Amb motiu del tancament d'estiu, la validació de documents es reprendrà a partir del 28 d'agost de 2026. Disculpeu les molèsties.
Con motivo del cierre de verano, la validación de documentos se reanudará a partir del 28 de agosto de 2026. Disculpad las molestias
Due to the summer closure, document validation will resume starting August 28, 2026. We apologize for any inconvenience.

Files

651045.pdf (3.22 MB)

Document type

Article

Version

Published version

Publication date

1999-06-01

All rights reserved

Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/126259

Uvarovite in podiform chromitite; the Moa-Baracoa ophiolitic massif, Cuba

Journal Title

Authors

Director/Tutor

Journal ISSN

Volume Title

Related resource

Abstract

The chromitite pods of the Moa-Baracoa massif, in the eastern ophiolitic belt of Cuba, contain pre-existing gabbro sills. This association is affected by two processes of hydrothermal alteration. The chromitites and the hosting dunites and harzburgites are affected first by regional serpentinization; a second alteration, represented by chloritization accompanied with formation of ferrian chromite, is mainly located in the pods and their immediate vicinity. The altered chromitite pods and enclosed gabbro sills iue cross cut by millimeter-wide veins. The vein filling consists of a sequence of clinochlore, uvarovite, chromian clinochlore, rutile, titanite and calcite. Uvarovite also occurs in the vicinity of veins Uvarovite is concentrically zoned, covering compositions in the uvarovite-grossular solid solution series between Uva17 and Uvae:; the andradite component is very low. These compositions suggest a complete miscibility along the grossular-uvarovite join at relatively low temperature. On the basis of the mineral sequence and mineral chemistry (major and trace elements), the uvarovite crystals, as well as the vein assemblage, formed by a low-temperature leaching, Ca probably from the gabbro sills, and Cr and Al from the chromite dunng the formation of ferrian chromite Cr and A1 would have been mobile only at the scale of a pod during this process.

Subject

Mineralogia, Cuba

Subject (English)

Mineralogy, Cuba

Citation

Collections

Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)

Citation

PROENZA FERNÁNDEZ, Joaquín Antonio, SOLÉ, Jesús and MELGAREJO I DRAPER, Joan-Carles. Uvarovite in podiform chromitite; the Moa-Baracoa ophiolitic massif, Cuba. Canadian Mineralogist. 1999. Vol. 37, num. 679-690. ISSN 0008-4476. [consulted: 12 of August of 2026]. Available at: https://hdl.handle.net/2445/126259

Export metadata

JSON - METS

Share record