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High-precision 14C and 40Ar/39Ar dating of the Campanian Ignimbrite (Y-5) reconciles the time-scales of climatic-cultural processes at 40 ka

机译:坎帕尼亚着火岩(Y-5)的高精度14C和40Ar / 39Ar测年与40 ka的气候-文化过程的时间尺度一致

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摘要

The Late Pleistocene Campanian Ignimbrite (CI) super-eruption (Southern Italy) is the largest known volcanic event in the Mediterranean area. The CI tephra is widely dispersed through western Eurasia and occurs in close stratigraphic association with significant palaeoclimatic and Palaeolithic cultural events. Here we present new high-precision 14C (34.29 ± 0.09 14C kyr BP, 1σ) and 40Ar/39Ar (39.85 ± 0.14 ka, 95% confidence level) dating results for the age of the CI eruption, which substantially improve upon or augment previous age determinations and permit fuller exploitation of the chronological potential of the CI tephra marker. These results provide a robust pair of 14C and 40Ar/39Ar ages for refining both the radiocarbon calibration curve and the Late Pleistocene time-scale at ca. 40 ka. In addition, these new age constraints provide compelling chronological evidence for the significance of the combined influence of the CI eruption and Heinrich Event 4 on European climate and potentially evolutionary processes of the Early Upper Palaeolithic.
机译:晚更新世的Campanian Ignimbrite(CI)超级喷发(意大利南部)是地中海地区已知的最大火山事件。特菲拉分布在整个欧亚大陆西部,地层联系紧密,伴有重要的古气候和旧石器时代文化事件。在这里,我们介绍了新的高精度 14 C(34.29±0.09 14 C kyr BP,1σ)和 40 Ar / 39 < / sup> Ar(39.85±0.14 ka,95%置信水平)的测年结果,它显着改善或增强了先前的年龄确定,并允许充分利用CI特发拉标记的年代潜力。这些结果提供了一个稳定的 14 C和 40 Ar / 39 Ar年龄对,用于细化放射性碳校准曲线和晚更新世时间。规模约。 40 ka。此外,这些新的年龄限制为CI爆发和Heinrich事件4对欧洲气候和上古旧石器时代早期可能的演化过程的综合影响的重要性提供了令人信服的时间证据。

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