Single-grain and multi-grain OSL dating of river terrace sediments in the Tabernas Basin,SE Spain |
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| Institution: | 1. School of Geography, Earth and Environmental Sciences, Plymouth University, Drakes Circus, Devon PL4 8AA, UK;2. Center for Nuclear Technologies, Technical University of Denmark, DTU Risø Campus, Denmark;3. Nordic Laboratory for Luminescence Dating, Department of Geoscience, University of Aarhus, Risø Campus, Denmark;1. Leibniz Institute for Applied Geophysics (LIAG), Stilleweg 2, 30655 Hannover, Germany;2. Department of Geography, RWTH Aachen University, Templergraben 55, 52056 Aachen, Germany;1. Department of Chemical and Geological Sciences, University of Cagliari, Cagliari, Italy;2. Nordic Laboratory for Luminescence Dating, Department of Geoscience, University of Aarhus, DTU Risø Campus, Roskilde, Denmark;3. Center for Nuclear Technologies, Technical University of Denmark, Risø Campus, Denmark;4. Institute for Biometeorology, National Research Council of Italy, Sassari, Italy;5. Department of Architecture, Design and Planning, University of Sassari, Sassari, Italy;6. CNR-Institute of Geosciences and Earth Resources, CNR, Via Moruzzi 1, 56124 Pisa, Italy;1. Sheffield Luminescence Laboratory, Geography Department, University of Sheffield, Winter St., Sheffield S10 2TN, UK;2. Department of Archaeology, University of Sheffield, Northgate House, West Street, Sheffield S1 4ET, UK;3. Environment Department, University of York, Heslington, York SO10 5DD, UK;1. Interdisciplinary Research Institute on Bio-Nano-Science of Babe?-Bolyai University, Treboniu Laurean 42, 400271 Cluj-Napoca, Romania;2. Faculty of Physics, Babe?-Bolyai University, M. Kog?lniceanu 1, 400084 Cluj-Napoca, Romania;3. Chair of Geomorphology, University of Bayreuth, 95440 Bayreuth, Germany;4. Faculty of Environmental Science and Engineering, Babe?-Bolyai University, Fântânele 30, 400294 Cluj-Napoca, Romania;5. Faculty of Humanities, Valahia University, Lt. Stancu Ion 34-36, 130115 Târgovi?te, Romania;6. Institute of Speology, Romanian Academy, 400006 Cluj-Napoca, Romania;1. Archaeometry Laboratory, University of Science and Technology of China, Hefei, China;2. Department of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong;1. State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;2. Department of Earth Sciences, University of Hong Kong, Hong Kong, China;3. Centre for Archaeological Science, School of Earth and Environmental Sciences, University of Wollongong, Wollongong, NSW 2522, Australia;4. Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | River terraces represent important records of landscape response to e.g. base-level change and tectonic movement. Both these driving forces are important in the southern Iberian Peninsula. In this study, Optically Stimulated Luminescence (OSL) dating was used to date two principal river terraces in the Tabernas Basin, SE Spain. A total of 23 samples was collected from the fluvial terraces for dating using quartz OSL. Sixteen of the samples could not be dated because of low saturation levels (e.g. typical 2xD0 < 50 Gy). The remaining seven samples (5 fossil and 2 modern analogues) were investigated using both multi-grain and single-grain analysis. Single grain results show that: (i) measurements from multi-grain aliquots overestimate ages by up to ～ 4 ka for modern analogues and young samples (<5 ka), presumably because (ii) the presence of many saturated grains has biased the multi-grain results to older ages. Despite the unfavourable luminescence characteristics we are able to present the first numerical ages for two terrace aggradation stages in the Tabernas Basin, one at ～16 ka and the other within the last 2 ka. |
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| Keywords: | Fluvial Tectonics Climate OSL |
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