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Petrogenesis and evolution of the Euganean magmatic complex, Veneto region, north-east Italy

Lorenzo Milani, Luigi Beccaluva and Massimo Coltorti
Petrogenesis and evolution of the Euganean magmatic complex, Veneto region, north-east Italy
European Journal of Mineralogy (April 1999) 11 (2): 379-399

Abstract

The Euganean magmatic complex consists of Upper Eocene to Lower Oligocene basic and differentiated volcanic and subvolcanic rocks. Three magmatic series are recognized: alkaline (alkali basalts, trachybasalts, trachyandesites, trachytes), transitional (basalts, trachybasalts, latites, quartz latites, quartz trachytes, rhyolites, alkali rhyolites) and quartz tholeiitic (basaltic andesites and dacites). Trace element patterns of the basic rocks are typical of anorogenic within-plate settings, showing affinities with OIB, as also shown by their isotopic signatures ( (super 87) Sr/ (super 86) Sr (sub i) 0.70319-0.70341, epsilon Nd (sub o) +4.6 to +5.6). Modelling of partial melting for the parental magmas of the three series requires metasomatized mantle sources, with amphibole involvement and melting at increasing degrees from alkali to quartz tholeiitic basalts. Low-P fractional crystallization processes played a dominant role in the generation of the differentiated rocks. Sr and Nd isotopic data suggest that wall-rock crustal contamination of the rising magmas and rock/sea-water interaction may have affected some intermediate and acid rocks.


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 11
Serial Issue: 2
Title: Petrogenesis and evolution of the Euganean magmatic complex, Veneto region, north-east Italy
Affiliation: Universita di Ferrara, Istituto di Mineralogia, Ferrara, Italy
Pages: 379-399
Published: 199904
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 81
Accession Number: 1999-035214
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. block diag., 3 tables, geol. sketch map
N44°47'60" - N46°40'60", E10°40'00" - E13°04'60"
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 199912
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