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TitleGeology, Sylvia Grinnell Lake (south), Baffin Island, Nunavut
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AuthorSt-Onge, M R; Weller, O M; Dyck, B J; Rayner, N M; Chadwick, T; Liikane, D
SourceGeological Survey of Canada, Canadian Geoscience Map 254E, 2016, 1 sheet, https://doi.org/10.4095/297593
Year2016
Alt SeriesCanada-Nunavut Geoscience Office Open File Map 2016-11E
Alt Series254
PublisherNatural Resources Canada
Editionprelim.
Documentserial
Lang.English
Maps1 map
Map Info.geological, bedrock, structural geology, 1:100,000
ProjectionUniversal Transverse Mercator Projection, zone 19 (NAD83)
Mediadigital; on-line
RelatedThis publication is a translation of St-Onge, M R; Weller, O M; Dyck, B J; Rayner, N M; Chadwick, T; Liikane, D; (2016). Geology, Sylvia Grinnell Lake (south), Baffin Island, Nunavut, Geological Survey of Canada, Canadian Geoscience Map no. 254S, ed. prelim.
File formatreadme
File formatrtf; pdf; shp; xml; xls
ProvinceNunavut
NTS26C/01; 26C/02; 26C/03; 26C/04; 26C/05; 26C/06; 26C/07; 26C/08
AreaBaffin Island
Lat/Long WENS -70.0000 -68.0000 64.5000 64.0000
Subjectsstructural geology; stratigraphy; bedrock geology; sedimentary rocks; limestones; igneous rocks; plutonic rocks; metamorphic rocks; metasedimentary rocks; monzo-granites; leucogranites; diorites; marbles; deformation; structural features; faults; folds; metamorphism; Amadjuaq Formation; Proterozoic; Precambrian
ProgramBaffin Bedrock Mapping, GEM2: Geo-mapping for Energy and Minerals
Image
Released2016 04 05
AbstractThis map summarizes the field observations for the Sylvia Grinnell Lake (south) map area following eight weeks of regional and targeted bedrock mapping on western Hall Peninsula. The 2015 field campaign completes a two-decade mission to update map coverage for the whole of Baffin Island south of latitude 70°N. The bedrock is dominated by a Paleoproterozoic metaplutonic suite, ranging in composition from gabbro to syenogranite, with crosscutting relations indicating a progression from mafic to silicic magmatism. Prevailing upper amphibolite to lower granulite facies metamorphic conditions overlap the stability limits of magnetite and orthopyroxene, which is consistent with equilibrium phase diagrams and regional aeromagnetic data. Metasedimentary rocks, including quartzite, pelite, marble, and metagreywacke, are present as screens and enclaves between and within plutonic bodies. An examination of the 'ghost' stratigraphy suggests that the metasedimentary rocks can be correlated with the middle Paleoproterozoic Lake Harbour Group in the south and Piling Group in the north. Two basaltic dyke swarms and shallowly dipping Ordovician limestone respectively crosscut and overly the Paleoproterozoic units.
Summary(Plain Language Summary, not published)
This map summarises the field observations for the southern Sylvia Grinnell Lake area following eight weeks of regional and targeted bedrock mapping. The 2015 field campaign completes a two-decade mission to update map coverage for the whole of Baffin Island south of latitude 70°N. The bedrock is dominated by a Paleoproterozoic metaplutonic suite, ranging in composition from gabbro to syenogranite, with cross-cutting relations indicating a progression from mafic to silicic magmatism. Prevailing upper amphibolite - lower granulite facies metamorphic conditions overlap the stability limits of magnetite and orthopyroxene, which is consistent with equilibrium phase diagrams and regional aeromagnetic data. Metasedimentary rocks, including quartzite, pelite, marble and greywacke, are present as screens and enclaves between and within plutonic bodies. A compilation of the "ghost" stratigraphy suggests that the metasedimentary rocks can be correlated with the middle Paleoproterozoic Lake Harbour Group in the south and the Piling Group in the north.
GEOSCAN ID297593