Determination of Slip-Rate by Optical Dating of Lake Bed Sediments from the Dasht-E-Bayaz Fault, Ne Iran

• Autorzy: Fattahi M. , Walker R. , Khatib M. M. , Zarrinkoub M. , Talebian M.

Identyfikatory

DOI

10.1515/geochr-2015-0013

• Języki publikacji: EN

Abstrakty

EN

The Dasht-e-Bayaz left-lateral strike-slip fault in northeastern Iran ruptured in two destructive earthquakes in 1968 and 1979. The western half of the Dasht-e-Bayaz fault cuts across the dry lake-bed in the Nimbluk valley and has no measurable relief except for at a few localised jogs in the fault trace. We provide the first quantitative constraint on the slip-rate of the Dasht-e-Bayaz fault averaged over the Holocene. The western part of the fault cuts across the Nimbluk valley; the flat surface of which is composed of lake-bed sediments. Small streams cut into the surface of the lake-beds are displaced across the fault by 26 ± 2 m. Two OSL samples of the lake-bed sediments are successfully dated at 8.6 ± 0.6 and 8.5 ± 1.0 ka, from which we calculate a minimum slip-rate of 2.6 mm/yr. This minimum slip rate remains constant with the previously proposed Holocene slip rate of 2.5 mm/yr and within the range of the Holocene slip rate of 2.4 ± 0.3 mm/yr estimated before on the central section of the Doruneh fault.

Słowa kluczowe

EN

slip rate; OSL; Dasht-e-Bayaz fault; NE Iran

• Wydawca: De Gruyter
• Czasopismo: Geochronometria
• Rocznik: 2015
• Tom: Vol. 42, no.1
• Strony: 148--157
• Opis fizyczny: Bibliogr. 28 poz., rys.

Twórcy

autor

Fattahi M.

• Institute of Geophysics, Tehran University, Kargar Shomali, Tehran, Iran
• The School of Geography, University of Oxford, south park road, Oxford OX1 3QY, UK

autor

Walker R.

• Department of Earth Sciences, University of Oxford, Parks Road, Oxford OX1 3AN, UK

autor

Khatib M. M.

• Department of geology, Birjand University, P.o.Box 131, Birjand, Iran

autor

Zarrinkoub M.

• 4Department of geology, Birjand University, P.o.Box 131, Birjand, Iran

autor

Talebian M.

• Geological Survey of Iran, Azadi Square, Meraj Avenue, P.O. Box 11365-4563, Tehran, Iran

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