Isotropic and Anisotropic P Wave Velocity Structures of the Crust and Uppermost Mantle Beneath Turkey

Haibo Wang*, Zhouchuan Huang*, Tuna Eken, Derya Keleş, Tulay Kaya-Eken, Judith M. Confal, Ceyhun Erman, Seda Yolsal-Çevikbilen, Dapeng Zhao, Tuncay Taymaz

*Bu çalışma için yazışmadan sorumlu yazar

Araştırma sonucu: ???type-name???Makalebilirkişi

19 Atıf (Scopus)

Özet

Compressional and extensional tectonics following northward plate convergences since the Miocene have formed the major surface features in Turkey, such as faulting and orogeny. Despite increasing efforts in last few decades aiming to elucidate the current architecture of the crust and mantle beneath Turkey, several issues regarding the depth extent of the deformation zones, crust-mantle interaction (e.g., coupling and decoupling) in relation to the deformation, and stress transmission in the lithosphere remain elusive. Here we present high-resolution 3-D P wave isotropic and azimuthal anisotropic velocity models of the crust and uppermost mantle beneath Turkey by inverting 204,531 P wave arrival times of 8,103 local crustal earthquakes. Our results reveal low-velocity anomalies or velocity contrasts down to the uppermost mantle along the North and East Anatolian Fault Zones. The fast velocity directions (FVDs) of azimuthal anisotropy in the lower crust and uppermost mantle are parallel to the regional maximum extensional directions in western Turkey, and the FVDs in the crust and uppermost mantle are parallel to the surface structures in southeastern Turkey. These results indicate that vertically coherent deformation between the crust and uppermost mantle occurs in western and southeastern Turkey. However, in central northern Turkey, the FVDs in the uppermost mantle are oblique to both the FVDs in the lower crust and the maximum shear directions derived from GPS measurements, suggesting that the crust and lithospheric mantle are decoupled there.

Orijinal dilİngilizce
Makale numarasıe2020JB019566
DergiJournal of Geophysical Research: Solid Earth
Hacim125
Basın numarası12
DOI'lar
Yayın durumuYayınlandı - Ara 2020

Bibliyografik not

Publisher Copyright:
© 2020. The Authors.

Finansman

This work was supported by the National Natural Science Foundation of China (41674044), the Scientific and Technological Research Council of Turkey (TÜBİTAK–ÇAYDAG‐115Y248), and Japan Society for the Promotion of Science (19H01996). T. E. and T. T. thank the Alexander von Humboldt Foundation (AvH) toward computational and peripherals resources for providing financial support. We thank Prof. Michael Bostock (the Editor), an Associate Editor, and three anonymous reviewers for their very helpful and constructive review comments and suggestions that have improved this paper.

FinansörlerFinansör numarası
TÜBİTAK
Alexander von Humboldt-Stiftung
Japan Society for the Promotion of Science19H01996
National Natural Science Foundation of China41674044
Türkiye Bilimsel ve Teknolojik Araştirma KurumuÇAYDAG‐115Y248

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