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TitleOverview of bedrock mapping and results from portable X-ray fluorescence spectrometry in the eastern part of the Tehery Lake-Wager Bay area, western Hudson Bay, Nunavut
AuthorSteenkamp, H M; Wodicka, N; Lawley, C J M; Peterson, T D; Guilmette, C
SourceCanada-Nunavut Geoscience Office, Summary of Activities 2015, 2015 p. 121-133 (Open Access)
LinksOnline - En ligne (incl. supplemtary data - données supplémentaires)
Alt SeriesEarth Sciences Sector, Contribution Series 20150328
PublisherCanada-Nunavut Geoscience Office
File formatpdf
NTS46D/05; 46D/11; 46D/12; 46D/13; 46D/14; 46E/03; 46E/04; 46E/05; 46E/06; 56A; 56B; 56C/01; 56C/02; 56C/07; 56C/08; 56C/09; 56C/10; 56C/15; 56C/16; 56F/01; 56F/02; 56F/07; 56F/08; 56F/09; 56F/10; 56F/15; 56F/16; 56G/01; 56G/02; 56G/03; 56G/04; 56G/05; 56G/06; 56G/07; 56G/08; 56G/09; 56G/10; 56G/11; 56G/12; 56G/13; 56G/14; 56H/01; 56H/02; 56H/03; 56H/04; 56H/05; 56H/06; 56H/07; 56H/08; 56H/09; 56H/10; 56H/11; 56H/12; 56H/13
AreaHudson Bay; Tehery Lake; Wager Bay; Roes Welcome Sound; Daly Bay
Lat/Long WENS -93.0000 -86.7500 65.8500 64.0000
Subjectsregional geology; mineralogy; stratigraphy; surficial geology/geomorphology; economic geology; field methods; spectrometric analyses; x-ray fluorescence; geological history; tectonic history; depositional history; magmatism; metamorphism; deposition; alteration; bedrock geology; lithology; metasedimentary rocks; metamorphic rocks; igneous rocks; intrusive rocks; volcanic rocks; tonalites; gneisses; granodiorites; monzo-granites; syenites; orthogneisses; amphibolites; basalts; andesites; porphyries; quartzites; iron formations; plutons; shear zones; structural features; faults; mineral deposits; mineral assemblages; metals; silver; gold; platinum; nickel; copper; bismuth; cobalt; iron; arsenides; glacial deposits; tills; till samples; stream sediment samples; Snow Island Suite; Hudson Suite; Wager Shear Zone; Quoich River Fault; Chesterfield Fault; Mackenzie Dyke Swarm; Daly Bay Complex; syenogranites; monzogranites; in situ methods; nondestructive methods; chemostratigraphic tools; Archean; Paleoproterozoic; Mesoproterozoic; garnetites; supracrustal rocks; Precambrian
Illustrationsgeological sketch maps; photographs; plots
ProgramPolar Continental Shelf Program
ProgramGEM2: Geo-mapping for Energy and Minerals
ProgramStrategic Investments in Northern Economic Development (SINED)
ProgramCanada-Nunavut Geoscience Office, Funding Program
AbstractThe Tehery-Wager geoscience mapping activity is a four-year initiative conducted by the Geological Survey of Canada and the Canada-Nunavut Geoscience Office. The project aims to gather new geoscience knowledge to create modern bedrock and surficial geological maps, evaluate the economic potential in the area and characterize the tectonic, magmatic, depositional and metamorphic history of the rock units therein. The first of two field seasons of bedrock geological mapping in the Tehery Lake-Wager Bay area, north of Chesterfield Inlet, Nunavut in 2015 focused on better documentation and characterization of rock types and features across the eastern part of the study area. Major lithological units include Archean tonalite to granodiorite gneiss, monzogranite to syenogranite gneiss, K-feldspar-phyric monzogranite (likely correlative with the 2.6Ga Snow Island suite), presumed Proterozoic supracrustal rocks, undeformed monzogranite to syenogranite (likely correlative with the 1.85-1.81 Ga Hudson suite) and roughly coeval ultrapotassic clinopyroxenite to syenite intrusions. Portable X-Ray fluorescence (pXRF) spectrometry analyses of mafic to intermediate orthogneiss, and amphibolite layers in the tonalite to granodiorite orthogneiss and metasedimentary panels, were collected in the field. The interpreted data suggest that the rocks have diverse, variably metasomatized basaltic to andesitic compositions. Least altered samples range from primitive and mantle-like to more evolved compositions that, coupled with diverging multi-element patterns, point to multiple, chemically distinct subpopulations within the basaltic sample suite. The preliminary results highlight the advantage of in situ, real-time and nondestructive pXRF measurements as a chemostratigraphic tool that can be used in the field to support bedrock mapping.
Summary(Plain Language Summary, not published)
The Tehery-Wager Geoscience Project is a four-year project being done by the Geological Survey of Canada and the Canada-Nunavut Geoscience Office. The project aims to gather new geoscience knowledge to create modern bedrock and surface sediment maps, look at the economic potential, and understand the events that created and changed the rocks in the area. The first of two field seasons of bedrock mapping was completed in the eastern part of the Tehery-Wager region, north of Chesterfield Inlet, Nunavut, this past summer and focused on documenting and interpreting rock types, folds and faults. Major rock units that were observed include 2.9 and 2.7 billion year old (Ga) tonalite to syenogranite, monzogranite with large K-feldspar grains (likely the same as the 2.6 Ga Snow Island Suite), metamorphosed sedimentary rocks, undeformed monzogranite to syenogranite (likely the same as the 1.85-1.81 Ga Hudson Suite), and potassium-rich clinopyroxenite to syenite intrusions.