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首页> 外文期刊>Quaternary Science Reviews: The International Multidisciplinary Review Journal >The problems in ESR dating of tooth enamel of Early Pleistocene and the age of Longgupo hominid, Wushan, China
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The problems in ESR dating of tooth enamel of Early Pleistocene and the age of Longgupo hominid, Wushan, China

机译：中国巫山早更新世牙齿珐琅质的ESR测年和龙骨坡原始人的年龄问题

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Quite often ESR dating of tooth enamel provides underestimated ages. The factors, which may account for the age suppression are studied. For dating of the samples of Early Pleistocene, thermal fading of the g = 2.0018 signal during the burial time may also lead toage underestimation. Isothermal annealing of the g = 2.0018 line was studied in this work and a mixed first- and second-order kinetics was observed. Its implication to the practical dating purpose is discussed. It is suggested that if no uranium leakage is detected, ESR EU ages of Early Pleistocene enamel samples should be considered only as the lower limits of the true ages. Combined ESR and magnetic dating of the Longgupo profile, Wushan, China, assigns the Olduvai subchron to the fossil hominid-bearing layers of 7-8 of this profile. (C) 2000 Elsevier Science Ltd. Ail rights reserved. [References: 9]
机译：牙釉质的ESR约会经常会低估年龄。研究了可能导致年龄下降的因素。对于早期更新世样品的年代测定，在埋葬期间g = 2.0018信号的热衰减也可能导致牧草被低估。在这项工作中研究了g = 2.0018线的等温退火，并观察到混合的一级和二级动力学。讨论了其对实际约会目的的意义。建议如果未检测到铀泄漏，则应将早期更新世搪瓷样品的ESR EU年龄仅视为真实年龄的下限。结合ESR和中国龙山坡剖面的磁测年法，将Olduvai次亚时代划分为该剖面的7-8层人类化石。 （C）2000 Elsevier Science Ltd.版权所有。 [参考：9]

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