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Rhyodacite glass in Réunion basalt

Published online by Cambridge University Press:  05 July 2018

B. G. J. Upton  and
W. J. Wadsworth
B. G. J. Upton
Affiliation:
Grant Institute of Geology, University of Edinburgh
W. J. Wadsworth
Affiliation:
Department of Geology, University of Manchester
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Summary

The local development of strongly oxidizing conditions during crystallization of a recent basalt lava lake on Piton de la Fournaise, Réunion, led to the production of approximately 15 % residual rhyodacite liquid. This was segregated into the vesicle cavities as the lava solidified, and congealed as a glass containing microlites of feldspar, clinopyroxene, and hematite. The rhyodacite is compared chemically with the residual glasses recorded from other basaltic and doleritic occurrences, and with the Mauna Kuwale rhyodacite of Oahu.

Type
Research Article
Information
Mineralogical Magazine , Volume 38 , Issue 294 , June 1971 , pp. 152 - 159
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2013

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