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Archean granitoids; classification, petrology, geochemistry and origin

Jean-Francois Moyen
Archean granitoids; classification, petrology, geochemistry and origin (in Archean granitoids of India; windows into early Earth tectonics, S. Dey (editor) and Jean-Francois Moyen (editor))
Special Publication - Geological Society of London (April 2019) 489 (1): 15-49

Abstract

This paper describes the petrology, geochemistry and petrogenesis of Archean granitoids. Archean granites define a continuum of compositions between several end members: (i) magmas that originated by partial melting of a range of crustal sources, from amphibolites to metasediments ('C-type' granitoids); and (ii) magmas that formed by partial melting of an enriched mantle source, the most common agent of enrichment being felsic (TTG) melts. Differences in the degree of metasomatism results in different primitive liquids for these 'M-type' granitoids. Mixed sources, differentiation and interactions between different melts resulted in a continuous range of compositions, defined by variable proportions of each end member. During the Archean, evolved crustal sources (sediments or felsic crust) and metasomatized mantle sources become increasingly more important, mirroring the progressive maturation of crustal segments and the stabilization of the global tectonic system.


ISSN: 0305-8719
Coden: GSLSBW
Serial Title: Special Publication - Geological Society of London
Serial Volume: 489
Serial Issue: 1
Title: Archean granitoids; classification, petrology, geochemistry and origin
Title: Archean granitoids of India; windows into early Earth tectonics
Author(s): Moyen, Jean-Francois
Author(s): Dey, S.editor
Author(s): Moyen, Jean-Francoiseditor
Affiliation: Universite de Lyon, Laboratoire Magmas et Volcans, Saint Etienne, France
Pages: 15-49
Published: 20190401
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 211
Accession Number: 2019-084448
Categories: Isotope geochemistryIgneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables
Source Note: Online First
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2021, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 201945
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