Irsl dating

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Recent work on infrared stimulated luminescence IRSL dating has focussed on finding and testing signals which show less or negligible fading. For Early Pleistocene samples of both European and Chinese loess natural post-IR IRSL signals lying in the saturation region of the laboratory dose response curve have been observed; this suggests that there is no significant fading in nature. As a contribution to the further testing of post-IR IRSL dating, we have used 18 samples from two Japanese loess profiles for which quartz OSL and tephra ages up to ka provide age control.

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This paper aims to provide an overview concerning the optically stimulated luminescence OSL dating method and its applications for geomorphological research in France. An outline of the general physical principles of luminescence dating is given. A case study of fluvial sands from the lower terrace of the Moselle valley is then presented to describe the range of field and laboratory procedures required for successful luminescence dating.

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Late Pleistocene marine terraces formed during interglacial sea-level highstands are widely distributed across the Japanese islands. Tephrochronology has been used to correlate these terraces with marine isotope stages MIS Machida and Arai, Marker tephras, such as Ontake Pm1 On-Pm1, However, marker tephras are not always found in marine terrace deposits; thus, the chronology of marine terraces has often been determined by counting interglacial deposits backward from MIS 5e.

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This paper aims to provide an overview concerning the optically stimulated luminescence OSL dating method and its applications for geomorphological research in France. An outline of the general physical principles of luminescence dating is given. A case study of fluvial sands from the lower terrace of the Moselle valley is then presented to describe the range of field and laboratory procedures required for successful luminescence dating.

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Quartz has been the main mineral used for optically stimulated luminescence OSL dating of sediments over the last decade. The application of IRSL dating of feldspars, however, has long been hampered by the anomalous fading effect. These procedures have raised the prospect of isolating a non-fading IRSL component for dating Quaternary deposits containing feldspars.

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Luminescence dating refers to a group of methods of determining how long ago mineral grains were last exposed to sunlight or sufficient heating. It is useful to geologists and archaeologists who want to know when such an event occurred. It uses various methods to stimulate and measure luminescence.

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Widoczny [Schowaj] Abstrakt. Early Cenozoic two-phase extension and late Cenozoic thermal subsidence and inversion of the Bohai Basin, North China. Radiation Measurements —, DOI

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Optical dating is based on an anti-Stokes photon emission generated by electron-hole recombination within quartz or feldspar; it relies, by default, on destructive read-out of the stored chronometric information. We present here a fundamentally new method of optical read-out of the trapped electron population in feldspar. Since IRPL can be induced even in traps remote from recombination centers, it is likely to contain a stable non-fadingsteady-state component.

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