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GEOREF RECORD

Granitic pegmatites as reflections of their sources

Petr Cerny, David London and Milan Novak
Granitic pegmatites as reflections of their sources
Elements (August 2012) 8 (4): 289-294

Abstract

Pegmatites accentuate the trace element signatures of their granitic sources. Through that signature, the origin of pegmatites can commonly be ascribed to granites whose own source characteristics are known and distinctive. Interactions with host rocks that might modify the composition of pegmatites are limited by the rapid cooling and low heat content of pegmatite-forming magmas. The trace element signatures of most pegmatites clearly align with those of S-type (sedimentary source, mostly postcollisional tectonic environment) and A-type (anorogenic environment, lower continental crust + or - mantle source) granites. Pegmatites are not commonly associated with I-type (igneous source) granites. The distinction between granites that spawn pegmatites and those that do not appears to depend on the presence or absence, respectively, of fluxing components, such as B, P, and F, in addition to H (sub 2) O, at the source.


ISSN: 1811-5209
Serial Title: Elements
Serial Volume: 8
Serial Issue: 4
Title: Granitic pegmatites as reflections of their sources
Affiliation: University of Manitoba, Department of Geological Sciences, Winnipeg, MB, Canada
Pages: 289-294
Published: 201208
Text Language: English
Publisher: Mineralogical Society of America and Mineralogical Society of Great Britain and Ireland and Mineralogical Association of Canada and Geochemical Society and Clay Minerals Society, International
References: 34
Accession Number: 2012-090444
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table
Secondary Affiliation: University of Oklahoma, USA, United StatesMasaryk University, CZE, Czech Republic
Country of Publication: International
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America
Update Code: 201247
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