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Fractionation of oxygen and iron isotopes by partial melting processes: Implications for the interpretation of stable isotope signatures in mafic rocks

Abstract:

Recycling of oceanic crust into the deep mantle via subduction is a widely accepted mechanism for creating compositional heterogeneity in the upper mantle and for explaining the distinct geochemistry of mantle plumes. The oxygen isotope ratios (δ18O) of some ocean island basalts (OIB) span values both above and below that of unmetasomatised upper mantle (5.5 ± 0.4‰) and provide support for this hypothesis, as it is widely assumed that most variations in δ18O are produced by near-surface low-t...

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Publication status:
Published

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Publisher copy:
10.1016/j.epsl.2009.04.011

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Journal:
EARTH AND PLANETARY SCIENCE LETTERS
Volume:
283
Issue:
1-4
Pages:
156-166
Publication date:
2009-06-15
DOI:
ISSN:
0012-821X
Source identifiers:
82964
Language:
English
Keywords:
Pubs id:
pubs:82964
UUID:
uuid:f461d28f-8020-4790-9541-776f20f19764
Local pid:
pubs:82964
Deposit date:
2012-12-19

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