The significance of obsidian hydration dating in assessing the integrity of Holocene midden, Hokkaido, northern Japan
The significance of obsidian hydration dating in assessing the integrity of Holocene midden, Hokkaido, northern Japan
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黑曜石水合测年对评估日本北部北海道全新世贝丘完整性的意义
DOI：
10.1016/j.quaint.2015.01.029
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发表时间：
2016
影响因子：
2.2
通讯作者：
Y.
中科院分区：
文献类型：
--
作者：
Nakazawa;Y.
自 1960 年首次发明以来，黑曜石水合测年法现已被公认为是一种基于水合边缘厚度测量来确定考古遗址日期的计时方法。与人们对影响水合率和测量可靠性的各种因素的认识不断提高相反，边缘厚度测量的有效性是否以及在多大程度上与感兴趣的事件相对应的问题却很少被讨论。在此，从日本北部北海道 Ocharasenai (OCH) 全新世遗址早期绳纹古墓遗址的遗址完整性角度，讨论了指定人类遗址占领事件的黑曜石水合日期的有效性。通过对最初提取的样本和评估有效性后选择的样本之间的显微镜测量平均边缘厚度进行比较，测试了史前狩猎采集者显然留下的贝坑的预期完整性。这两组之间的估计水合日期没有统计差异，这支持了贝丘的高度完整性。 OCH 的绳文早期占领时期估计为距今 4388 年至 4942 年，属于全新世中期末期。目前的检查结果表明，黑曜石水合测年将有助于了解位点形成过程。
Since its novel invention in 1960, obsidian hydration dating is now recognized as the chronometric method to give dates of archaeological sites, based on measurements of hydration rim thickness. Contrary to the increased awareness of various factors that affect hydration rates and reliability in measurements, the question whether and the extent to which the validity in the rim thickness measurements corresponds to the interested event has been less discussed. Here, validity of obsidian hydration dates that designate event of human site occupations is discussed in terms of site integrity of the Early Jomon midden in the Holocene site of Ocharasenai (OCH), Hokkaido, northern Japan. Expected integrity of the midden evidently left by prehistoric hunter–gatherers is tested through a comparison of microscopically-measured average rim thicknesses between the primarily extracted specimens and those chosen after assessing the validity. No statistical difference in estimated hydration dates between these two groups supports high integrity of the midden. The estimated date for the Early Jomon occupation at the OCH is 4388–4942 BP, fallen into the end of Middle Holocene. Results of the present examination indicate that obsidian hydration dating will aid to understand site formation processes.