An Inter-Laboratory Assessment of the Thorium Isotopic Composition of Synthetic and Rock Reference Materials

KWW Sims, JB Gill, A Dosseto, DL Hoffmann, CC Lundstrom, RW Williams, L Ball, D Tollstrup, S Turner, J Prytulak, JJG Glessner, JJ Standish, TR Elliott

Research output: Contribution to journalArticle (Academic Journal)peer-review

122 Citations (Scopus)

Abstract

We present a concerted international effort to cross-calibrate five synthetic Th isotope reference materials (UCSC Th "A", OU Th "U", WUN, IRMM-35 and IRMM-36), and six rock reference materials (UCSC TML, Icelandic ATHO, USGS BCR-2, USGS W-2, USGS BHVO-2, LV18) using multi-collector inductively coupled plasma-mass spectrometry (MC-ICP-MS). We then compare our new values with a compilation of literature mass spectrometric data for these reference materials and derive recommended "consensus" 230Th/232Th values for each. We also present isotope dilution U and Th concentration data for four rock reference materials (UCSC TML, Icelandic ATHO, USGS BCR-2, USGS W-2).
Translated title of the contributionAn Inter-Laboratory Assessment of the Thorium Isotopic Composition of Synthetic and Rock Reference Materials
Original languageEnglish
Pages (from-to)65 - 91
Number of pages27
JournalGeostandards and Geoanalytical Research
Volume32 (1)
DOIs
Publication statusPublished - Mar 2008

Bibliographical note

Publisher: Blackwell

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