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TitleCaractérisation structurale et métamorphique de la marge sud-est du Groupe de Wakeham, régions du lac Musquaro et de La Romaine, Province de Grenville (Québec, Canada)
AuthorBonnet, A -L; Corriveau, L
SourceGeological Survey of Canada, Current Research (Online) no. 2003-C17, 2003, 12 pages,
PublisherNatural Resources Canada
Mediaon-line; digital; CD-ROM
RelatedThis publication is contained in the following publications
File formatpdf
NTS12K/01; 12K/02; 12K/03; 12K/07; 12K/10; 12K/11; 12K/14
AreaMusquaro Lake; Kégaska; baie des Loups; La Romaine
Lat/Long WENS-61.5000 -60.0000 51.0000 50.0833
Subjectsigneous and metamorphic petrology; stratigraphy; structural geology; bedrock geology; igneous rocks; metamorphic rocks; metamorphism; deformation; granulite facies; amphibolite facies; granites; metasedimentary rocks; volcano-sedimentary strata; lithology; paragenesis; structural features; gneisses; amphibolites; tonalites; foliation; Wakeham Group; Grenville Province; Precambrian
Illustrationssketch maps; photographs
ProgramTargeted Geoscience Initiative (TGI-1), 2000-2003
Released2003 03 14
AbstractAgeological transect across volcano-sedimentary extensions of the southeastern margin of the Wakeham Group (eastern Grenville Province) and surrounding granitoid rocks has revealed the existence of polyphase Pinwarian (ca. 1.5 Ga) and Grenvillian (1.01 Ga) deformation and regional metamorphism. Metamorphic grade in the 1.5 Ga Wakeham Group extensions increases to the southeast from middle amphibolite to granulite facies, whereas the gneissic granitoid rocks record 1.01 Ga regional metamorphism that reached middle amphibolite facies. We suggest that a compartmentalization of Grenvillian deformation on a regional scale, with deformation effects concentrated in zones of less competent material, led to the preservation of the early granulites. On a regional scale, the pattern defined by the Grenvillian fabric within the granitoids and metasedimentary rocks consists of basin-and-dome structures produced by polyphase