A CENTENNIAL AMBIGUITY: THE CHALLENGE OF RESOLVING THE DATE OF THE JEAN-BAPTISTE LAINÉ (MANTLE), ONTARIO, SITE—AROUND AD 1500 OR AD 1600?—AND THE CASE FOR WOOD-CHARCOAL AS A TERMINUS POST QUEM
A CENTENNIAL AMBIGUITY: THE CHALLENGE OF RESOLVING THE DATE OF THE JEAN-BAPTISTE LAINÉ (MANTLE), ONTARIO, SITE—AROUND AD 1500 OR AD 1600?—AND THE CASE FOR WOOD-CHARCOAL AS A TERMINUS POST QUEM
复制标题
DOI：
10.1017/rdc.2022.23
复制
发表时间：
2022-04
期刊：
影响因子：
8.3
通讯作者：
S. Manning;J. Birch
中科院分区：
文献类型：
--
作者：
S. Manning;J. Birch
摘要孤立地考虑，来自安大略Jean-Baptiste Lainé（以前的地幔）遗址的短命植物遗骸的放射性碳（14 C）年代测定产生了一个模糊的结果：大约在公元1500年或公元1600年左右的概率或多或少相似。这个村子的遗址，可能不超过ca。20-30年的总持续时间，说明了在14 C校准曲线中具有反转/平台的各个时期的高分辨率测年的挑战。我们发现的另一个问题是，在OxCal分析下，随着测年强度的增加，短时间地点的测年概率有时会被过度压缩，并且概率会偏离真实的年龄范围，特别是在逆转/平台期。为了解决这两个问题，需要额外的限制。虽然树轮测序14 C“摆动匹配”是最好的选择，在没有这样的选择，我们调查如何，在木木炭样品中使用内置的年龄可以用来区分可能正确的日期范围。这种方法可以解决约会中的模糊性，例如，在北美东北部的较短持续时间的晚期林地村庄网站，但也与14 C校准曲线上的反转/高原事件对应的其他短持续时间的情况下。我们把Jean-Baptiste Lainé遗址最有可能放在约公元1595-1626年（95.4%的可能性）。
ABSTRACT Considered in isolation, the radiocarbon (14C) dates on short-lived plant remains from the Jean-Baptiste Lainé (formerly Mantle) site, Ontario, yield an ambiguous result: more or less similar probability around AD 1500 or alternatively around AD 1600. This village site, likely of no more than ca. 20–30 years total duration, illustrates the challenges of high-resolution dating across periods with a reversal/plateau in the 14C calibration curve. Another problem we identify is the tendency for dating probability for short-duration sites to sometimes be overly compressed as dating intensity increases under analysis with OxCal, and for probability to shift away from the real age range especially during reversal/plateau episodes. To address both issues additional constraints are necessary. While a tree-ring sequenced 14C “wiggle-match” is the best option where available, we investigate how, in the absence of such an option, use of the in-built age in wood-charcoal samples can be used to distinguish the likely correct date range. This approach can resolve ambiguities in dating, e.g., for shorter-duration Late Woodland village sites in northeastern North America, but also other short-duration cases corresponding with reversal/plateau episodes on the 14C calibration curve. We place the Jean-Baptiste Lainé site most likely in a range between ca. AD 1595–1626 (95.4% probability).