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GEOREF RECORD

Magmatism of the Kwyjibo region, Grenville Province (Canada); application to iron-oxide associated mineralization

Benoit Magrina, Michel Jebrak and Michel Cuney
Le magmatisme de la region de Kwyjibo, Province du Grenville (Canada); interet pour les mineralisations de type fer-oxydes associees (in The Grenville Province; a geological and mineral resources perspective derived from government and academic research initiatives--La Province de Grenville; l'aspect des ressources geologiques et minerales decoulant des initiatives de recherche gouvernementales et academiques, Louise Corriveau (editor) and Thomas Clark (editor))
Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre (October 2005) 42 (10): 1849-1864

Abstract

The granitic plutons located north of the Kwyjibo property in Quebec's Grenville Province are of Mesoproterozoic age and belong to the granitic Canatiche Complex. The rocks in these plutons are calc-alkalic, K-rich, and meta- to peraluminous. They belong to the magnetite series and their trace element characteristics link them to intraplate granites. They were emplaced in an anorogenic, subvolcanic environment, but they subsequently underwent significant ductile deformation. The magnetite, copper, and fluorite showings on the Kwyjibo property are polyphased and premetamorphic; their formation began with the emplacement of hydraulic, magnetite-bearing breccias, followed by impregnations and veins of chalcopyrite, pyrite, and fluorite, and ended with a late phase of mineralization, during which uraninite, rare earths, and hematite were emplaced along brittle structures. The plutons belong to two families: biotite-amphibole granites and leucogranites. The biotite-amphibole granites are rich in iron and represent a potential heat and metal source for the first, iron oxide phase of mineralization. The leucogranites show a primary enrichment in REE (rare-earth elements), F, and U, carried mainly in Y-, U-, and REE-bearing niobotitanates. They are metamict and underwent a postmagmatic alteration that remobilized the uranium and the rare earths. The leucogranites could also be a source of rare earths and uranium for the latest mineralizing events.


ISSN: 0008-4077
EISSN: 1480-3313
Coden: CJESAP
Serial Title: Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre
Serial Volume: 42
Serial Issue: 10
Title: Le magmatisme de la region de Kwyjibo, Province du Grenville (Canada); interet pour les mineralisations de type fer-oxydes associees
Translated Title: Magmatism of the Kwyjibo region, Grenville Province (Canada); application to iron-oxide associated mineralization
Title: The Grenville Province; a geological and mineral resources perspective derived from government and academic research initiatives--La Province de Grenville; l'aspect des ressources geologiques et minerales decoulant des initiatives de recherche gouvernementales et academiques
Author(s): Magrina, BenoitJebrak, MichelCuney, Michel
Author(s): Corriveau, Louiseeditor
Author(s): Clark, Thomaseditor
Affiliation: COGEMA BUM/DEX, Villacoublay, France
Affiliation: Natural Resources Canada, Geological Survey of Canada, Quebec City, QC, Canada
Pages: 1849-1864
Published: 200510
Text Language: French
Summary Language: English
Publisher: National Research Council of Canada, Ottawa, ON, Canada
References: 50
Accession Number: 2006-043188
Categories: Economic geology, geology of ore depositsIgneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 6 tables, geol. sketch map
N51°00'00" - N51°00'00", W65°30'00" - W65°00'00"
Secondary Affiliation: Ministere des Ressources Naturelles et de la Faune, CAN, CanadaUniversite du Quebec a Montreal, CAN, CanadaUniversite Henri Poincare, FRA, France
Country of Publication: Canada
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 200612
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