Investigation on the Potential of OSL for Dating Qanat in the Dasht-e Bayaz Region of Northeastern Iran Using the SAR Protocol for Quartz
سال انتشار: 1390
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 200
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شناسه ملی سند علمی:
JR_JSEE-13-2_001
تاریخ نمایه سازی: 12 آبان 1400
چکیده مقاله:
In some parts of Iran, such as Dasht-e-Bayaz, the line of wells of the Qanat systems have been displaced by coseismic faulting. If we can date the age of these Qanat wells and measure the amount of offset, we will be able to estimate the slip-rate of the fault. The existing constraints on age of ancient Qanats in Iran are typically assigned from archaeological investigations of nearby habitation sites. We present for the first time the results of OSL dating from spoil deposits associated with the Dasht-e-Bayaz Qanat. We further explore the possibility of dating Qanat directly using the novel method of OSL. The minimum ages which are assigned to maintenance and construction of Dasht-e-Bayaz Qanat, using SAR protocol are ۱۵.۸±۱.۶ka and ۲۲.۱±۲.۷ka, respectively. Archeological investigations suggest that the Qanat ages are much younger than ages obtained by OSL. We present evidence that the SAR approach that we have chosen is operative but not relevant. The OSL method has provided ages that are consistent with stratigraphic layers in the well, but these layers were not fully bleached during construction. The single aliquot method to which dim samples we've applied in the recent research is not an efficacious way to achieve the age of Qanats and may need to test for more samples.
کلیدواژه ها:
نویسندگان
M. Fattahi
Oxford University Center for the Environment
A. Aqazadeh
Institute of Geophysics, University of Tehran
R.T. Walker
University of Oxford
M. Talebian
Geological Survey of Iran, Tehran
R.A. Sloan
University of Cambridge
M.M. Khatib
Birjand University