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Optical dating of sediments in Wadi Sabra (SW Jordan)

Title data

Klasen, Nicole ; Hilgers, Alexandra ; Schmidt, Christoph ; Bertrams, Manuel ; Schyle, Daniel ; Lehmkuhl, Frank ; Richter, Jürgen ; Radtke, Ulrich:
Optical dating of sediments in Wadi Sabra (SW Jordan).
In: Quaternary Geochronology. Vol. 18 (December 2013) . - pp. 9-16.
ISSN 1871-1014
DOI: https://doi.org/10.1016/j.quageo.2013.08.002

Official URL: Volltext

Project information

Project title:
Project's official titleProject's id
SFB 806 'Our Way To Europe'SFB806

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

At Wadi Sabra (SW Jordan) human occupation dates back to the Palaeolithic and Epipalaeolithic. Although there is stratigraphic correlation based on archaeological finds of Ahmarian origin, numerical age estimates are lacking. We applied single-aliquot optical dating of coarse grained quartz of wadi deposits and investigated the luminescence properties in detail to achieve more accurate age information about the time of human occupation. Weak luminescence signals and scattered dose distributions characterise the multi-grain aliquots. The residual doses of the investigated modern wadi sediment are between 0 and 7 Gy. Moreover, comparison of equivalent dose (De) values of 1 mm and 8 mm aliquots shows higher equivalent doses for the large aliquots. Both experiments indicate that the luminescence signal is partially bleached prior to deposition. The dose distributions of all samples are broadly scattered and have overdispersion values between 25 and 43%, some samples are significantly skewed. The shape of the dose distributions points to other sources of scatter, in addition to partial bleaching. Comparison of 1 mm multi-grain and single-grain data demonstrates that the luminescence signal of one multi-grain aliquot most likely is from a single grain. For this reason, variation in the number of photon counts due to the weak luminescence intensity and variations in beta microdosimetry have a bigger impact on the spread of dose distributions. However, we cannot quantify the particular impact of partial bleaching, weak luminescence intensity and beta microdosimetry. To account for the spread of the dose distribution, we use the central age model to calculate equivalent doses. Age calculations yield results in the range of 30-48 ka.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Optical dating; Ephemeral deposits; SW Jordan; Quartz; Dose distributions
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Chair Geomorphology - Univ.-Prof. Dr. Ludwig Zöller
Profile Fields > Advanced Fields > Ecology and the Environmental Sciences
Profile Fields > Advanced Fields > Nonlinear Dynamics
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Geomorphology
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: No
DDC Subjects: 500 Science > 550 Earth sciences, geology
Date Deposited: 11 Jan 2016 11:52
Last Modified: 11 Jan 2016 11:52
URI: https://eref.uni-bayreuth.de/id/eprint/29572