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Arshan palaeoseismic feature of the Tunka fault (Baikal rift zone, Russia)

Arshan palaeoseismic feature of the Tunka fault (Baikal rift zone, Russia)
Arshan palaeoseismic feature of the Tunka fault (Baikal rift zone, Russia)
The traditional concept of the rift development of flank depressions in the Baikal rift zone is now doubted in view of some indicators for compression deformations identified by the seismogeological and geodetic methods. Besides, the paleoseismological investigations revealed seismogenic strike-slips and reverse faults in the Tunka fault zone that is a major structure-controlling element of the Tunka rift depression. However, a detailed study of the upslope-facing scarp in the Arshan paleoseismogenic structure zone has shown that its formation might be due to rift mechanism of basin formation. Age estimation has been made for the previously unknown pre-historic earthquake whose epicentral area coincides with the western flank of the Arshan paleoseismogenic structure. Judging from previously determined ages of paleoearthquakes, the mean recurrence period for faulting events on the central Tunka fault is 2780–3440 years.
palaeoseismic features, baikal rift zone, siberia
0743-9547
317-328
Smekalin, Oleg P.
a8ca08d8-bd76-4403-b7b2-1b7bc6cf0b84
Shchetnikov, Alexander A.
79f94416-6aad-4409-813f-64175b5f1891
White, Dustin
5c77fb12-78b8-4a94-b25a-8697ccf5480b
Smekalin, Oleg P.
a8ca08d8-bd76-4403-b7b2-1b7bc6cf0b84
Shchetnikov, Alexander A.
79f94416-6aad-4409-813f-64175b5f1891
White, Dustin
5c77fb12-78b8-4a94-b25a-8697ccf5480b

Smekalin, Oleg P., Shchetnikov, Alexander A. and White, Dustin (2013) Arshan palaeoseismic feature of the Tunka fault (Baikal rift zone, Russia). [in special issue: Geology of Baikal Region] Journal of Asian Earth Sciences, 62, 317-328. (doi:10.1016/j.jseaes.2012.10.011).

Record type: Article

Abstract

The traditional concept of the rift development of flank depressions in the Baikal rift zone is now doubted in view of some indicators for compression deformations identified by the seismogeological and geodetic methods. Besides, the paleoseismological investigations revealed seismogenic strike-slips and reverse faults in the Tunka fault zone that is a major structure-controlling element of the Tunka rift depression. However, a detailed study of the upslope-facing scarp in the Arshan paleoseismogenic structure zone has shown that its formation might be due to rift mechanism of basin formation. Age estimation has been made for the previously unknown pre-historic earthquake whose epicentral area coincides with the western flank of the Arshan paleoseismogenic structure. Judging from previously determined ages of paleoearthquakes, the mean recurrence period for faulting events on the central Tunka fault is 2780–3440 years.

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More information

e-pub ahead of print date: 22 October 2012
Published date: 30 January 2013
Keywords: palaeoseismic features, baikal rift zone, siberia
Organisations: Archaeology

Identifiers

Local EPrints ID: 345468
URI: http://eprints.soton.ac.uk/id/eprint/345468
ISSN: 0743-9547
PURE UUID: cf6cdc2d-9e23-4a00-b8bb-9a81de88289a

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Date deposited: 22 Nov 2012 11:43
Last modified: 16 Jul 2019 21:49

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Contributors

Author: Oleg P. Smekalin
Author: Alexander A. Shchetnikov
Author: Dustin White

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