洞穴鸟粪矿床中210Pb和137Cs活动性的地质年代意义

IF 1.3 4区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

International Journal of Speleology Pub Date : 2021-08-01 DOI:10.5038/1827-806x.50.3.2391

D. McFarlane, J. Lundberg

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引用次数: 4

摘要

最近一些关于蝙蝠鸟粪序列的古环境和历史环境解释的出版物依赖于210Pb和137Cs的分布来建立年龄深度模型，即使这些模型与序列下部的放射性碳模型不一致。在这里，我们提供了现场和实验室证据，证明铅和铯在分解蝙蝠粪沉积物中的不可预测的流动性。我们建议，只有在得到可靠的放射性碳年龄深度模型的独立支持时，才能使用基于210Pb和137Cs的蝙蝠粪沉积物年代表。

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Geochronological implications of 210Pb and 137Cs mobility in cave guano deposits

Some recent publications on the paleo- and historical environmental interpretation of bat guano sequences have relied on 210Pb and 137Cs distribution to establish age-depth models, even when these are at odds with radiocarbon models in the lower parts of the sequence. Here, we present both field and laboratory evidence for the unpredictable mobility of lead and cesium in decomposing bat guano deposits. We suggest that 210Pb- and 137Cs-based chronologies of bat guano deposits should only be used when independently supported, for example, by a robust radiocarbon age-depth model.

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来源期刊

International Journal of Speleology 地学-地球科学综合

CiteScore

3.10

自引率

23.10%

发文量

审稿时长

>12 weeks

期刊介绍： The International Journal of Speleology has the aim to get cave and karst science known to an increasing number of scientists and scholars. The journal therefore offers the opportunity to all scientists working in and on karst to publish their original research articles or their review papers in an open access, high quality peer reviewed scientific journal at no cost. The journal offers the authors online first, open access, a free PDF of their article, and a wide range of abstracting and indexing services.