Articles | Volume 3, issue 1
Geochronology, 3, 103–122, 2021

Special issue: In situ carbonate U–Pb geochronology

Geochronology, 3, 103–122, 2021

Research article 16 Feb 2021

Research article | 16 Feb 2021

Tools for uranium characterization in carbonate samples: case studies of natural U–Pb geochronology reference materials

E. Troy Rasbury et al.

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Cited articles

Allwood, A. C., Rosing, M. T., Flannery, D. T., Hurowitz, J. A., and Heirwegh, C. M.: Reassessing evidence of life in 3,700-million-year-old rocks of Greenland, Nature, 563, 241–244,, 2018. 
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Banner, J. L. and Hanson, G. N.: Calculation of simultaneous isotopic and trace element variations during water-rock interaction with applications to carbonate diagenesis, Geochim. Cosmochim. Ac., 54, 3123–3137,, 1990. 
Barnaby, R. and Rimstidt, J.: Redox conditions of calcite cementation interpreted from Mn-contents and Fe-contents of authigenic calcites, Geol. Soc. Am. Bull., 101, 795–804,<0795:RCOCCI>2.3.CO;2, 1989. 
Short summary
We characterize three natural carbonate samples with elevated uranium/lead (U/Pb) ratios to demonstrate techniques improving the understanding of U incorporation in carbonates for U/Pb dating. With the rapidly accelerating application of laser ablation analyses, there is a great need for well-characterized reference materials that can serve multiple functions. Strontium (Sr) isotope analyses and U XANES demonstrate that these samples could be used as reference materials.