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GEOREF RECORD

Petrology of microdiamond-bearing schists from the Torrox Unit, Betic Cordillera, Spain

Maria Dolores Ruiz Cruz and Carlos Sanz de Galdeano
Petrology of microdiamond-bearing schists from the Torrox Unit, Betic Cordillera, Spain
European Journal of Mineralogy (February 2014) 25 (6): 919-933

Abstract

Microdiamond inclusions in garnet have been identified in pre-Triassic schists of unknown age from the Torrox unit in the Alpujarride complex, Internal Zone of the Betic Cordillera, Spain. Prior to this, ultrahigh-pressure (UHP) phases have been identified in granulites and gneisses associated with peridotites in the western zone of the Cordillera and in the NW of the Rif Mountains. This new finding reveals that the UHP metamorphism affected a crustal sequence notably thicker than previously assumed. In contrast with granulites and gneisses, in which only the UHP event and the local thermal effect of the peridotite emplacement have been identified, schists record a complex poly-metamorphic history, which contrasts with previous interpretations based on an exclusively Alpine metamorphic scenario. In addition to the UHP event, the schists show clear signals of two later metamorphic events, recorded by several stages of garnet growth, by staurolite-andalusite parageneses, and by matrix micas. In this study the metamorphic sequence is established, but the timing of the different metamorphic events remains uncertain.


ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 25
Serial Issue: 6
Title: Petrology of microdiamond-bearing schists from the Torrox Unit, Betic Cordillera, Spain
Affiliation: Universidad de Malaga, Departamento de Quimica Inorganica, Cristalografia y Mineralogia, Malaga, Spain
Pages: 919-933
Published: 201402
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Germany
References: 58
Accession Number: 2014-028552
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, geol. sketch maps
N36°43'00" - N36°49'60", W04°07'60" - W03°55'60"
Secondary Affiliation: Universidad de Granada, ESP, Spain
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Schweizerbart'sche Verlagsbuchhandlung. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201418
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