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| Titel |
Estimation of successive coseismic vertical offsets using coeval sedimentary events – application to the southwestern limit of the Sea of Marmara's Central Basin (North Anatolian Fault) |
| VerfasserIn |
C. Beck, C. Campos, K. K. Eriş, N. Çagatay, B. Mercier de Lépinay, F. Jouanne |
| 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 Sciences ; 15, no. 2 ; Nr. 15, no. 2 (2015-02-04), S.247-259 |
| Datensatznummer |
250119315
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| Publikation (Nr.) |
 copernicus.org/nhess-15-247-2015.pdf |
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| Zusammenfassung |
| In the deep part of the Sea of Marmara (Turkey), the sedimentation
developing upon the North Anatolian Fault is strongly influenced by the
associated seismic activity, through gravity reworking (fluidized
landslides) and tsunamis. Specific layers (homogenites + turbidites, HmTu),
representing individual sedimentary events, have been characterized along
three giant piston cores retrieved from the Çinarcik and Central (or Orta)
basins. Pre-Holocene, nonmarine sediments, were analyzed, representing the
last 12–17 kyr BP (before present). For a 2 kyr long interval, 11 events could be
precisely correlated on both sides of the Central Basin's southwestern
scarp. For each of them, based on the specific depositional process, the
thickness difference between the two sites was considered as a direct
estimation of the vertical component of a coeval coseismic offset. The
homogenite (upper) component accounts for the major part of the thickness
difference (ranging from 36 to 144 cm). These offsets were considered as
likely representing dominantly vertical throws, along the transtensional
southwestern boundary of the inner, pull-apart Central Basin. In terms of
natural hazards, further investigations on this local behavior should rather
be directed to tsunami genesis. |
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