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Book Chapter

Archaeoseismological studies at the Pambak-Sevan-Syunik fault system, Armenia

By
Arkadi Karakhanyan
Arkadi Karakhanyan
Institute of Geological Sciences, National Academy of Sciences of Armenia, 24A Marshal Baghramyan Avenue, 0019 Yerevan, Armenia
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R. Badalyan
R. Badalyan
Institute of Archeology and Ethnography, National Academy of Sciences of Armenia, 15 Charents Street, 0019 Yerevan, Armenia
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A. Harutyunian
A. Harutyunian
Institute of Archeology and Ethnography, National Academy of Sciences of Armenia, 15 Charents Street, 0019 Yerevan, Armenia
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A. Avagyan
A. Avagyan
Institute of Geological Sciences, National Academy of Sciences of Armenia, 24A Marshal Baghramyan Avenue, 0019 Yerevan, Armenia
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H. Philip
H. Philip
Montpellier-2 University, Laboratory of Geosciences, Place Eugène Bataillon, F-34095 Montpellier Cedex 05, France
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V. Davtyan
V. Davtyan
GEORISK Scientific Research CJS Company, 24A Marshal Baghramyan Avenue, 0019 Yerevan, Armenia
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G. Alaverdyan
G. Alaverdyan
Institute of Geological Sciences, National Academy of Sciences of Armenia, 24A Marshal Baghramyan Avenue, 0019 Yerevan, Armenia
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K. Makaryan
K. Makaryan
Institute of Geological Sciences, National Academy of Sciences of Armenia, 24A Marshal Baghramyan Avenue, 0019 Yerevan, Armenia
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M. Martirosyan
M. Martirosyan
Institute of Geological Sciences, National Academy of Sciences of Armenia, 24A Marshal Baghramyan Avenue, 0019 Yerevan, Armenia
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Published:
December 21, 2017
15 June 201626 October 2016

ABSTRACT

The seismically active Pambak-Sevan-Syunik fault system is the largest of its kind in Armenia. During 2004–2012, archaeoseismological and paleoseismological studies were carried out along the southeastern segment of the active Pambak- Sevan-Syunik fault system (PSSF-3). These studies were conducted at six sites located within a 43-km-long section of the fault segment. Earthquake signs were studied on the northernmost site, in an ancient settlement dated to the Middle Bronze Age (the twenty-fourth to sixteenth centuries BCE). Offsets of barrows and walls dated to the Late Bronze–Early Iron Age (the twelfth to ninth centuries BCE) by surface ruptures were studied in some other localities of PSSF-3. Surface breaks caused by strong earthquakes were recorded at all the studied sites; some were observed to have caused 5.2 m to 8 m offsets of ancient structures by right-lateral strike-slip faulting. Radiocarbon dating of the earthquake that generated these surface breaks indicated that it occurred between the first and the fourth centuries CE. There is, indeed, historical evidence for a strong earthquake in the studied region dated to 368 CE. Signs of even older earthquakes were identified in two places in the excavated old structures and in paleoseismological trenches, and these were related to the Middle Bronze Age. The new data and discussion enable reestimation of the seismic hazard and slip rates for the southeastern segment of the Pambak-Sevan-Syunik fault system.

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Contents

GSA Special Papers

Tectonic Evolution, Collision, and Seismicity of Southwest Asia: In Honor of Manuel Berberian’s Forty-Five Years of Research Contributions

Geological Society of America
Volume
525
ISBN electronic:
9780813795256
Publication date:
December 21, 2017

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