Universität zu Köln

Bartz, Melanie ORCID: 0000-0002-4703-6057, Rixhon, Gilles, Duval, Mathieu ORCID: 0000-0003-3181-7753, King, Georgina E., Posada, Claudia Alvarez, Pares, Josep M. and Brueckner, Helmut (2018). Successful combination of electron spin resonance, luminescence and palaeomagnetic dating methods allows reconstruction of the Pleistocene evolution of the lower Moulouya river (NE Morocco). Quat. Sci. Rev., 185. S. 153 - 172. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 0277-3791

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Abstract

Based on a combination of Electron Spin Resonance (ESR) dating of quartz, luminescence dating of K-feldspar and palaeomagnetism, this study presents the first chronostratigraphic framework for the Pleistocene fluvial deposits of the lower Moulouya river in the Triffa basin (NE Morocco). K-feldspar pIRIR(225) and pIRIR(290) signals of all samples are saturated, suggesting fluvial deposition at least as early as the Middle Pleistocene (similar to 0.39-0.80 Ma). Consequently, further chronological information was obtained with ESR dating of quartz grains from the ancient Pleistocene fluvial deposits. As for ESR, the multiple centres approach provides equivalent dose values derived from the Al and Ti centres that mostly agree within 1 sigma-error, suggesting complete signal resetting from the former during fluvial transport. ESR dating results yield Calabrian deposition ages for all river profiles from similar to 1.1 to similar to 1.5 Ma. These ages are remarkably consistent with the palaeomagnetic results: the occurrence of mostly reversed polarity in the deposits indicates a Matuyama age (>0.78 Ma). While low incision rates in the Triffa basin (0.025 +/- 0.003 mm/a) related to thrusting activity during the Calabrian could be inferred, the fluvial record points to an acyclic and discontinuous sedimentation pattern over the last similar to 1.3 Ma. It thereby probably rules out climate as the main driver for fluvial aggradation in the lowermost sedimentary basin. At a regional scale, several indicators point to transient fluvial response resulting from major Quaternary tectonic activity along the Beni Snassen gorge, located directly upstream of the investigated basin. We suggest that a capture event at the margin of the uplifting Beni Snassen massif occurred between 1.04 and 1.36 Ma at the latest and subsequently led to the creation of the gorge. (C) 2018 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bartz, Melanie UNSPECIFIED orcid.org/0000-0002-4703-6057 UNSPECIFIED Rixhon, Gilles UNSPECIFIED UNSPECIFIED UNSPECIFIED Duval, Mathieu UNSPECIFIED orcid.org/0000-0003-3181-7753 UNSPECIFIED King, Georgina E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Posada, Claudia Alvarez UNSPECIFIED UNSPECIFIED UNSPECIFIED Pares, Josep M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Brueckner, Helmut UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-191580
DOI:	10.1016/j.quascirev.2017.11.008
Journal or Publication Title:	Quat. Sci. Rev.
Volume:	185
Page Range:	S. 153 - 172
Date:	2018
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	0277-3791
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language EPHEMERAL STREAM DEPOSITS; BLEACHED QUARTZ GRAINS; LANDSCAPE EVOLUTION; CRUSTAL DEFORMATION; MIDDLE PLEISTOCENE; TERRACE STAIRCASE; IBERIAN PENINSULA; ACTIVE TECTONICS; PALEOLITHIC SITE; FLUVIAL DYNAMICS Multiple languages Geography, Physical; Geosciences, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/19158