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Paleoseismic Evidence of Characteristic Slip on the Western Segment of the North Anatolian Fault, Turkey

Klinger, Y. and Sieh, K. and Altunel, E. and Akoglu, A. and Barka, A. and Dawson, T. and Gonzalez, T. and Meltzner, A. J. and Rockwell, T. (2003) Paleoseismic Evidence of Characteristic Slip on the Western Segment of the North Anatolian Fault, Turkey. Bulletin of the Seismological Society of America, 93 (6). pp. 2317-2332. ISSN 0037-1106. https://resolver.caltech.edu/CaltechAUTHORS:20140801-105426326

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Abstract

We have conducted a paleoseismic investigation of serial fault rupture at one site along the 110-km rupture of the North Anatolian fault that produced the Mw 7.4 earthquake of 17 August 1999. The benefit of using a recent rupture to compare serial ruptures lies in the fact that the location, magnitude, and slip vector of the most recent event are all very well documented. We wished to determine whether or not the previous few ruptures of the fault were similar to the recent one. We chose a site at a step-over between two major strike-slip traces, where the principal fault is a normal fault. Our two excavations across the 1999 rupture reveal fluvial sands and gravels with two colluvial wedges related to previous earthquakes. Each wedge is about 0.8 m thick. Considering the processes of collapse and subsequent diffusion that are responsible for the formation of a colluvial wedge, we suggest that the two paleoscarps were similar in height to the 1999 scarp. This similarity supports the concept of characteristic slip, at least for this location along the fault. Accelerator mass spectrometry (AMS) radiocarbon dates of 16 charcoal samples are consistent with the interpretation that these two paleoscarps formed during large historical events in 1509 and 1719. If this is correct, the most recent three ruptures at the site have occurred at 210- and 280-year intervals.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1785/0120010270DOIArticle
http://bssa.geoscienceworld.org/content/93/6/2317PublisherArticle
ORCID:
AuthorORCID
Sieh, K.0000-0002-7311-2447
Meltzner, A. J.0000-0002-2955-0896
Additional Information:© 2003 Seismological Society of America. Manuscript received 23 October 2001. The authors wish to thank the Ford Otosan for its support during this work. Some of the maps have been prepared using the Generic Mapping Tool free software. We thank R. Langridge and D. Ragona for their help during the field work. J. Liu, R. Armijo, and B. Meyer helped to improve this manuscript by their comments. We thank M. Meghraoui and an anonymous reviewer for very helpful reviews that significantly improved our analysis of the data. In memoriam of A. Barka, who died tragically while the article was in review. This is Caltech Contribution Number 8989 and IPGP Contribution Number 1936.
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Sciences8989
IPGP1936
Issue or Number:6
Record Number:CaltechAUTHORS:20140801-105426326
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140801-105426326
Official Citation:Klinger, Y., Sieh, K., Altunel, E., Akoglu, A., Barka, A., Dawson, T., . . . Rockwell, T. (2003). Paleoseismic Evidence of Characteristic Slip on the Western Segment of the North Anatolian Fault, Turkey. Bulletin of the Seismological Society of America, 93(6), 2317-2332. doi: 10.1785/0120010270
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:47789
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:04 Aug 2014 18:22
Last Modified:09 Mar 2020 13:19

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