On the Preferred Crystallographic Orientation of Garnet in Some Metamorphic Rocks

Derek Powell
Department of Geology, Bedford College, University of London

Summary: A study of inclusions within garnet porphyroblasts demonstrates that planar inclusion bands and trails lie sub-parallel to one of the {110} planes of the host. The inclusions provide a relic of a rock fabric that existed before the growth of garnet. It is suggested that this fabric has determined the crystallographic orientation of garnet and may have arisen by the nucleation and epitaxial growth of garnet within or upon the mica lattice.

Mineralogical Magazine; December 1966 v. 36; no. 276; p. 1094-1109; DOI: 10.1180/minmag.1966.036.276.05
© 1966, The Mineralogical Society
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