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An occurrence of ilvaite layers in the Cinco Villas metasomatic rocks, Western Pyrenees (Spain)

Published online by Cambridge University Press:  05 July 2018

A. Pesquera  and
F. Velasco
A. Pesquera
Affiliation:
Department of Mineralogy, University of the Basque Country, PO Box 644, Bilbao, Spain
F. Velasco
Affiliation:
Department of Mineralogy, University of the Basque Country, PO Box 644, Bilbao, Spain
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Abstract

In the Artikutza area, near the contact with the southern Aya granite, skarns containing hedenbergite, grandite, epidote, quartz, calcite, actinolite, idocrase and magnetite occur and have been found to contain ilvaite layers. This is the second reported occurrence of ilvaite in Spain; spectral reflectances, colour values. Vickers hardness numbers and chemical composition are given. The monomineralic ilvaite lens intercalation developed by hydrothermal alteration of hedenbergite in a second stage of skarn formation.

Keywords

ilvaiteskarnsreflectivityAya graniteSpain
Type
Silicate mineralogy
Information
Mineralogical Magazine , Volume 50 , Issue 358 , December 1986 , pp. 653 - 656
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1986

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