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Resolving crystallisation ages of Archean mafic-ultramafic rocks using the Re-Os isotope system

Abstract:

Rhenium-Osmium (Re-Os) isotope and elemental data are presented for mafic-ultramafic rocks from the central region of the Lewisian Archean terrain in northwest Scotland. These results give a best estimate for the time of emplacement of the mafic-ultramafic bodies of 2686.7 ± 14.7 Myr (2σ). The initial 187Os/188Os isotope ratio of 0.10940 ± 0.00076 indicates that such material possessed a chondritic Os isotope composition, which suggests that these rocks were formed by direct melting of mantle...

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Published

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Institution:
University of Oxford
Department:
Oxford, MPLS, Earth Sciences
Role:
Author
Journal:
EARTH AND PLANETARY SCIENCE LETTERS
Volume:
179
Issue:
3-4
Pages:
453-467
Publication date:
2000-07-15
DOI:
ISSN:
0012-821X
URN:
uuid:b77f898d-1a9c-4f94-9c15-f6745be864b7
Source identifiers:
152051
Local pid:
pubs:152051

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