‘Old wood’ effect in radiocarbon dating of prehistoric cremated bones?
‘Old wood’ effect in radiocarbon dating of prehistoric cremated bones?
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史前火化骨头放射性碳测年中的“老木头”效应？
DOI：
10.1016/j.jas.2012.05.034
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发表时间：
2013
影响因子：
2.8
通讯作者：
H. Thrane
中科院分区：
文献类型：
--
作者：
J. Olsen;J. Heinemeier;Karen Margrethe Hornstrup;P. Bennike;H. Thrane
在过去的十年里，出现了许多关于成功地对火化的骨骼进行放射性碳测年的报道。放射性碳测年的成功与否取决于焚烧过程中的温度和无机骨基质的重结晶程度。在火化过程中，骨骼经历了重大的形态和矿物学变化，这引发了一些有趣的问题，并对考古火化骨骼中碳源的来源进行了讨论。最近的实验室实验表明，燃烧气氛的性质对火化骨骼中的来源碳起着重要作用。因此，放射性碳测年火化的骨头可能是在测定用于火化的木材的年龄。在这里，我们比较了高精度的放射性碳测年人骨与橡木棺材中相关的树状年代学年龄。我们发现，树枝年代学年龄与火化骨龄73±2614C年之间的年龄差异最好地解释了所谓的老木材效应。
Numerous reports of successful radiocarbon dating of cremated bones have emerged during the last decade. The success of radiocarbon dating cremated bones depends on the temperature during burning and the degree of recrystallisation of the inorganic bone matrix. During cremation bones undergo major morphological and mineralogical changes which have raised some interesting questions and discussion on the origin of the carbon source in archaeologically cremated bones. Recent laboratory experiments reveal that the properties of the combustion atmosphere play a significant role regarding the source carbon in cremated bones. Thus radiocarbon dating cremated bones is potentially dating the wood used for the cremation fire. Here we compare a high precision radiocarbon dated human bone with an associated dendrochronological age from an oak coffin. We find that the age discrepancy between the dendrochronological age and the cremated bone of 73 ± 2614C yr is best accounted for by the so called ‘old wood’ effect.