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Potential use of Ti-center in ESR dating of fluvial sediment |
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| Authors: | H Tissoux C Falgures P Voinchet S Toyoda JJ Bahain J Desprie |
| Institution: | aDepartment of Applied Physics, Okayama University of Science 1-1 Ridai, Okayama 700-0005, Japan bDépartement de Préhistoire, Muséum National d’Histoire Naturelle, UMR 5198 du CNRS, 1 Rue René Panhard, 75013 Paris, France |
| Abstract: | The titanium centers of quartz (Ti–Li and Ti–H) were used to date fluvial sediments, together with the aluminum-center (Al). The response of these centers to the light from a solar simulator suggests that these centers are sensitive only to the UV component of the sunlight. Ti–Li and Ti–H proved to be totally bleachable by the sun and the necessary time was, respectively, 520 and 240 h. The multiple-center method was then applied on several alluvial sediments of the Creuse Valley (France). Equivalent doses and ages were calculated and Ti–Li center proved to be suitable for dating Middle Pleistocene fluvial terraces sediment. The use of both Ti–Li- and Al-centers is also recommended to determine if the sediment was well bleached at the time of deposition. |
| Keywords: | ESR Quartz Al-center Ti-centers Optical bleaching |
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