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Hydrous cordierite with isotopically light oxygen from granulites, Strangways Range, Central Australia

Published online by Cambridge University Press:  05 July 2018

Allan F. Wilson*
Affiliation:
Department of Geology and Mineralogy, University of Queensland, St. Lucia (Brisbane), Queensland, Australia, 4067

Summary

Two new analyses of magnesian cordierites (MgO ∼ 12 %) reveal about 1% by weight of H2O +, and one sample contains 15 × 10−5 cm3STP/gm argon, which is twenty times in excess of argon expected for its age. Host granulites contain unexpectedly light oxygen, and three cordierites have δ 18O values of 2·0, 2·8, and 3·1 ‰, respectively.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1978

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