Liebmann J, Ware B, Mole D R, Kirkland C L, Fraser G, Waltenberg K, Bodorkos S, Huston D L, Evans N J, McDonald B J, Rankenburg K, Datta P, Tessalina S
Timescales of Mineral Systems Group, School of Earth and Planetary Sciences, Curtin University, Perth, WA, 6102, Australia.
John de Laeter Centre, Curtin University, Perth, WA, 6102, Australia.
Sci Data. 2024 Nov 12;11(1):1222. doi: 10.1038/s41597-024-03996-5.
Lead isotopes are a powerful geochemical tracer and a popular tool applied across a broad range of scientific fields, e.g., earth sciences, archaeology, and forensic sciences. Here we present a Pb isotope dataset collected from 232 igneous samples, spanning a ca. 2.3 million km area in southeastern Australia, and over 3 billion years of Earth history. This contribution provides a range of isotopic maps showing the spatial variability of Pb isotopes (Pb/Pb, Pb/Pb, and Pb/Pb), magma source U/Pb and Th/U, and model ages. The samples selected for this study encompass U- and Th-poor media (i.e., K-feldspar), and U- and Th-bearing sampling media (i.e., whole-rock), providing a temporally and spatially resolved image of U and Th distribution in the crust, and their influence on crustal Pb through radiogenic ingrowth. This dataset has the potential to benefit a wide variety of different disciplines and is an important resource for addressing earth science questions ranging from unravelling crustal differentiation and architecture, through tracing magma source U- and Th-enrichment, to mineral deposit genesis.
铅同位素是一种强大的地球化学示踪剂，也是一种广泛应用于众多科学领域的常用工具，如地球科学、考古学和法医学等。在此，我们展示了一个从232个火成岩样本中收集的铅同位素数据集，这些样本分布在澳大利亚东南部约230万平方公里的区域，跨越了超过30亿年的地球历史。本研究成果提供了一系列同位素地图，展示了铅同位素（²⁰⁶Pb/²⁰⁴Pb、²⁰⁷Pb/²⁰⁴Pb和²⁰⁸Pb/²⁰⁴Pb）的空间变异性、岩浆源U/Pb和Th/U以及模式年龄。本研究选取的样本包括贫铀和钍的介质（即钾长石）以及含铀和钍的采样介质（即全岩），提供了地壳中铀和钍分布的时间和空间分辨图像，以及它们通过放射性增长对地壳铅的影响。该数据集有潜力使众多不同学科受益，是解决地球科学问题的重要资源，这些问题涵盖从揭示地壳分异和结构，到追踪岩浆源铀和钍富集，再到矿床成因等各个方面。
