Crustal and uppermost mantle structure of Caucasus and surrounding regions
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 veloci...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Seismological Society of China
2016
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| Online Access: | http://hdl.handle.net/1721.1/105911 https://orcid.org/0000-0002-4851-3089 https://orcid.org/0000-0002-9018-1540 |
| _version_ | 1826198610953371648 |
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| author | Krasovec, Mary Martin, Randolph J. Sun, Youshun Toksoz, M. Nafi Yu, Diming Liu, Qingyun Liu, Jun |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Krasovec, Mary Martin, Randolph J. Sun, Youshun Toksoz, M. Nafi Yu, Diming Liu, Qingyun Liu, Jun |
| author_sort | Krasovec, Mary |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T11:07:29Z |
| format | Article |
| id | mit-1721.1/105911 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T11:07:29Z |
| publishDate | 2016 |
| publisher | Seismological Society of China |
| record_format | dspace |
| spelling | mit-1721.1/1059112022-10-01T01:25:07Z Crustal and uppermost mantle structure of Caucasus and surrounding regions Krasovec, Mary Martin, Randolph J. Sun, Youshun Toksoz, M. Nafi Yu, Diming Liu, Qingyun Liu, Jun Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Sun, Youshun Toksoz, M. Nafi Yu, Diming Liu, Qingyun Liu, Jun 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. United States. Defense Threat Reduction Agency (Contracts DE-AC-52-04NA25612, NNSA-03-2S2 and W-7405-ENG-483) Chinese Academy of Sciences (Fund KJCX2-EW-121) 2016-12-21T15:11:25Z 2016-12-21T15:11:25Z 2012-12 2012-09 2016-08-18T15:47:33Z Article http://purl.org/eprint/type/JournalArticle 1674-4519 1867-8777 http://hdl.handle.net/1721.1/105911 Sun, Youshun et al. “Crustal and Uppermost Mantle Structure of Caucasus and Surrounding Regions.” Earthquake Science 25.5–6 (2012): 505–515. https://orcid.org/0000-0002-4851-3089 https://orcid.org/0000-0002-9018-1540 en http://dx.doi.org/10.1007/s11589-012-0874-y Earthquake Science 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. The Seismological Society of China, Institute of Geophysics, ChinaEarthquake Administration, and Springer-VerlagBerlin Heidelberg application/pdf Seismological Society of China Seismological Society of China |
| spellingShingle | Krasovec, Mary Martin, Randolph J. Sun, Youshun Toksoz, M. Nafi Yu, Diming Liu, Qingyun Liu, Jun Crustal and uppermost mantle structure of Caucasus and surrounding regions |
| title | Crustal and uppermost mantle structure of Caucasus and surrounding regions |
| title_full | Crustal and uppermost mantle structure of Caucasus and surrounding regions |
| title_fullStr | Crustal and uppermost mantle structure of Caucasus and surrounding regions |
| title_full_unstemmed | Crustal and uppermost mantle structure of Caucasus and surrounding regions |
| title_short | Crustal and uppermost mantle structure of Caucasus and surrounding regions |
| title_sort | crustal and uppermost mantle structure of caucasus and surrounding regions |
| url | http://hdl.handle.net/1721.1/105911 https://orcid.org/0000-0002-4851-3089 https://orcid.org/0000-0002-9018-1540 |
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