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Title:
The SIMBAAD Experiment in W-Turkey and Greece: A Dense Seismic Network to Study the Crustal and Mantle Structures
Authors:
Paul, A.; Hatzfeld, D.; Karabulut, H.; Hatzidimitriou, P.; Childs, D. M.; Nikolova, S.; Péquegnat, C.; Hubans, F.; Schmid, A.; Aktar, M.; Mutlu, A. K.; Afacan, T.; Ozakin, Y.; Samut, D.; Papazachos, C.; Karagianni, I.; Kementzetzidou, D.; Karagianni, E.; Roumelioti, Z.; Vamvakaris, D.; Scordilis, M.; Lyon-Caen, H.
Affiliation:
AA(Laboratoire de Géophysique Interne et Tectonophysique, Université Joseph- Fourier & CNRS, BP 53, Grenoble, 38041, France ; ), AB(Laboratoire de Géophysique Interne et Tectonophysique, Université Joseph- Fourier & CNRS, BP 53, Grenoble, 38041, France ; ), AC(Kandilli Observatory and Earthquake Research Institute, Bogaziçi University, Istanbul Kandilli Observatory, Cengelköy, Istanbul, 81220, Turkey ; ), AD(Geophysical Laboratory, Aristotle University of Thessaloniki, PO Box 352-1, Thessaloniki, GR-54124, Greece ; ), AE(Kandilli Observatory and Earthquake Research Institute, Bogaziçi University, Istanbul Kandilli Observatory, Cengelköy, Istanbul, 81220, Turkey ; ), AF(Geophysical Institute, Bulgarian Academy of Science, Acad G. Bonchev Str. Block 3, Sofia, 1113, Bulgaria ; ), AG(Laboratoire de Géophysique Interne et Tectonophysique, Université Joseph- Fourier & CNRS, BP 53, Grenoble, 38041, France ; ), AH(Laboratoire de Géophysique Interne et Tectonophysique, Université Joseph- Fourier & CNRS, BP 53, Grenoble, 38041, France ; ), AI(Laboratoire de Géophysique Interne et Tectonophysique, Université Joseph- Fourier & CNRS, BP 53, Grenoble, 38041, France ; ), AJ(Kandilli Observatory and Earthquake Research Institute, Bogaziçi University, Istanbul Kandilli Observatory, Cengelköy, Istanbul, 81220, Turkey ; ), AK(Kandilli Observatory and Earthquake Research Institute, Bogaziçi University, Istanbul Kandilli Observatory, Cengelköy, Istanbul, 81220, Turkey ; ), AL(Kandilli Observatory and Earthquake Research Institute, Bogaziçi University, Istanbul Kandilli Observatory, Cengelköy, Istanbul, 81220, Turkey ; ), AM(Kandilli Observatory and Earthquake Research Institute, Bogaziçi University, Istanbul Kandilli Observatory, Cengelköy, Istanbul, 81220, Turkey ; ), AN(Kandilli Observatory and Earthquake Research Institute, Bogaziçi University, Istanbul Kandilli Observatory, Cengelköy, Istanbul, 81220, Turkey ; ), AO(Geophysical Laboratory, Aristotle University of Thessaloniki, PO Box 352-1, Thessaloniki, GR-54124, Greece ; ), AP(Geophysical Laboratory, Aristotle University of Thessaloniki, PO Box 352-1, Thessaloniki, GR-54124, Greece ; ), AQ(Geophysical Laboratory, Aristotle University of Thessaloniki, PO Box 352-1, Thessaloniki, GR-54124, Greece ; ), AR(Geophysical Laboratory, Aristotle University of Thessaloniki, PO Box 352-1, Thessaloniki, GR-54124, Greece ; ), AS(Geophysical Laboratory, Aristotle University of Thessaloniki, PO Box 352-1, Thessaloniki, GR-54124, Greece ; ), AT(Geophysical Laboratory, Aristotle University of Thessaloniki, PO Box 352-1, Thessaloniki, GR-54124, Greece ; ), AU(Geophysical Laboratory, Aristotle University of Thessaloniki, PO Box 352-1, Thessaloniki, GR-54124, Greece ; ), AV(Laboratoire de Géologie, Ecole Normale Supérieure, 24 rue Lhomond, Paris, 75231, France ; )
Publication:
American Geophysical Union, Fall Meeting 2008, abstract #T21A-1926
Publication Date:
12/2008
Origin:
AGU
AGU Keywords:
7208 Mantle (1212, 1213, 8124), 7218 Lithosphere (1236), 7294 Seismic instruments and networks (0935, 3025), 8120 Dynamics of lithosphere and mantle: general (1213), 8180 Tomography (6982, 7270)
Abstract Copyright:
(c) 2008: American Geophysical Union
Bibliographic Code:
2008AGUFM.T21A1926P

Abstract

SIMBAAD (Seismic Imaging of the Mantle in the Aegean-Anatolian Domain) is a temporary seismic experiment which aims at investigating the crustal and mantle structure beneath Western Turkey, the Aegean Sea, and continental Greece. This tectonically very active region has experienced a variety of geodynamic processes and its geology and kinematics have been extensively studied. It is thus a good place to test competing hypotheses on how the surface kinematics is related to mantle structure and dynamics. In the spring of 2007, we have installed a temporary network of 33 broadband stations in Turkey, Greece, and S-Bulgaria for 2- year duration. It complements the permanent broadband networks (~90 stations) to give a regular grid with an inter-station spacing of ~100 km in the area [20-34°E; 35-41°N]. The common database of broadband continuous records that we are building from permanent and temporary networks will be the first one with such a dense spacing in this area. The temporary SIMBAAD experiment also includes 2 north-south profiles of more densely-spaced stations (~15 km) crossing Western Anatolia at 18°E and 31.5°E. A preliminary receiver-function analysis of the western transect documents a rather flat Moho at ~30 km depth with negligible variations of the crustal thickness under the major grabens and core complexes (e.g. Menderes). We interpret this result as an indication for a hot and ductile lower crust which vertically decouples upper crust deformation from mantle deformation.
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