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Trace element distribution in eclogites and their clinopyroxene/garnet pair; a case study from Soazza (Switzerland)

Rosangela Bocchio, Luisa De Capitani, Luisa Ottolini and Fiorenza Cella
Trace element distribution in eclogites and their clinopyroxene/garnet pair; a case study from Soazza (Switzerland)
European Journal of Mineralogy (February 2000) 12 (1): 147-161

Abstract

REE abundances have been determined in six samples of metabasites from the Pennidic Adula nappe in the Soazza area, Mesolcina Valley, Switzerland, ranging from eclogite to symplectitic garnet amphibolite to epidote amphibolite. The REE patterns do not vary significantly and indicate a common origin for these rocks as 'normal' MORB. The two main eclogitic phases, clinopyroxene and garnet, have been analysed for REE and other trace elements. The incorporation of these elements in structural sites of these two minerals is in accordance with an evaluation of site geometry, ionic radius and charge balance, and is therefore dependent on the major element composition of the host minerals. The change in clinopyroxene/garnet partition coefficients for HREE is particularly associated with the T of equilibration of the pair.


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 12
Serial Issue: 1
Title: Trace element distribution in eclogites and their clinopyroxene/garnet pair; a case study from Soazza (Switzerland)
Affiliation: Universita di Milano, Dipartimento di Scienze della Terra, Milan, Italy
Pages: 147-161
Published: 200002
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 57
Accession Number: 2000-027050
Categories: Geochemistry of rocks, soils, and sedimentsIgneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables
N45°49'60" - N46°10'00", E07°00'00" - E08°15'00"
N45°45'00" - N47°45'00", E05°49'60" - E10°30'00"
Secondary Affiliation: Centro di Studio per la Cristallochimica e la Cristallografia, ITA, Italy
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 200009
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