Crustal and uppermost mantle structure of Caucasus and surrounding regions
Name
11589_2012_Article_874.pdf
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6.28 MB
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Checksum (MD5)
e23b986ebedfc2b4ffeda0c67ff75b6d
Author(s)
Krasovec, Mary
Martin, Randolph J.
Sun, Youshun
Toksoz, M. Nafi
Yu, Diming
Liu, Qingyun
Liu, Jun
Date Issued
December 2012
Journal
Earthquake Science
Publisher
Seismological Society of China
Citation
Sun, Youshun et al. “Crustal and Uppermost Mantle Structure of Caucasus and Surrounding Regions.” Earthquake Science 25.5–6 (2012): 505–515.
Version
Author's final manuscript
Abstract
A 3-D P-wave velocity model is developed for the crust and uppermost mantle of Caucasus and the surrounding area by applying the tomographic method of Zhao et al. using 300 000 high-quality P-wave first arrivals from 43 000 events between 1964 and 2005. This tomographic method can accommodate velocity discontinuities such as the Moho in addition to smooth velocity variations. The spatial resolution is 1°×1° in the horizontal direction and 10 km in depth. The velocity images of the upper crust correspond well with the surface geology. Beneath the southern Caucasus high velocity anomalies are found in the middle crust and low velocity anomalies are found in the uppermost mantle. Relatively low Pn velocities are located under the Lesser Caucasus, eastern Turkey, and northern Iran. Higher Pn velocities occur under the eastern portion of the Black Sea and the southern Caspian Sea, and also extend into the eastern edge of Azerbaijan. Tomographic model significantly reduces the travel-time residuals.
MIT Department
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/s11589-012-0874-y
