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26Al/10Be Burial Dating of the Middle Pleistocene Yiyuan Hominin Fossil Site Shandong Province Northern China

机译:中国山东省中更新世宜源人文化石遗址26Al / 10Be埋葬年代

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摘要

The Yiyuan hominin fossil site is one of the few localities in China where a partial skullcap and several loose teeth of Homo erectus have been discovered. Yiyuan was previously assigned broadly to the Middle Pleistocene by biostratigraphical correlation and ESR/U-series dating. Here, we report the first application of a radio-isotopic dating method to the site. 26Al/10Be burial dating results derived from two sand samples from the fossiliferous deposits show that the hominin fossils can be confidently dated to 0.64 ± 0.08 Ma (million years ago). The reliability of this age is supported by the zero age of modern fluvial sediment near the cave. Our result is consistent with the age estimation based on biostratigraphic correlation and supports the argument that the Yiyuan and Zhoukoudian Locality 1 H. erectus fossils are contemporaneous. The results presented here, along with other recent chronological studies on Chinese Middle Pleistocene hominin sites, indicate that the time span from 600–400 ka (thousand years ago) is a critical period for human evolution in East Asia. Importantly, this time bracket includes several major climatic changes that would have influenced hominins, both morphologically and behaviorally.
机译:沂源人化石遗址是中国为数不多的发现部分直立帽和几颗直立人牙齿的地区之一。宜源以前通过生物地层学相关性和ESR / U系列年代划分广泛地划分为中更新世。在这里,我们报告了放射性同位素定年方法在该站点的首次应用。从化石矿床的两个砂样中得到的 26 Al / 10 Be埋葬年代测定结果表明,人类的化石可以确信地年代为0.64±0.08 Ma(百万年前) 。洞穴附近现代河流沉积物的零年龄支持了这一年龄的可靠性。我们的结果与基于生物地层学相关性的年龄估计相一致,并支持这样的论点,即沂源和周口店地区1 H.直立石化石是同期的。此处给出的结果,以及最近对中国中更新世人类素部位的其他时间序列研究表明,600-400 ka(一千年前)的时间跨度是东亚人类进化的关键时期。重要的是,此时间段包括几个主要的气候变化,这些变化在形态和行为上都会影响人参。

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