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An unusual clinopyroxene with complex lamellar intergrowths from an eclogite in the Sunndal-Grubse ultramafic mass, Almklovdalen, Nordfjord, Norway

Published online by Cambridge University Press:  05 July 2018

M. A. Lappin
M. A. Lappin*
Affiliation:
Department of Geology and Mineralogy, University of Aberdeen, Marischal College, Aberdeen, AB9 IAS
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Summary

Clinopyroxene crystals with complex lamellar intergrowths of orthopyroxene and garnet are described. The orthopyroxene lamellae are irrationally orientated within the clinopyroxene host although the optical relationships of these minerals are consistent with (100) exsolution in clinopyroxene. The intergrowth is nevertheless considered to be the result of exsolution processes. Possible modes of origin are reviewed together with the general significance of exsolved pyroxenes in eclogite- and granulite-facies associations.

Type
Research Article
Information
Mineralogical Magazine , Volume 39 , Issue 303 , September 1973 , pp. 313 - 320
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1973

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