Uranium and Thorium Concentration and Isotopic Composition in Five Glass (BHVO‐2G,BCR‐2G,NKT‐1G,T1‐G,ATHO‐G) and Two Powder (BHVO‐2, BCR‐2) Reference Materials |
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| Authors: | Kathryn A Matthews Michael T Murrell Steven J Goldstein Andrew J Nunn Deborah E Norman |
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| Institution: | Nuclear and Radiochemistry Group, Chemistry Division, Los Alamos National Laboratory, MS J514, Los Alamos, NM 87545, USA |
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| Abstract: | Here we report uranium and thorium isotopic ratios and elemental concentrations measured in solid reference materials from the USGS (BHVO‐2G, BCR‐2G, NKT‐1G), as well as those from the MPI‐DING series (T1‐G, ATHO‐G). Specifically created for microanalysis, these naturally‐sourced glasses were fused from rock powders. They cover a range of compositions, elemental concentrations and expected isotopic ratios. The U‐Th isotopic ratios of two powdered source materials (BCR‐2, BHVO‐2) were also characterised. These new measurements via multi‐collector thermal ionisation mass spectrometry and multi‐collector inductively coupled plasma‐mass spectrometry can now be used to assess the relative performance of techniques and facilitate comparison of U‐Th data amongst laboratories in the geoscience community for in situ and bulk analyses. |
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| Keywords: | glass reference materials uranium thorium MPI‐DING LA‐ICP‐MS SIMS U‐series microanalyse verre de ré fé rence uranium thorium MPI‐DING LA‐ICP‐MS SIMS U‐sé ries |
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