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Testing optically stimulated luminescence dating on sand-sized quartz of deltaic deposits from the Sperchios delta plain, central Greece

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Journal of Palaeogeography 2018年第2期7卷 130-145页

作者： Evangelos Tsakalos elias dimitriou Maria Kazantzaki Christos Anagnostou John Christodoulakis Eleni Filippaki Hellenic Centre for Marine Research Institute of Inland Waters Laboratory of Archaeometry Institute of Nanoscience and Nanotechnology National Centre for Scientific Research N.C.S.R. "Demokritos" Department of Geophysics Division of Earth and Planetary Sciences Graduate School of Science Kyoto University Hellenic Centre of Marine Research Institute of Oceanography Climate Research Group Division of Environmental Physics and Meteorology Faculty of Physics National and Kapodistrian University of Athens

This study reports on the first investigation into the potential of luminescence dating to establish a chronological framework for the depositional sequences of the Sperchios delta plain, central Greece. A series of three borehole cores(20 m deep) and two shallow cores(4 m deep), from across the delta plain, were extracted, and samples were collected for luminescence dating. The luminescence ages of sand-sized quartz grains were obtained from small aliquots of quartz, using the Single-Aliquot Regenerative-dose(SAR) *** equivalent dose determination included a series of tests and the selection of the Minimum Age Model(MAM) as the most appropriate statistical model. This made it possible to confirm the applicability of quartz Optically Stimulated Luminescence(OSL) dating to establish absolute chronology for deltaic sediments from the Sperchios delta *** age results of the five cores showed that the deltaic sediments were deposited during the Holocene.A relatively rapid deposition is implied for the top14 m possibly as a result of the deceleration in the rate of the sea-level rise and the transition to terrestrial conditions, while on the deeper parts, the reduced sedimentation rate may indicate a lagoonal or coastal environment.

关键词： Luminescence dating Holocene Sedimentation rates Deltaic deposits Sperchios delta plain Central Greece

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Hydrogeologic Investigations in Western Crete by Using Isotopic Analyses and GIS Techniques

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Journal of Water Resource and Protection 2015年第12期7卷 923-937页

作者： elias dimitriou Paraskevi Tsintza Hellenic Centre for Marine Research Institute of Marine Biological Resources and Inland Waters Anavissos Greece

Using isotopic techniques to investigate hydrogeologic properties of aquifers and springs is a common approach nowadays that overcomes problems of monitoring classical hydrogeologic parameters such as piezometric levels and groundwater flow velocities. Nevertheless, interpretation of the results and maintenance of long term isotopic monitoring are also difficult and resource consuming tasks. In the present study the isotopic composition of springs and rain water has been examined in various sampling sites of Western Crete in order to identify spring-aquifer interactions and propose appropriate management and restoration measures. The output of this effort illustrated 4 main groups of springs sharing common isotopic characteristics and recharge zones. These potential recharge areas for each group have been delineated by combining the isotopic and geological properties of the entire area with the contribution of GIS techniques.

关键词： Groundwater Isotopic Analysis Oxygen Isotopes Aquifers Springs GIS Technique

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