Radiocarbon dating minute amounts of bone (3-60 mg) with ECHoMICADAS.

Radiocarbon dating minute amounts of bone (3-60 mg) with ECHoMICADAS.
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使用 EHoMICADAS 对微量骨骼 (3-60 mg) 进行放射性碳测年。

DOI:
10.1038/s41598-017-07645-3
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发表时间:
2017-08-02
期刊:
影响因子:
4.6
通讯作者:
Tisnerat-Laborde N
Tisnerat-Laborde N
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Cersoy S;Zazzo A;Rofes J;Tresset A;Zirah S;Gauthier C;Kaltnecker E;Thil F;Tisnerat-Laborde N

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由于硬组织可以进行放射性碳年代测定,因此它们是建立过去5万年的考古年表、古环境重建和历史-地理过程的关键。加速器质谱仪(AMS)的出现彻底改变了考古学领域,但常规的AMS测年仍然需要60-200毫克的骨骼,这远远超过了小型脊椎动物或具有世袭价值的遗骸(例如原始人遗骸或加工过的骨制品)。在这里,我们提出了第一个放射性碳年代测定从微量的骨(3-60毫克)使用MIni CAbon数据系统(MICADAS)。优化的方案使我们能够提取足够的材料,为石墨靶生产0.2至1.0 mg的碳。我们的方法在可追溯到40,000 BP的已知年龄样本上进行了测试,并作为概念验证。然后,该方法被应用于两个考古遗址,从小型哺乳动物的单个骨骼中获得了可靠的日期。这些结果为小型或关键骨样本的常规测年开辟了道路。
Because hard tissues can be radiocarbon dated, they are key to establishing the archaeological chronologies, palaeoenvironmental reconstructions and historical-biogeographical processes of the last 50,000 years. The advent of accelerator mass spectrometers (AMS) has revolutionized the field of archaeology but routine AMS dating still requires 60–200 mg of bone, which far exceeds that of small vertebrates or remains which hold a patrimonial value (e.g. hominid remains or worked bone artefacts). Here, we present the first radiocarbon dates obtained from minute amounts of bone (3–60 mg) using a MIni CArbon DAting System (MICADAS). An optimized protocol allowed us to extract enough material to produce between 0.2 and 1.0 mg of carbon for graphite targets. Our approach was tested on known-age samples dating back to 40,000 BP, and served as proof of concept. The method was then applied to two archaeological sites where reliable dates were obtained from the single bones of small mammals. These results open the way for the routine dating of small or key bone samples.
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