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Sector-zoned kaersutite in camptonites from Morocco

Published online by Cambridge University Press:  05 July 2018

Abdelkader Mokhtari  and
Danielle Velde
Abdelkader Mokhtari
Affiliation:
Laboratoire de Petrologie Minéralogique, Université P. et M. Curie, E3 Tour 26, 4 place Jussieu 75252, Paris Cedex 5, France
Danielle Velde
Affiliation:
Laboratoire de Petrologie Minéralogique, Université P. et M. Curie, E3 Tour 26, 4 place Jussieu 75252, Paris Cedex 5, France
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Abstract

Camptonites from the Taourirt region of Morocco contain kaersutite crystals that exhibit clear sector zoning. The electron microprobe reveals systematic variations between sectors, with preferential enrichment of Mg and Si in sector (011) and higher values for Fe, Ti and Al in sectors (110) or (100). These differences are similar to those recorded in clinopyroxenes with hour-glass zoning where this type of crystallization has been known for more than a century.

Keywords

amphibolekaersutitesector zoningMorocco
Type
Mineralogy
Information
Mineralogical Magazine , Volume 51 , Issue 359 , March 1987 , pp. 151 - 156
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1987

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