Guide to Luminescence Dating Techniques and Their Application to Paleoseismic Research
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Thermoluminescence dating
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Over the last 60 years, luminescence dating has developed into a robust chronometer for applications in earth sciences and archaeology. The technique is particularly useful for dating materials ranging in age from a few decades to around 100,000–150,000 years. In this chapter, following a brief outline of the historical development of the dating method, basic principles behind the technique are discussed. This is followed by a look at measurement equipment that is employed in determining age and its operation. Luminescence properties of minerals used in dating are then examined after which procedures used in age calculation are looked at. Sample collection methods are also reviewed, as well as types of materials that can be dated. Continuing refinements in both methodology and equipment promise to yield luminescence chronologies with improved accuracy and extended dating range in the future and these are briefly discussed.
Thermoluminescence dating
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The Quaternary plays an important role in the geological history because it is closely related to the human beings.Therefore highly reliable and precise Quaternary dating is needed.Now geologists have improved and developed many Quaternary dating methods.This paper discusses some recent advances in the Quaternary dating in respect to rock stratigraphy,biology,magnetic stratigraphy,archaeology and isotope dating.The main progress of these methods is as follows: the dating precision and efficiency have bean raised markedly while the required dosage of a dated sample is reduced significantly because of the development of technologies,such as the Ar-Ar laser microprobe dating;and these dating methods can be used in wider research fields. For example,the ESR method has used in dating of tills and the sequences established according to the dating results may correlate with the deep sea oxygen isotope stages. However,it is necessary to have plenty of geological experience,choose appropriate dating methods according to the features of the samples and use as many appropriate methods as possible for comparative dating to improve the reliability of dating.
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