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Serpentinites from central Cuba; petrology and HRTEM study

Anne-Line Auzende, Bertrand Devouard, Stephane Guillot, Isabelle Daniel, Alain Baronnet and Jean-Marc Lardeaux
Serpentinites from central Cuba; petrology and HRTEM study
European Journal of Mineralogy (October 2002) 14 (5): 905-914


Serpentinites from the eclogitic unit of the Escambray Massif and from the Zaza zone are associated with the metabasites in lenses embedded in a metasediment matrix (Escambray) or from the matrix that embeds the metabasites (Zaza zone). Field and petrographic evidence suggest that serpentinites and associated metabasites underwent the same metamorphic history. Serpentinites from Escambray have preserved high-grade structures. In the Zaza zone, most of the serpentinites only underwent low-grade metamorphism and a sample that underwent eclogitic conditions is strongly retrogressed. Low-grade serpentinites show pseudomorphic textures in thin section, a mixture of chrysotile, poorly crystallized serpentine and minor lizardite. High-grade samples are mostly antigorite, with minor chrysotile. TEM shows that antigorite has few structural defects, whereas the highly retrogressed serpentinites have stacking faults and modulation dislocations. It is suggested that a record of high metamorphic grade in matrix antigorite is best characterized by the elimination of structural defects.

ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 14
Serial Issue: 5
Title: Serpentinites from central Cuba; petrology and HRTEM study
Affiliation: OPGC, Labratoire "Magmas et Volcans", Clermont-Ferrand, France
Pages: 905-914
Published: 200210
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 43
Accession Number: 2002-071652
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. table, geol. sketch map
N19°49'60" - N23°15'00", W85°00'00" - W74°00'00"
Secondary Affiliation: ENSL, FRA, FranceCentre de Recherche sur les Mecanismes de la Croissance Cristalline, 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: 200222
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