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Cosmic-ray production of tungsten isotopes in lunar samples and meteorites and its implications for Hf-W cosmochemistry

Abstract:

Excesses and deficiencies in 182W in meteorites and lunar samples relative to the terrestrial 182W atomic abundance have been assigned to the decay of 182Hf (t(1/2)=9 Ma) and have been used to date metal-silicate fractionation events in the early solar system. Because the effects are very small, production and burn-out of tungsten isotopes by cosmic ray interactions are a concern in such studies. Masarik [J. Masarik, Contribution of neutron-capture reactions to observed tungsten isotopic rati...

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Publication status:
Published

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Institution:
University of Oxford
Department:
Oxford, MPLS, Earth Sciences
Journal:
EARTH AND PLANETARY SCIENCE LETTERS
Volume:
175
Issue:
1-2
Pages:
1-12
Publication date:
2000-01-30
DOI:
ISSN:
0012-821X
URN:
uuid:4029b971-d3df-45b6-b45a-5b0a208094da
Source identifiers:
152057
Local pid:
pubs:152057

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