Programs > By author > Brutel Nicolas

New methodology using femtosecond laser ablation ICP-MS for direct U-series disequilibrium dating of ostrich eggshell fragments
Loïc Martin  1, *@  , Asmodée Galy  1@  , Nicolas Brutel  1@  , Marion Taris  2@  , Christophe Pécheyran  3@  , Eric Douville  4@  , Edwige Pons-Branchu  5@  , Nicholas Conard  6@  , Guillaume Porraz  7@  , Aurore Val  8@  , Norbert Mercier  1@  , Chantal Tribolo  1@  , Yannick Lefrais  1@  , Nadia Cantin  1@  
1 : IRAMAT-CRP2A, University Bordeaux Montaigne
Centre National de la Recherche Scientifique - CNRS
2 : Institut des sciences analytiques et de physico-chimie pour lénvironnement et les materiaux  (IPREM)  -  Website
Université de Pau et des Pays de l'Adour, Centre National de la Recherche Scientifique : UMR5254
Université de Pau et des Pays de L'adour, Hélioparc Pau Pyrénées, 2 avenue du Président Angot, 64053 PAU CEDEX 9 -  France
3 : Laboratoire de chimie analytique bio-inorganique et environnement  (LCABIE UMR CNRS/UPPA IPREM 5254)
Université de Pau et des Pays de l’Adour
Hélioparc Pau Pyrénées, 2 avenue du Président Angot, F-64053 PAU Cedex 9 -  France
4 : Laboratoire des Sciences du Climat et de l'Environnement (LSCE)
Bâtiment 12, 91198 Gif-sur-Yvette Cedex, France -  France
5 : Laboratoire des Sciences du Climat et de l'Environnement  (LSCE)  -  Website
Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), CEA, CNRS : UMR8212
Bât. 12, Avenue de la Terrasse, 91190 Gif-sur-Yvette -  France
6 : University of Tübingen  -  Website
7 : UMR 7041 ArScAn
Centre National de la Recherche Scientifique - CNRS
8 : University of Witwatersrand
* : Corresponding author

During the Middle Stone Age in South Africa, anatomically modern humans developed complex behaviors involving symbols and art. Huge efforts have been done for establishing the chronology of the emergence and spreading of these behaviors. However, the time range is over the limits of the C14 dating, and the complexity of the sedimentary deposits results in methodological issues for luminescence dating. In order to enrich the chronological tools, we have adapted the U-series disequilibrium dating method applied to ostrich eggshell fragments: a new protocol for direct isotopic measurement with femtosecond laser ablation ICP-MS has been developed. This method only necessitates a few milligrams of matter, making it usable on very small fragments. Moreover, it does not require heavy chemical preparation and is efficient even for low concentration (ppb) of uranium. Therefore this method opens new possibilities for absolute dating and chronological studies.

Here, we present our protocol, as well as noticeable considerations on sample conservation and uranium uptake and leaching phenomena.

Online user: 1 RSS Feed