The earthquake sedimentary record in the western part of the Sea of Marmara, Turkey
The submarine part of the North Anatolian Fault (NAF) is a very significant hazard for the 12 million people living in Istanbul (Turkey). An accurate seismic risk assessment necessitates paleoseismological data, which can be retrieved in the Marmara Sea by using sedimentary cores. Here, a record of...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2012-04-01
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| Series: | Natural Hazards and Earth System Sciences |
| Online Access: | http://www.nat-hazards-earth-syst-sci.net/12/1235/2012/nhess-12-1235-2012.pdf |
| _version_ | 1818684494491680768 |
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| author | L. Drab A. Hubert Ferrari S. Schmidt P. Martinez |
| author_facet | L. Drab A. Hubert Ferrari S. Schmidt P. Martinez |
| author_sort | L. Drab |
| collection | DOAJ |
| description | The submarine part of the North Anatolian Fault (NAF) is a very significant hazard for the 12 million people living in Istanbul (Turkey). An accurate seismic risk assessment necessitates paleoseismological data, which can be retrieved in the Marmara Sea by using sedimentary cores. Here, a record of turbidites was obtained in five cores, spanning the Tekirdağ Basin, the Western High and the Central Basin linked by the Tekirdağ fault segment. The turbidites are synchronous at different sites across the two basins and through the structural high pointing to shaking by earthquakes as a triggering mechanism. In particular, the <i>M</i> = 7.4 1912 Mürefte earthquake left a distinctive sedimentary imprint in all the studied cores. Radiocarbon dating implies a turbidite recurrence interval of about 300 yr. The low number of seismo-turbidites documented in the Central Basin compared to the Tekirdağ Basin suggests quasi-synchronous ruptures of the Tekirdağ Segment and the adjacent Central Segment of the NAF or a partial seismic slip on the Central Segment. Both scenarios have implications regarding seismic hazard. Finally, though we obtained a paleoseismological record of the ruptures along the Tekirdağ Segment, further chronological constraints are needed to better date the events and to confirm the completeness of the obtained record. |
| first_indexed | 2024-12-17T10:51:32Z |
| format | Article |
| id | doaj.art-961f40440a8243e9832eb20ddd38cf5b |
| institution | Directory Open Access Journal |
| issn | 1561-8633 1684-9981 |
| language | English |
| last_indexed | 2024-12-17T10:51:32Z |
| publishDate | 2012-04-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Natural Hazards and Earth System Sciences |
| spelling | doaj.art-961f40440a8243e9832eb20ddd38cf5b2022-12-21T21:51:58ZengCopernicus PublicationsNatural Hazards and Earth System Sciences1561-86331684-99812012-04-011241235125410.5194/nhess-12-1235-2012The earthquake sedimentary record in the western part of the Sea of Marmara, TurkeyL. DrabA. Hubert FerrariS. SchmidtP. MartinezThe submarine part of the North Anatolian Fault (NAF) is a very significant hazard for the 12 million people living in Istanbul (Turkey). An accurate seismic risk assessment necessitates paleoseismological data, which can be retrieved in the Marmara Sea by using sedimentary cores. Here, a record of turbidites was obtained in five cores, spanning the Tekirdağ Basin, the Western High and the Central Basin linked by the Tekirdağ fault segment. The turbidites are synchronous at different sites across the two basins and through the structural high pointing to shaking by earthquakes as a triggering mechanism. In particular, the <i>M</i> = 7.4 1912 Mürefte earthquake left a distinctive sedimentary imprint in all the studied cores. Radiocarbon dating implies a turbidite recurrence interval of about 300 yr. The low number of seismo-turbidites documented in the Central Basin compared to the Tekirdağ Basin suggests quasi-synchronous ruptures of the Tekirdağ Segment and the adjacent Central Segment of the NAF or a partial seismic slip on the Central Segment. Both scenarios have implications regarding seismic hazard. Finally, though we obtained a paleoseismological record of the ruptures along the Tekirdağ Segment, further chronological constraints are needed to better date the events and to confirm the completeness of the obtained record.http://www.nat-hazards-earth-syst-sci.net/12/1235/2012/nhess-12-1235-2012.pdf |
| spellingShingle | L. Drab A. Hubert Ferrari S. Schmidt P. Martinez The earthquake sedimentary record in the western part of the Sea of Marmara, Turkey Natural Hazards and Earth System Sciences |
| title | The earthquake sedimentary record in the western part of the Sea of Marmara, Turkey |
| title_full | The earthquake sedimentary record in the western part of the Sea of Marmara, Turkey |
| title_fullStr | The earthquake sedimentary record in the western part of the Sea of Marmara, Turkey |
| title_full_unstemmed | The earthquake sedimentary record in the western part of the Sea of Marmara, Turkey |
| title_short | The earthquake sedimentary record in the western part of the Sea of Marmara, Turkey |
| title_sort | earthquake sedimentary record in the western part of the sea of marmara turkey |
| url | http://www.nat-hazards-earth-syst-sci.net/12/1235/2012/nhess-12-1235-2012.pdf |
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