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Klasen, Nicole, Hilgers, Alexandra, Schmidt, Christoph ORCID: 0000-0002-2309-3209, Bertrams, Manuel, Schyle, Daniel, Lehmkuhl, Frank ORCID: 0000-0002-6876-7377, Richter, Juergen and Radtke, Ulrich (2013). Optical dating of sediments in Wadi Sabra (SW Jordan). Quat. Geochronol., 18. S. 9 - 17. OXFORD: ELSEVIER SCI LTD. ISSN 1878-0350

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Abstract

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. (C) 2013 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Klasen, Nicole UNSPECIFIED UNSPECIFIED UNSPECIFIED Hilgers, Alexandra UNSPECIFIED UNSPECIFIED UNSPECIFIED Schmidt, Christoph UNSPECIFIED orcid.org/0000-0002-2309-3209 UNSPECIFIED Bertrams, Manuel UNSPECIFIED UNSPECIFIED UNSPECIFIED Schyle, Daniel UNSPECIFIED UNSPECIFIED UNSPECIFIED Lehmkuhl, Frank UNSPECIFIED orcid.org/0000-0002-6876-7377 UNSPECIFIED Richter, Juergen UNSPECIFIED UNSPECIFIED UNSPECIFIED Radtke, Ulrich UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-471271
DOI:	10.1016/j.quageo.2013.08.002
Journal or Publication Title:	Quat. Geochronol.
Volume:	18
Page Range:	S. 9 - 17
Date:	2013
Publisher:	ELSEVIER SCI LTD
Place of Publication:	OXFORD
ISSN:	1878-0350
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language NORTHWESTERN NEGEV DUNEFIELD; DOSE DISTRIBUTIONS; SOUTHERN JORDAN; COSMIC-RAY; DEAD-SEA; SINGLE; ISRAEL; QUARTZ; OSL; LUMINESCENCE Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/47127