UID: The uranium isotope database
UID: The uranium isotope database
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DOI：
10.1016/j.chemgeo.2022.121221
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发表时间：
2022-11
期刊：
影响因子：
3.9
通讯作者：
Haoyu Li;F. Tissot
中科院分区：
文献类型：
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作者：
Haoyu Li;F. Tissot
铀(U)作为铀-铅和铅-铅放射性计时器的母体元素，是第一批被仔细测定其同位素组成的重元素之一。铀的长寿同位素(238U/235U)的比率一直被认为在20世纪末是不变的，此后在天然材料中的珍珠级到亚珍珠级的比率被证明是可变的。今天，铀同位素的研究已经在地球/宇宙年代学、海洋古氧化还原恢复、岩浆分异、环境修复和法医学研究等多个领域得到了应用。由于每年新报告的铀同位素数据数以千计，因此迫切需要一个全面的铀同位素数据库。在这里，我们介绍一个全球的、可更新的铀同位素数据库(UID)，它不仅包含迄今为止最广泛、内部一致的铀同位素数据集(来自320多篇论文的14,591个条目)，而且还包括来自原始出版物的所有其他样品数据，以及相关的元数据和样品信息，以便于进一步分析。UID是免费访问的，并将定期更新。所有数据都按照广泛使用的CRM-145标准进行了标准化，用于转换已发布数据的所有假设在论文和数据库本身中都有明确的详细说明。可以轻松地格式化和提交新数据，以便将其并入数据库。利用UID，我们为已认证的铀标准和地质标准提供了新的推荐δ238U值，并讨论了铀同位素研究的重要应用和未来方向。
As the parent element in the U-Pb and Pb-Pb radiochronometers, uranium (U) was one of the first heavy elements whose isotopic composition was carefully determined. Thought to be constant until the end of the 20thcentury, the ratio of the long-lived isotopes of U (238U/235U) has since been shown to be variable at the permil to sub-permil levels in natural materials. Today, the study of U isotopes has found applications in a variety of fields including geo/cosmochronology, oceanic paleoredox reconstruction, magmatic differentiation, environmental remediation, and forensic studies. With thousands of newly reported U isotopic data each year, a real need exists for a comprehensive U isotope database.Here, we introduce a global, updatable, U isotope database (UID), which not only contains the most expansive, internally consistent U isotopic dataset to date (14,591 entries from more than 320 papers), but also includes all other sample data from the original publications, as well as the relevant metadata and sample information to facilitate further analysis. The UID is freely accessible and will be updated regularly. All data are normalized to the widely-used CRM-145 standard, and all assumptions used to convert the published data are explicitly detailed in the paper and the database itself. New data can be easily formatted and submitted for incorporation into the database. Using the UID we provide new recommended δ238U values for certified U standards and geostandards and discuss important applications and future directions for U isotope studies.