Abstract: Amphibolites from the Grampian Moines of Scotland contain clinopyroxene-plagioclase symplectites and plagioclase-hornblende coronas around garnet. The clinopyroxene-plagioclase symplectites are interpreted as former omphacites. It is inferred that an eclogitic garnetomphacite-quartz assemblage once existed, but has since undergone partial reaction to an amphibolite facies hornblende-plagioclase assemblage. An early high-pressure metamorphic event occurred in parts of the Moine.
Mineralogical Magazine; June 1986 v. 50; no. 356; p. 217-221; DOI: 10.1180/minmag.1986.050.356.04
© 1986, The Mineralogical Society
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