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Tungsten isotopic compositions of iron meteorites: Chronological constraints vs. cosmogenic effects

Abstract:

High-precision W isotopic compositions are presented for 35 iron meteorites from 7 magmatic groups (IC, IIAB, IID, IIIAB, IIIF, IVA, and IVB) and 3 non-magmatic groups (IAB, IIICD, and IIE). Small but resolvable isotopic variations are present both within and between iron meteorite groups. Variations in the 182W/184W ratio reflect either time intervals of metal-silicate differentiation, or result from the burnout of W isotopes caused by a prolonged exposure to galactic cosmic rays. Calculated...

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Publication status:
Published

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Publisher copy:
10.1016/j.epsl.2005.11.048

Authors


Markowski, A More by this author
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Institution:
University of Oxford
Department:
Oxford, MPLS, Earth Sciences
Journal:
EARTH AND PLANETARY SCIENCE LETTERS
Volume:
242
Issue:
1-2
Pages:
1-15
Publication date:
2006-02-15
DOI:
ISSN:
0012-821X
URN:
uuid:f216c0fc-2aa2-4f74-8cdc-e88d4eb25964
Source identifiers:
82605
Local pid:
pubs:82605

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