gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1990.054.376.15 Short Communications Complex Sector Zonation in Ankerite: Geochemical Controls on Crystal Morphology and Intersector Element Partitioning Searl Alison School of Earth Sciences, University of Birmingham, Birmingham, B15 2TT 9 1990 54 376 501 507 11 9 1989 18 1 1990 Copyright © 1990, The Mineralogical Society 1990 ankerite sector zonation carbonate crystal morphology