The 1999 eartquake activity in Izmit, NW Turkey. An opportunity for the study of actualistic strike-slip related tectonic forms

PDF
Published: Jan 1, 2001
DOI: https://doi.org/10.12681/bgsg.17258
Keywords:
Izmit earthquake strike slip fault
E. L. LEKKAS
Department of Geology, University of Athens
Abstract

The 1999 earthquake activity in the area of Izmit - Bolu, Turkey, which included two major shocks, on the 17th Aug. and 12th Nov. 1999, was caused by the reactivation of fault segments that belong to NAFZ. Field research was focused on fault geometry and slip characteristics, and allowed us to distinguish seven successive right-stepping reactivated segments and the related oversteps. Investigations showed that there is good match between the observed structures and those produced by experimental modelling. Finally, an estimation is made as to the percentage of seismic and aseismic slip on the reactivated segment of the fault zone

Article Details
  • Section
  • Seismology
Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Authors who publish with this journal agree to the following terms:

Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution Non-Commercial License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.

Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g. post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. Authors are permitted and encouraged to post their work online (preferably in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.

Downloads
Download data is not yet available.
References
AKSU Α., CALON T. & HISCOTT R. 2000. Anatomy of the North Anatolian Fault Zone in the Marmara Sea, Western Turkey: extensional basins above a continental transform. GSA Today, Pubi. Geol. Soc. America, 10, 6, 3-7.
AMBRASEYS, N. 1970. Some characteristic features of the North Anatolian Fault Zone. Tectonophysics, 9, 143-165.
AMBRASEYS N. & ZATOPEC A. 1969. The Muduryu Valley, Western Anatolia, Turkey earthquake of 22 July 1967. Bull. Seismological Society of America, 59, 521-589.
ARMIJO R., MEYER B., HUBERT A. & BARKA A. 1999. Westward propagation of the North Anatolian fault into the northern Aegean Sea: Timing and kinematics. Geology, 27, 3, 267-270.
AWATA Y, YOSHIOKA T, EMRE O., DUMAN T.Y, DOGAN A. & TSUKUDA E. 2000. Segment structures of the surface ruptures associated with the August 17, 1999 Izmit earthquake, Turkey. XXVII General Assembly of the European Seismological Commission (ESC), 149-153, Lisbon.
AYDIN A. & NUR A. 1982. Evolution of pull-apart basins and their scale independence. Tectonics, 1, 91-105.
BARKA, A. 1992. The North Anatolian Fault Zone. Annales Tectonicae, 6, 164-195.
Barka, Α.: 1996, Slip distribution along the North Anatolian fault associated with the large earthquakes of the period 1939-1967. Bull. Seism. Soc. Am., 86, 1238-1254.
BARKA A.A., Hancock PL. & Robertson A.M.F 1984. Neotectonic deformation patterns in the convex-northwards arc of the North Anatolian Fault zone. In: Dixon, J.F (Ed.) The Geological Evolution of the Eastern Mediterranean. Geological Society of London, Special Publication, 17, 763-774.
BARKA A.A. & KADINSKY-CADE K. 1988. Strike-slip fault geometry in Turkey and its influence on earthquake activity. Tectonics, 7, 663-684.
CHOROWICZ J., DHONT D. & GUNDOGDU N. 1999. Neotectonics in the eastern North Anatolian fault region (Turkey) advocates crustal extension: mapping from SAR ERS imagery and Digital Elevation Model. Journal of Structural Geology, 21, 511-532.
EMRE O., DUMAN Y, AWATA Y, DOGAN A. & OZALP S. (2000). XXVII General Assembly of the European Seismological Commission (ESC), 247-251, Lisbon.
LEKKAS Â., DANDOULAKI Ì., IOANNIDES Ê., LALECHOS S. & KIRIAZIS A. 1999. Izmit earthquake, Turkey 1999. Seismotectonic settings - Earthquake and Ground motion characteristics - Geodynamic phenomena - Damage typology and distribution. 13th Hellenic Concrete Conference, Special Issue, Rethimno.
MANN P., HAMPTON M.R., BRADLEY D.C & BURKE K. 1983. Development of pull-apart basins. Journal of Geology, 91,529-554.
ORAL, M.B. 1994. Global Positioning System (GPS) Measurements in Turkey (1988-1992): Kinematics of the Africa-Arabia-Eurasia Plate Collision Zone. Ph. D. Thesis, 344pp., Mass. Inst. Tech.
REILINGER R.E., McCLUSKY S.C., ORAL M.B., KING R.W., TOKSOZ M.N., BARKA A.A., KINIKI., LENK Ο. & SANLI I. 1997. Global Positioning System measurements of present-day crustal movements in the Arabia-Africa-Eurasia plate collision zone. Journal of Geophysical Research, 102, 9983-9999.
SENGOR, A. 1979. The North Anatolian transform fault: its age, offset and tectonic significance. Journal of the Geological Society of London, 136, 269-282.
SENGOR A.M.C., GORUR N. & SAROGLU F 1985. Strike-slip faulting and related basin formation in zones of tectonic escape: Turkey as a case study. In: Biddle, K.T. & Christie-Blick, N., eds., Strike-slip deformation, basin formation and sedimentation, Spec. Pubi. Soc. Econ, Paleont. Miner., Tulsa, 37, 227-264.
STEIN R., BARKA A. & DIETERICH H. 1997. Progressive failure on the North Anatolian fault since 1939 by earthquake stress triggering. Geophysical Journal International, 128, 594-604.
STRAUB C, KAHLE H.G. & SCHINDLER C. 1997. GPS and geological estimates of the tectonic activity in the Marmara Sea region, NW Anatolia. Journal of Geophysical Research, 102, 27587-27601.
SYLVESTER, A.G. 1988. Strike-slip faults. Bull. Geol. Soc. Am., 100, 1666-1703.
WONG H.K., LUDMANN T., ULUG A. & GORUR N. 1995. The Sea of Marmara: A plate boundary sea in an escape tectonic regime. Tectonophysics, 244, 231-250.
YOUD T, ASCHHEIM M., BASOZ Ν., GULKAN,R, IMBSEN R.A., JOHNSON G.S., LOVE J., MANDER J.B., MITCHELL W., SEZEN H., SOZEN M., SWAN F. & YANEV, P. 1999. The Izmit (Kocaeli), Turkey Earthquake of August 17, 1999. EERI Special Earthquake Report, October 1999, 1-12.
Most read articles by the same author(s)