English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/3209
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Origine des grenats des roches calco-alcalines du Sud-Est de l'Espagne

AuthorsLópez Ruiz, J. ; Rodríguez Badiola, Eduardo ; García Cacho, L.
KeywordsCalc-alkaline rocks
dacites - rhyodacites
garnets almandine
SE Spain
Issue DateSep-1977
PublisherSpringer
CitationBulletin of Volcanology Volume 40, Number 3 1-12
AbstractTertiary dacites and rhyodacites in SE Spain contain garnets, both as phenocrysts in the lavas and within their enclosed metamorphic xenoliths. Microprobe analyses show that calc-alkaline and metamorphic rocks garnets are quite similar in composition (almandine-rich). However, the zoning patterns displayed in the two types of garnets differ. Garnets included in lavas show normal zoning (or a slight enrichment of Mn at the borders), while garnets in xenoliths have Mn-enriched rims or reverse zoning. The differences in zonation, as well as in petrographic features, indicate that the garnets in volcanic rocks crystallized directly from the calc-alkaline magma at an early stage of its crystallization. On the other hand, the uniform composition of dacitic and rhyodacitic garnets, as well as its low pyrope and grossular content, suggest that the conditions in which the garnets crystallized were rapidly exceeded.
DescriptionLos auteurs remercient le docteur V. ARAÑA de l'Institut Lucas Mallada (C.S.I.C.) la lecture critique du manuscrit. Le docteur F. DIMANCHE de l'Université de Liége a réalisé la traduction en français du travail.
Publisher version (URL)http://dx.doi.org/10.1007/BF02596996
URIhttp://hdl.handle.net/10261/3209
DOI10.1007/BF02596996
ISSN0366-483X
Appears in Collections:(MNCN) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work
 


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.