PASSCAL temporary network, i.e., the Eastern Turkey Seismic Experiment [ETSE]. The S-wave velocity structure was estimated from the stacked receiver functions by performing a 6-plane layered grid search scheme in order to model the first order features in the receiver functions with minimum trade-off. We found no significant crustal root beneath the western portion of the network, but there is some evidence of crustal thickening in the northern portion of the network. We found an average crustal thickness of 45 km and an average crustal shear velocity of 3.7 km/s for the entire eastern Anatolian plateau. Within the Anatolian plateau we found evidence of a prominent low velocity zone where the crust thickness is approximately 46 km. These results suggests that the 2 km high topography across the Anatolian plateau is dynamically supported because most of the plateau appears to be isostatically under-compensated. Also, there appears to be a region of thin crust at the easternmost edge of the Anatolian plateau that may be a relic from the accretion of island arcs to the Eurasian plate.
Barazangi Muawia
Gürbüz Cemil
Sandvol Eric
Seber Dogan
Türkelli Niyazi
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