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Phonolitic origin of Roque Nublo ignimbrites of Gran Canaria (Canary Islands, Spain) from clinopyroxene melt inclusion studies

Jose Mangas, Francisco Jose Perez-Torrado, Dominique Massare and Robert Clocchiatti
Phonolitic origin of Roque Nublo ignimbrites of Gran Canaria (Canary Islands, Spain) from clinopyroxene melt inclusion studies
European Journal of Mineralogy (February 1993) 5 (1): 97-106

Abstract

The Roque Nublo non-welded Pliocene (5-3.5 m.y.) ignimbrites are characteristic deposits of the second magmatic cycle on Gran Canaria. They are very heterogeneous with 30-50 vol.% lithic fragments, 15-20% mildly vesiculated pumice, 5-10% phenocrysts and 30-40% ash matrix. A melt inclusion study on clinopyroxenes from these ignimbrites indicates that the original melt prior to the ignimbritic eruptions was phonolitic in character. Homogenization on these melt inclusions (without P corrections) gave values of 1050 +- 15 and 1150 +- 20 degrees C.


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 5
Serial Issue: 1
Title: Phonolitic origin of Roque Nublo ignimbrites of Gran Canaria (Canary Islands, Spain) from clinopyroxene melt inclusion studies
Affiliation: Universidad de Las Palmas de Gran Canaria, Departamento de Geologia, Facultad de Ciencias del Mar, Las Palmas, Spain
Pages: 97-106
Published: 199302
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 20
Accession Number: 1993-003539
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Report of meeting, ECROFI, held in Florence, Italy, April 10-12, 1991
Illustration Description: illus. incl. 4 tables, geol. sketch maps
N27°43'60" - N28°10'00", W15°49'60" - W15°22'00"
N36°00'00" - N43°45'00", W09°30'00" - E04°30'00"
Secondary Affiliation: CEN Saclay, FRA, France
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 1993
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