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New climatic approaches to the analysis of the middle Paleolithic sequences: Combined taxonomic and isotopic charcoal analyses on a Neanderthal settlement, Les Canalettes (Aveyron, France)
Quaternary International ( IF 1.9 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.quaint.2020.11.042
Benjamin Audiard , Liliane Meignen , Thierry Blasco , Giovanna Battipaglia , Isabelle Théry-Parisot

Abstract Over the last decade, several studies have indicated the potential for the δ13C isotope signal of charcoals to act as a new local paleoclimatic/paleoenvironmental proxy, complementary to taxonomic analyses. These studies mainly focused on archeological charcoal from the Holocene series, but the potential of the method to be applied Pleistocene sequences is still under debate. Understanding climate-driven variability in stable carbon isotope ratios of modern samples is fundamental for the accurate characterization of past climate information based on the δ13C of charred material. In a previous study, we laid the methodological foundation to apply the method to Pleistocene contexts. Here, we present the δ13C isotopic signal from Pinus spp. charcoal in a well stratified middle Paleolithic site: “Les Canalettes” (Aveyron, France). We demonstrate that the use of isotopic analyses on ancient charcoal of the genus Pinus from the quaternary period could provide a reliable paleoclimatic marker with high resolution and provide data that is complementary to taxonomic studies. A continuous increase in humidity is observed, with a warming episode identified at the top of the sequence. These results place the occupation of the site in a less rigorous phase at the beginning of MIS 4 and underline the importance of the Causses in the mobility system of several generations of Neanderthals.

中文翻译:

旧石器时代中期序列分析的新气候方法:对尼安德特人聚居地 Les Canalettes(法国阿韦龙)的分类学和同位素木炭分析相结合

摘要 在过去十年中,几项研究表明,木炭的 δ13C 同位素信号有可能作为新的当地古气候/古环境代理,对分类分析进行补充。这些研究主要集中在全新世系列的考古木炭上,但该方法应用于更新世序列的潜力仍在争论中。了解现代样品稳定碳同位素比率的气候驱动变异性对于基于烧焦材料的 δ13C 准确表征过去的气候信息至关重要。在之前的一项研究中,我们为将该方法应用于更新世背景奠定了方法论基础。在这里,我们展示了来自松属植物的 δ13C 同位素信号。旧石器时代中期遗址中的木炭:“Les Canalettes”(法国阿韦龙)。我们证明,对第四纪松属古木炭的同位素分析可以提供可靠的高分辨率古气候标记,并提供与分类学研究互补的数据。观察到湿度持续增加,在序列顶部确定了变暖事件。这些结果在 MIS 4 开始时将该地点的占领置于一个不太严格的阶段,并强调了 Causses 在几代尼安德特人的移动系统中的重要性。在序列顶部确定了变暖事件。这些结果在 MIS 4 开始时将该地点的占领置于一个不太严格的阶段,并强调了 Causses 在几代尼安德特人的移动系统中的重要性。在序列顶部确定了变暖事件。这些结果在 MIS 4 开始时将该地点的占领置于一个不太严格的阶段,并强调了 Causses 在几代尼安德特人的移动系统中的重要性。
更新日期:2020-11-01
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