Serpentine bends site #1: Radiocarbon dating prehistoric soot and associated pictographs
Serpentine bends site #1: Radiocarbon dating prehistoric soot and associated pictographs
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DOI：
10.1016/j.jasrep.2021.102925
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发表时间：
2021-06
期刊：
影响因子：
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通讯作者：
M. Rowe;L. Loendorf;M. Miller;K. Steelman
中科院分区：
文献类型：
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作者：
M. Rowe;L. Loendorf;M. Miller;K. Steelman
在蛇形弯曲遗址1号，我们采用等离子体氧化法和加速器质谱法测定了两幅史前岩画和避难所天花板上的煤烟的放射性碳年代。象形文字结果显示，黑线为2325±3014C年BP，红色圆形图案轮廓为1315±4014C年BP。我们还利用x射线衍射法对避难所天花板上的黑色污渍中的热解碳进行了化学鉴定，确认它来自火灾烟雾。烟尘的四个放射性碳年龄代表了多次火灾的加权平均值，而不是单一事件。最古老的结果为2740±7014C年BP，来自最接近岩石基底的下垫黑烟，作为多层的加权平均值，代表了该地点人类活动的最低年龄。象形文字和史前煤烟的年代测定为确定世界各地岩石庇护所内人类活动的年代提供了新的方法，特别是在缺乏挖掘材料进行研究的情况下。
At Serpentine Bends Site #1, we employed plasma oxidation followed by accelerator mass spectrometry to radiocarbon date two prehistoric rock paintings as well as soot on the shelter ceiling. Pictograph results are 2325 ± 3014C years BP for a black line and 1315 ± 4014C years BP for a red outline of a circle motif. We also utilized X-ray diffraction to chemically identify pyrolyzed carbon in the black stain on the shelter ceiling, confirming that it is from fire smoke. Four radiocarbon ages for the soot represent a weighted average of multiple fires, instead of a single event. The oldest result of 2740 ± 7014C years BP is from the underlying black soot closest to the rock substrate and, as a weighted average of multiple layers, represents a minimum age for human activity at the site. Dating both pictographs and prehistoric soot provide novel methods for dating human activity within rockshelters around the world, especially when there is a lack of excavated materials for study.