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| Titel |
The earthquake sedimentary record in the western part of the Sea of Marmara, Turkey |
| VerfasserIn |
L. Drab, A. Hubert Ferrari, S. Schmidt, P. Martinez |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 12, no. 4 ; Nr. 12, no. 4 (2012-04-27), S.1235-1254 |
| Datensatznummer |
250010716
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| Publikation (Nr.) |
 copernicus.org/nhess-12-1235-2012.pdf |
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| Zusammenfassung |
| 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 M = 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. |
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