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 contribution | An Inter-Laboratory Assessment of the Thorium Isotopic Composition of Synthetic and Rock Reference Materials |
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Original language | English |
Pages (from-to) | 65 - 91 |
Number of pages | 27 |
Journal | Geostandards and Geoanalytical Research |
Volume | 32 (1) |
DOIs | |
Publication status | Published - Mar 2008 |