Sr stable isotope composition of Earth, the Moon, Mars, Vesta and meteorites.pdf

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Sr stable isotope composition of Earth, the Moon, Mars, Vesta and meteorites.pdf

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Sr stable isotope composition of Earth, the Moon, Mars, Vesta and meteorites

Earth and Planetary Science Letters 300 (2010) 359–366 Contents lists available at ScienceDirect Earth and Planetary Science Letters j ourna l homepage: www.e lsev ie / locate /eps lSr stable isotope composition of Earth, the Moon, Mars, Vesta and meteorites Frédéric Moynier a,b,?, Arnaud Agranier c, Dominik C. Hezel d, Audrey Bouvier e a Department of Earth and Planetary Sciences, Washington University in St Louis, One Brookings Drive, St Louis, MO 63130, USA b McDonnell Center for Space Sciences, Washington University in St Louis, One Brookings Drive, St Louis, MO 63130, USA c Institut Universitaire Européen de la Mer, Université de Bretagne Occidentale, Domaines Océaniques, UMR 6538, Place Nicolas Copernic 29820 Plouzané, France d IARC, Department of Mineralogy, Natural History Museum, Cromwell Road, London, SW7 5BD, UK e Arizona State University, School of Earth and Space Exploration, Tempe, AZ 85287-1404 USA? Corresponding author. Department of Earth and Pl University in St Louis, One Brookings Drive, St Louis, MO E-mail address: moynier@ (F. Moyni 0012-821X/$ – see front matter ? 2010 Elsevier B.V. A doi:10.1016/j.epsl.2010.10.017a b s t r a c ta r t i c l e i n f oArticle history: Received 6 August 2010 Received in revised form 5 October 2010 Accepted 12 October 2010 Available online 5 November 2010 Editor: R.W. Carlson Keywords: meteorites Sr isotopes MC-ICP-MS cosmochemistryHigh-precision stable Sr isotopic variations (88Sr/86Sr) are reported in a variety of terrestrial samples, martian and lunar meteorites, HED, undifferentiated primitive meteorites, chondrules and refractory inclusions. Almost all the whole-rock samples are isotopically indistinguishable at a 50 parts per million (ppm) level. The exceptions are CV and CO chondrites which are isotopically light and for which we believe that their isotopic composition is controlled by the proportion of refractory material. Five separated chondrules and one refractory inclusion from Allende are isotopically