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Sedimentary record of coseismic subsidence in Hersek coastal lagoon (Izmit Bay, Turkey) and the late Holocene activity of the North Anatolian Fault

Sebastien Bertrand UGent, Lisa Doner, Sena Akcer On, Ummuhan Sancar, Ulla Schudack, Sreffen Mischke, M Namik Cagatay and Suzanne AG Leroy (2011) GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS. 12.
abstract
The late Holocene activity of a restraining bend of the northern strand of the North Anatolian Fault in Izmit Bay was investigated by a sedimentological, geochemical, and paleoecological analysis of sediment cores from Hersek coastal lagoon, NW Turkey. The sediment cores show a succession of sedimentary sequences composed of three units separated by gradual transitions. The first unit is composed of a thin layer of shell debris-rich sediment in abrupt contact with the underlying organic-rich deposits. This unit is over-lain by a thick foraminifera-rich mud deposit, and the sequences are capped by an organic-rich mud unit. These sequences are interpreted as silting up, shallowing upward deposits, typical of a lagoon becoming isolated from the sea. We suggest that they represent the sedimentary signature of coseismic subsidence, which was caused by reverse slip at the Hersek bend, and tsunamis in Izmit Bay. Our radiocarbon-dated paleoseismological record indicates (1) the atypical collapse of the hanging wall during the 740 earthquake and (2) subsidence of the footwall during the 987, 1509, and 1719 earthquakes. This study contributes to the understanding of the dynamics of restraining bends, and it highlights the potential of coastal sediments for reconstructing past earthquakes and tsunamis in regions dominated by strike-slip deformations.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
coastal lagoon, tsunami, coseismic subsidence, North Anatolian Fault, MARMARA SEA REGION, CASCADIA SUBDUCTION ZONE, LARGE EARTHQUAKES, GREAT EARTHQUAKES, SLIP DISTRIBUTION, TSUNAMI DEPOSITS, VANCOUVER-ISLAND, NEW-ZEALAND, WEST-COAST, AUGUST 17
journal title
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
Geochem. Geophys. Geosyst.
volume
12
article number
Q06002
pages
17 pages
Web of Science type
Article
Web of Science id
000291540300001
JCR category
GEOCHEMISTRY & GEOPHYSICS
JCR impact factor
3.021 (2011)
JCR rank
12/76 (2011)
JCR quartile
1 (2011)
ISSN
1525-2027
DOI
10.1029/2011GC003511
language
English
UGent publication?
no
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
2096368
handle
http://hdl.handle.net/1854/LU-2096368
date created
2012-04-27 19:30:30
date last changed
2016-12-21 15:41:58
@article{2096368,
  abstract     = {The late Holocene activity of a restraining bend of the northern strand of the North Anatolian Fault in Izmit Bay was investigated by a sedimentological, geochemical, and paleoecological analysis of sediment cores from Hersek coastal lagoon, NW Turkey. The sediment cores show a succession of sedimentary sequences composed of three units separated by gradual transitions. The first unit is composed of a thin layer of shell debris-rich sediment in abrupt contact with the underlying organic-rich deposits. This unit is over-lain by a thick foraminifera-rich mud deposit, and the sequences are capped by an organic-rich mud unit. These sequences are interpreted as silting up, shallowing upward deposits, typical of a lagoon becoming isolated from the sea. We suggest that they represent the sedimentary signature of coseismic subsidence, which was caused by reverse slip at the Hersek bend, and tsunamis in Izmit Bay. Our radiocarbon-dated paleoseismological record indicates (1) the atypical collapse of the hanging wall during the 740 earthquake and (2) subsidence of the footwall during the 987, 1509, and 1719 earthquakes. This study contributes to the understanding of the dynamics of restraining bends, and it highlights the potential of coastal sediments for reconstructing past earthquakes and tsunamis in regions dominated by strike-slip deformations.},
  articleno    = {Q06002},
  author       = {Bertrand, Sebastien and Doner, Lisa and On, Sena Akcer and Sancar, Ummuhan and Schudack, Ulla and Mischke, Sreffen and Cagatay, M Namik and Leroy, Suzanne AG},
  issn         = {1525-2027},
  journal      = {GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS},
  keyword      = {coastal lagoon,tsunami,coseismic subsidence,North Anatolian Fault,MARMARA SEA REGION,CASCADIA SUBDUCTION ZONE,LARGE EARTHQUAKES,GREAT EARTHQUAKES,SLIP DISTRIBUTION,TSUNAMI DEPOSITS,VANCOUVER-ISLAND,NEW-ZEALAND,WEST-COAST,AUGUST 17},
  language     = {eng},
  pages        = {17},
  title        = {Sedimentary record of coseismic subsidence in Hersek coastal lagoon (Izmit Bay, Turkey) and the late Holocene activity of the North Anatolian Fault},
  url          = {http://dx.doi.org/10.1029/2011GC003511},
  volume       = {12},
  year         = {2011},
}

Chicago
Bertrand, Sebastien, Lisa Doner, Sena Akcer On, Ummuhan Sancar, Ulla Schudack, Sreffen Mischke, M Namik Cagatay, and Suzanne AG Leroy. 2011. “Sedimentary Record of Coseismic Subsidence in Hersek Coastal Lagoon (Izmit Bay, Turkey) and the Late Holocene Activity of the North Anatolian Fault.” Geochemistry Geophysics Geosystems 12.
APA
Bertrand, Sebastien, Doner, L., On, S. A., Sancar, U., Schudack, U., Mischke, S., Cagatay, M. N., et al. (2011). Sedimentary record of coseismic subsidence in Hersek coastal lagoon (Izmit Bay, Turkey) and the late Holocene activity of the North Anatolian Fault. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, 12.
Vancouver
1.
Bertrand S, Doner L, On SA, Sancar U, Schudack U, Mischke S, et al. Sedimentary record of coseismic subsidence in Hersek coastal lagoon (Izmit Bay, Turkey) and the late Holocene activity of the North Anatolian Fault. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS. 2011;12.
MLA
Bertrand, Sebastien, Lisa Doner, Sena Akcer On, et al. “Sedimentary Record of Coseismic Subsidence in Hersek Coastal Lagoon (Izmit Bay, Turkey) and the Late Holocene Activity of the North Anatolian Fault.” GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 12 (2011): n. pag. Print.