HR: 0800h
AN: V51B-0562    [Abstracts]
TI: An Inter-Laboratory Assessment of the Th Isotopic Composition of Synthetic and Rock Standards.
AU: * Sims, K W
EM: ksims@whoi.edu
AF: Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States
AU: Gill, J
EM: jgill@pmc.ucsc.edu
AF: Earth and Planetary Sciences, University of California, Santa Cruz, CA 95604, United States
AU: Dosseto, A
EM: adosseto@els.mq.edu.au
AF: GEMOC, Macquarie University, Sydney, NSW 2109, Australia
AU: Hoffmann, D L
EM: Dirk.Hoffmann@bristol.ac.uk
AF: Bristol Isotope Group, University of Bristol, Bristol, BS8 1RJ, United Kingdom
AU: Lundstrom, C
EM: lundstro@uiuc.edu
AF: Dept of Geology, University of Illinois Urbana Champaign, Urbana, IL 61801, United States
AU: Williams, R
EM: williams141@llnl.gov
AF: Chemical Biology & Nuclear Science Division, Lawrence Livermore National Laboratory, Livermore, CA 94551, United States
AU: Ball, L
EM: lball@whoi.edu
AF: Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States
AU: Tollstrup, D
EM: darrent@pmc.ucsc.edu
AF: Earth and Planetary Sciences, University of California, Santa Cruz, CA 95604, United States
AU: Turner, S
EM: sturner@els.mq.edu.au
AF: GEMOC, Macquarie University, Sydney, NSW 2109, Australia
AU: Prytulak, J
EM: J.Prytulak@bristol.ac.uk
AF: Bristol Isotope Group, University of Bristol, Bristol, BS8 1RJ, United Kingdom
AU: Glessner, J
EM: lundstro@uiuc.edu
AF: Dept of Geology, University of Illinois Urbana Champaign, Urbana, IL 61801, United States
AU: Standish, J
EM: standish@fas.harvard.edu
AF: Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States
AU: Elliott, T R
EM: tim.elliott@bristol.ac.uk
AF: Bristol Isotope Group, University of Bristol, Bristol, BS8 1RJ, United Kingdom
AB: We present a concerted international effort to cross-calibrate five synthetic Th isotope standards (UCSC Th ‘A'; OU Th ‘U'; WUN; IRMM35; and IRMM 36), and six rock standards (UCSC TML, Icelandic ATHO; USGS BCR-2; USGS W2; USGS BHVO-2; LV18) using plasma ionization multi-collector inductively coupled mass spectrometry (PIMMS). We then compare our new values with the compilation of the literature mass spectrometric data for these standards and derive recommended ‘consensus' 230Th/232Th values for each. We also present isotope dilution U and Th concentration data for four rock standards (UCSC TML, Icelandic ATHO; USGS BCR-2; USGS W2).
DE: 8494 Instruments and techniques
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2007 Fall Meeting