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TitleBedrock geology of the Ellice Hills map area and new constraints on the regional geology of the Committee Bay area, Nunavut
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AuthorSkulski, T; Sandeman, H; Sanborn-Barrie, M; MacHattie, T; Young, M; Carson, C; Berman, R; Brown, J; Rayner, N; Panagapko, D; Byrne, D; Deyell, C
SourceGeological Survey of Canada, Current Research (Online) no. 2003-C22, 2003, 11 pages, https://doi.org/10.4095/214204
Year2003
PublisherNatural Resources Canada
Documentserial
Lang.English
Mediaon-line; digital; CD-ROM
RelatedThis publication is contained in the following publications
File formatpdf
ProvinceNunavut
NTS56P
AreaCommittee Bay; Ellis Hills
Lat/Long WENS-90.0000 -88.0000 68.0000 67.0000
Subjectsregional geology; Archean; basalts; komatiites; igneous rocks; psammites; semipelites; iron formations; bedrock geology; sills; structural features; folds; faults; plutons; granodiorites; tonalites; rhyolites; metasedimentary rocks; Committee Bay belt; Prince Albert Group; Woodburn Lake Group; Murmac Bay Group; Precambrian; Proterozoic
Illustrationssketch maps; stratigraphic sections; photographs
ProgramTargeted Geoscience Initiative (TGI-1), 2000-2003
Released2003 03 14
AbstractThe Ellice Hills map area (NTS 56 P), southwest of Committee Bay, contains two belts of Archean supracrustal rocks intruded by younger, diverse plutonic rocks. The Ellice Hills supracrustal strand is a west-northwest-facing belt of interbedded psammite, semipelite, silicate iron-formation, komatiite, and basalt. To the south, the Committee Bay supracrustal belt contains komatiite, semipelite, psammite, and iron-formation, overlain by quartzite, rare intermediate volcanic rocks, and interbedded psammite and semipelite. Ultramafic sills intrude the supracrustal rocks. Folded with the Archean supracrustal rocks is a small outlier of younger meta-arkose and calc-arenite. A regionally extensive, northeast-striking, 2610 Ma intrusive complex of K-feldspar-magnetite granodiorite and monzogranite intrudes supracrustal rocks in the south. To the north, the supracrustal belts are cut by tonalite, granodiorite, monzogranite, and diorite plutons that are likely part of a widespread, 2610-2580 Ma plutonic suite. The northern part of the Ellice Hills area is intruded by a large biotite-muscovite monzogranite pluton.
GEOSCAN ID214204