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Defining isotopic signatures of potential procurement sources: A case study in the Mesa Verde region of the US Southwest
Journal of Archaeological Science: Reports Pub Date : 2022-01-11 , DOI: 10.1016/j.jasrep.2021.103334
Jacques Burlot 1 , Karen Schollmeyer 2 , Virginie Renson 1 , Joan Brenner Coltrain 3 , Amanda Werlein 1, 4 , Jeffrey R. Ferguson 1, 5
Affiliation  

Combining strontium and oxygen isotope analyses has proved useful in determining animal procurement sources in archaeological case studies. In this paper, we analysed 87Sr/86Sr and δ18O of 55 rodents from archaeological contexts and 94 plants of the Mesa Verde and McElmo Dome regions (US Southwest) to estimate their regional isotopic signatures. We asked to what extent the new isotopic data would allow us to isolate one region from another, thus providing a background for interpreting fauna acquisition strategies. The results clearly show trends in bioavailable Sr across the Mesa Verde landscape. The lower 87Sr/86Sr values are synonymous with areas composed of igneous rock, while the highest values correspond, for the most part, to the San Juan Mountains, a region that likely provided large game hunting opportunities. Moreover, the McElmo Dome area associated with the sites under study is represented by a uniquely narrow range of Sr values suggesting that prey acquired outside a 10 km foraging range from such sites will be identifiable. Although plant oxygen isotope data did not further differentiate specific zones within the studied area, the significant correlation of plant δ18O with elevation will be useful for archaeologists to examine large game hunting strategies. Furthermore, this study expands the existing database of isotopic signatures for the American Southwest and, in particular, the San Juan Basin and its surroundings.



中文翻译:

定义潜在采购来源的同位素特征:美国西南部 Mesa Verde 地区的案例研究

结合锶和氧同位素分析已被证明有助于确定考古案例研究中的动物采购来源。在本文中,我们分析了来自考古背景的 55 种啮齿动物以及 Mesa Verde 和 McElmo Dome 地区(美国西南部)的 94 种植物的87 Sr/ 86 Sr 和 δ 18 O,以估计它们的区域同位素特征。我们询问新的同位素数据在多大程度上允许我们将一个区域与另一个区域隔离开来,从而为解释动物采集策略提供背景。结果清楚地显示了 Mesa Verde 地区生物可利用 Sr 的趋势。较低的87 Sr/ 86Sr 值是由火成岩组成的区域的代名词,而最高值在很大程度上对应于圣胡安山脉,该地区可能提供大量狩猎机会。此外,与正在研究的地点相关的 McElmo Dome 区域由一个独特的窄范围 Sr 值表示,这表明从这些地点获得的 10 公里觅食范围之外的猎物将是可识别的。虽然植物氧同位素数据并未进一步区分研究区域内的特定区域,但植物 δ 18的显着相关性带有海拔的 O 将有助于考古学家检查大型猎物狩猎策略。此外,这项研究扩展了美国西南部,特别是圣胡安盆地及其周边地区的现有同位素特征数据库。

更新日期:2022-01-12
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