gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1987.051.362.11 Mineralogy Evidence for Differences in Growth Rate Among Garnets in Pelitic Schists from Northern Sutherland, Scotland Finlay C. A. Pollution Control Group, Department of Chemical Engineering, University of Natal, King George V Avenue, Durban 4001, South Africa Kerr A. Department of Geology and Applied Geology, University of Natal, King George V Avenue, Durban 4001, South Africa 10 1987 51 62 569 576 13 1 1986 8 8 1986 Copyright © 1987, The Mineralogical Society 1987 Abstract

MnO zoning profiles for various sizes of garnets from two pelitic schists were examined. The data from garnets of specimen A are consistent with a constant growth law, while the compositional-crystal size relationships of garnets from specimen B are best explained by heterogeneous growth rates.

 Keywords garnet growth rate pelitic schists Sutherland Scotland