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

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