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TitleGeological relationships in the Qaqqanittuaq area, southern Hall Peninsula, Baffin Island, Nunavut
 
AuthorMacKay, C B; Ansdell, K M; St-Onge, M R; Machado, G; Bilodeau, C
SourceCanada-Nunavut Geoscience Office, Summary of Activities 2012, 2013 p. 55-64 Open Access logo Open Access
LinksOnline - En ligne
Image
Year2013
Alt SeriesEarth Sciences Sector, Contribution Series 20120343
PublisherCanada-Nunavut Geoscience Office
Documentserial
Lang.English
Mediapaper
File formatpdf
ProvinceNunavut
NTS25I/07; 25I/08; 25I/09; 25I/10; 25I/11; 25I/13; 25I/14; 25I/15; 25J/15; 25J/16; 25O/01; 25O/02; 25O/06; 25O/07; 25O/08; 25O/09; 25O/10; 25O/11; 25O/15; 25O/16; 25P
AreaBaffin Island; Qaqqanittuaq; Hall Peninsula
Lat/Long WENS -67.5000 -64.0000 64.0000 62.2500
Subjectsigneous and metamorphic petrology; tectonics; structural geology; tectonic setting; tectonic environments; metamorphism; deformation; magmatism; Archean; structural features; intrusive rocks; orthogneisses; igneous rocks; quartzites; tonalites; granodiorites; monzo-granites; granites; gabbros; Lake Harbour Group; Cumberland Batholith; Precambrian; Proterozoic
Illustrationslocation maps; photographs
ProgramCanada-Nunavut Geoscience Office, Funding Program
AbstractThis study is part of the Canada-Nunavut Geoscience Office's Hall Peninsula Integrated Geoscience Program, a multiyear bedrock and surficial geology mapping program with associated thematic studies. The Qaqqanittuaq area (QA), a southeast-trending, doubly plunging, synformal structural basin on the southern Hall Peninsula, Nunavut, contains rock units and relationships representative of the supracrustal rocks and mafic and ultramafic intrusions in the eastern domain of Machado et al. (2013). Biotite tonalite and intrusions of monzogranite and syenogranite form the crystalline, gneissic structural basement of the QA. The structural basin comprises a series of supracrustal rocks dominated by micaceous psammite with lesser quartzite and pelite. The supracrustal rocks are intruded by a series of mafic and ultramafic intrusions and younger monzogranite sills and dikes. Two distinct deformational events (D1 and D2) are thought to have occurred in the QA, with peak metamorphic conditions (upper amphibolite;M1) being reached during D1. The gneissic layering containing the peak metamorphic assemblage of sillimanite-garnet-K-feldspar-biotite was folded during D2, when the structural basin developed. Post-D2 monzogranite intrusions occur in the supracrustal sequence but are not observed in the crystalline, gneissic structural basement. Gossanous areas are locally present in the QA, most of which are attributed to the weathering of biotite. However, some are associated with quartz veining and contain minor sulphide (pyrite-pyrrhotite) mineralization.
GEOSCAN ID292134

 
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