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Archean melt inclusions in zircon from quartzite and granitic orthogneiss from South Africa; magma compositions and probable sources of protoliths

Sergey V. Chupin, Vladimir P. Chupin, Jay M. Barton and Erica S. Barton
Archean melt inclusions in zircon from quartzite and granitic orthogneiss from South Africa; magma compositions and probable sources of protoliths (in ECROFI XIV (European Current Research on Fluid Inclusions) symposium, Michel Cathelineau and Jean Dubessy)
European Journal of Mineralogy (December 1998) 10 (6): 1241-1251

Abstract

Results are presented of analyses of melt inclusions in >3.0 Ga zircon grains from three lithologies in South Africa: the Orange Grove Quartzite of the Witwatersrand Supergroup, quartzite of the Beit Bridge Group and the S-type Singelele orthogneiss, the latter both of the Central Zone of the Limpopo Belt. In each case, the presence of melt inclusions indicates that the zircon is magmatic in origin. No melt inclusions occur in metamorphic overgrowths in some grains. Melt inclusions in detrital zircon grains from the two quartzite units indicate that both tonalitic-trondhjemitic and granitic magmas were being emplaced in the source areas at about 3.2 Ga. Granitic magmatism at that time is among the earliest recognized in southern Africa. Inclusions in zircon grains from the Singelele orthogneiss are compositionally similar to the host rock, showing that they are a magmatic phase rather than a xenocrystic phase.


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 10
Serial Issue: 6
Title: Archean melt inclusions in zircon from quartzite and granitic orthogneiss from South Africa; magma compositions and probable sources of protoliths
Title: ECROFI XIV (European Current Research on Fluid Inclusions) symposium
Author(s): Chupin, Sergey V.Chupin, Vladimir P.Barton, Jay M., Jr.Barton, Erica S.
Author(s): Cathelineau, Michel
Author(s): Dubessy, Jean
Affiliation: Russian Academy of Sciences, Siberian Branch, Institute of Mineraloyg and Petrography, Novosibirsk, Russian Federation
Affiliation: UMR, CREGU, Vandoeuvre-les-Nancy, France
Pages: 1241-1251
Published: 199812
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
Meeting name: ECROFI XIV (European Current Research on Fluid Inclusions) symposium
Meeting location: Nancy, FRA, France
Meeting date: 19970701July 1-4, 1997
References: 33
Accession Number: 1999-018596
Categories: Igneous and metamorphic petrology
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, geol. sketch map
S35°00'00" - S22°00'00", E16°00'00" - E33°00'00"
Secondary Affiliation: RAU, ZAF, South AfricaUniversity of the Witwatersrand, ZAF, South Africa
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 199907
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