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Paleoseismic record obtained by coring a sag-pond along the North Anatolian Fault (Turkey)

(2012) ANNALS OF GEOPHYSICS. 55(5). p.929-953
Author
Organization
Abstract
Shallow lakes along minor structural bends or discontinuities of strike-slip faults are not usually paleoseismological target sites. In the present study, we show that a 2-m-deep, 700-m-long lake that is cross-cut by the North Anatolian Fault contains a reliable paleoseimological record that can be obtained through coring. The North Anatolian Fault is a major strike-slip fault in Turkey, and it last ruptured across the Asagitepecik Lake in 1939, with a slip of about 6 m. Seismic lines still show remains of the fault rupture in the form of minor scarps across the lake. Collected short cores show a set of sedimentary sequences. Each sequence is composed of similar organic-rich sedimentary units. The lower unit is dark and fibrous, and is similar to the present sedimentation at the top of the core. The upper unit is disturbed and has anomalous organic matter content, grain size and mineralogy. It is interpreted as an earthquake-induced sedimentary event. The 2.5-m-long AT2007LG core comprises four sequences, and four sedimentary events. Radiogenic Pb-210 and Cs-137 data obtained previously imply that the shallowest event 1 was triggered by the 1939 M = 7.9 Erzincan earthquake. Radiocarbon dating and correlation to a reference varved record suggest that events 2 and 4 were initiated by the 1668 and 1254 historical earthquakes. Event 3 does not correspond to a large historical earthquake on the North Anatolian Fault.
Keywords
EARTHQUAKES, SEA, LATE PLEISTOCENE, Paleoseismology, SEDIMENTARY FEATURES, Lake, North Anatolian Fault, SLIP, MARMARA, REGION, TURBIDITES

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Citation

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MLA
Hubert-Ferrari, Aurelia, Ulaş Avşar, Meriam El Ouahabi, et al. “Paleoseismic Record Obtained by Coring a Sag-pond Along the North Anatolian Fault (Turkey).” ANNALS OF GEOPHYSICS 55.5 (2012): 929–953. Print.
APA
Hubert-Ferrari, Aurelia, Avşar, U., El Ouahabi, M., Lepoint, G., Martinez, P., & Fagel, N. (2012). Paleoseismic record obtained by coring a sag-pond along the North Anatolian Fault (Turkey). ANNALS OF GEOPHYSICS, 55(5), 929–953.
Chicago author-date
Hubert-Ferrari, Aurelia, Ulaş Avşar, Meriam El Ouahabi, Gilles Lepoint, Philippe Martinez, and Nathalie Fagel. 2012. “Paleoseismic Record Obtained by Coring a Sag-pond Along the North Anatolian Fault (Turkey).” Annals of Geophysics 55 (5): 929–953.
Chicago author-date (all authors)
Hubert-Ferrari, Aurelia, Ulaş Avşar, Meriam El Ouahabi, Gilles Lepoint, Philippe Martinez, and Nathalie Fagel. 2012. “Paleoseismic Record Obtained by Coring a Sag-pond Along the North Anatolian Fault (Turkey).” Annals of Geophysics 55 (5): 929–953.
Vancouver
1.
Hubert-Ferrari A, Avşar U, El Ouahabi M, Lepoint G, Martinez P, Fagel N. Paleoseismic record obtained by coring a sag-pond along the North Anatolian Fault (Turkey). ANNALS OF GEOPHYSICS. 2012;55(5):929–53.
IEEE
[1]
A. Hubert-Ferrari, U. Avşar, M. El Ouahabi, G. Lepoint, P. Martinez, and N. Fagel, “Paleoseismic record obtained by coring a sag-pond along the North Anatolian Fault (Turkey),” ANNALS OF GEOPHYSICS, vol. 55, no. 5, pp. 929–953, 2012.
@article{3152543,
  abstract     = {Shallow lakes along minor structural bends or discontinuities of strike-slip faults are not usually paleoseismological target sites. In the present study, we show that a 2-m-deep, 700-m-long lake that is cross-cut by the North Anatolian Fault contains a reliable paleoseimological record that can be obtained through coring. The North Anatolian Fault is a major strike-slip fault in Turkey, and it last ruptured across the Asagitepecik Lake in 1939, with a slip of about 6 m. Seismic lines still show remains of the fault rupture in the form of minor scarps across the lake. Collected short cores show a set of sedimentary sequences. Each sequence is composed of similar organic-rich sedimentary units. The lower unit is dark and fibrous, and is similar to the present sedimentation at the top of the core. The upper unit is disturbed and has anomalous organic matter content, grain size and mineralogy. It is interpreted as an earthquake-induced sedimentary event. The 2.5-m-long AT2007LG core comprises four sequences, and four sedimentary events. Radiogenic Pb-210 and Cs-137 data obtained previously imply that the shallowest event 1 was triggered by the 1939 M = 7.9 Erzincan earthquake. Radiocarbon dating and correlation to a reference varved record suggest that events 2 and 4 were initiated by the 1668 and 1254 historical earthquakes. Event 3 does not correspond to a large historical earthquake on the North Anatolian Fault.},
  author       = {Hubert-Ferrari, Aurelia and Avşar, Ulaş and El Ouahabi, Meriam and Lepoint, Gilles and Martinez, Philippe and Fagel, Nathalie},
  issn         = {1593-5213},
  journal      = {ANNALS OF GEOPHYSICS},
  keywords     = {EARTHQUAKES,SEA,LATE PLEISTOCENE,Paleoseismology,SEDIMENTARY FEATURES,Lake,North Anatolian Fault,SLIP,MARMARA,REGION,TURBIDITES},
  language     = {eng},
  number       = {5},
  pages        = {929--953},
  title        = {Paleoseismic record obtained by coring a sag-pond along the North Anatolian Fault (Turkey)},
  url          = {http://dx.doi.org/10.4401/ag-5460},
  volume       = {55},
  year         = {2012},
}

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