Universität zu Köln

Kreutzer, Sebastian ORCID: 0000-0002-0734-2199, Duval, Mathieu ORCID: 0000-0003-3181-7753, Bartz, Melanie ORCID: 0000-0002-4703-6057, Bertran, Pascal ORCID: 0000-0003-3334-9869, Bosq, Mathieu, Eynaud, Frederique, Verdin, Florence and Mercier, Norbert ORCID: 0000-0002-6375-9108 (2018). Deciphering long-term coastal dynamics using IR-RF and ESR dating: a case study from Medoc, south-west France. Quat. Geochronol., 48. S. 108 - 121. OXFORD: ELSEVIER SCI LTD. ISSN 1878-0350

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Abstract

A proper understanding of local palaeoenvironmental histories is an iterative process. Previously settled interpretations suddenly demand a reconsideration triggered by findings from sites not accessible before. The coastline of the Medoc area in south-west France faced considerable recent erosion, providing new valuable insights into the history of the local Holocene and Pleistocene deposits; mainly of estuarine, lacustrine and aeolian origin. In the framework of the project LITAQ for reconstructing the coastal history of the Aquitaine basin, new recently outcropped sediment profiles have been investigated. To establish the chronological framework, for the first time optically stimulated luminescence (OSL) on quartz, infrared radiofluorescence (IR-RF) on K-feldspar were applied in conjunction with multiple-centres electron spin resonance (ESR) dating on quartz. Our approach combines routine luminescence dating application with methodological investigations, with a focus on IR-RF and ESR dating. IR-RF and ESR ages are consistently older than the OSL ages, presumably due to insufficient bleaching, however, they are consistent within 2 sigma. Our study confirms that the investigated area is covered by Holocene sands, following Pleistocene colluvial and aeolian sandy deposits mainly deposited in a periglacial context during MIS 8 and MIS 10. The base of the profiles appears to consist of interglacial estuarine deposits, probably from the Holsteinian (MIS 11), supporting the theory of a progressive replacement of a tide influenced marsh by a peaty fresh-water pond during that period. Finally, IR-RF and multiple-centres ESR dating can be considered as valuable tools to decipher Middle Pleistocene landscape dynamics.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kreutzer, Sebastian UNSPECIFIED orcid.org/0000-0002-0734-2199 UNSPECIFIED Duval, Mathieu UNSPECIFIED orcid.org/0000-0003-3181-7753 UNSPECIFIED Bartz, Melanie UNSPECIFIED orcid.org/0000-0002-4703-6057 UNSPECIFIED Bertran, Pascal UNSPECIFIED orcid.org/0000-0003-3334-9869 UNSPECIFIED Bosq, Mathieu UNSPECIFIED UNSPECIFIED UNSPECIFIED Eynaud, Frederique UNSPECIFIED UNSPECIFIED UNSPECIFIED Verdin, Florence UNSPECIFIED UNSPECIFIED UNSPECIFIED Mercier, Norbert UNSPECIFIED orcid.org/0000-0002-6375-9108 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-170047
DOI:	10.1016/j.quageo.2018.09.005
Journal or Publication Title:	Quat. Geochronol.
Volume:	48
Page Range:	S. 108 - 121
Date:	2018
Publisher:	ELSEVIER SCI LTD
Place of Publication:	OXFORD
ISSN:	1878-0350
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ELECTRON-SPIN-RESONANCE; BLEACHED QUARTZ GRAINS; FELDSPAR RADIOLUMINESCENCE; K-FELDSPAR; TI CENTERS; LUMINESCENCE; CHRONOLOGY; SAMPLES; RECONSTRUCTION; PROTOCOL Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/17004