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TitleOverview of surficial geology activities in the Tehery-Wager GEM-2 Rae Project area, Nunavut
AuthorMcMartin, I; Randour, I; Byatt, J; Roy, M; LaRocque, A; Leblon, B; Day, S; Steenkamp, H M; Wodicka, N
Source43rd Annual Yellowknife Geoscience Forum, abstract and summary volumes; by Irwin, D; Normandeau, P X; Gervais, S D; Northwest Territories Geoscience Office, Yellowknife Geoscience Forum Abstracts Volume 2015, 2015 p. 133-134
Year2015
Alt SeriesEarth Sciences Sector, Contribution Series 20150288
PublisherNWT and Nunavut Chamber of Mines
Meeting43rd Annual Yellowknife Geoscience Forum; Yellowknife; CA; November 24-26, 2015
Documentserial
Lang.English
RelatedThis publication is related to McMartin, I; Randour, I; Byatt, J; Roy, M; LaRocque, A; Leblon, B; Day, S J A; Steenkamp, H M; Wodicka, N; (2016). Overview of surficial geology activities in the Tehery-Wager GEM-2 Rae Project area, Nunavut, Geological Survey of Canada, Scientific Presentation no. 40
File formatpdf
ProvinceNunavut
NTS46D/05; 46D/12; 46D/13; 46D/14; 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; 56H/01; 56H/02; 56H/03; 56H/04; 56H/05; 56H/06; 56H/07; 56H/08; 46E/03; 46E/04
AreaWager Bay; Chesterfield Inlet; Daly Bay; Roes Welcome Sound; Kazan Shield; Tehery-Wager
Lat/Long WENS -93.0000 -87.0000 65.8333 64.0000
Subjectssurficial geology/geomorphology; glacial deposits; glacial features; glacial landforms; tills; depositional environment; bedrock geology; stream sediment samples; Quaternary
ProgramRae Province, Tehery-Wager Bay, GEM2: Geo-mapping for Energy and Minerals
AbstractTargeted field work during the summer of 2015 in the eastern part of the Tehery-Wager GEM-2 Rae Project area, mainland Nunavut, has provided an opportunity to gather data on the history and pattern of glacial flow and ice margin retreat, to collect till and stream sediment samples for provenance and mineral composition, and to test preliminary remote predictive mapping (RPM) surficial materials classification maps with field observations. The work was undertaken to provide new geological knowledge on the nature and composition of surficial sediments deposited during previous glaciation(s), successive marine inundation and emergence, and addresses a number of scientific questions relevant to the mineral exploration industry.
The area between Wager Bay and Chesterfield Inlet is characterized by swaths of streamlined, thin and thick till extending southeast from the Keewatin Ice Divide zone centered in the uplands southwest of Wager Bay, which are dominated by a mixture of till deposits, felsenmeer and weathered bedrock. Along the central Wager Bay shores, early and late ice flows into and parallel to the bay are observed in the landform and striation record and suggest the ice divide extended in a narrow zone inland south of the bay. Till deposits are interspersed by a complex system of southeast-trending sub-glacial meltwater corridors and pro-glacial channels. These corridors comprise large eskers, outwash plains, small irregular hummocks, short streamlined landforms, eroded till remnants, boulder lags, and scoured bedrock. Continuous south-southeast-trending eskers, parallel to late striations, cross-cut the corridors and streamlined till in the central part of the region, and may be recessional features that formed after Daly Bay and Roes Welcome Sound became ice-free. The limit of marine submergence increases from ~119-125 m asl south of Wager Bay to about 138-152 m northwest of Daly Bay, as revealed by intensively wave-washed surfaces, wave-cut notches, bouldery deltas, high shorelines developed along esker flanks, and circular trimlines around small topographic highs. Marine sediment veneers occur as scattered deposits between rock ridges or glacial landforms in lowlands that skirt the coasts of Roes Welcome Sound and Chesterfield Inlet.
Bedrock samples were collected for cosmogenic nuclide dating on weathered outcrops under the ice divide zone to constrain the relative age of potentially preserved (older) surfaces under a cold-based dome, and on wave-washed bedrock surfaces to date the timing of marine incursion and subsequent retreat. Marine shells were collected for radiocarbon age determinations to provide minimum deglaciation ages. Till and stream sediment samples were collected to help evaluate mineral potential near geochemical anomalies identified in 2012 as part of GEM-1, to characterize the regional glacial transport (provenance), and to support bedrock mapping in drift covered terrain. A preliminary surficial materials map was produced by classifying a combination of Landsat-8, Radarsat-2 C-HH and C-HV and DEM/slope data. Its accuracy is currently validated with the field observations and aerial photos that were gathered during the summer of 2015.
Summary(Plain Language Summary, not published)
This poster presents a overview of the 2015 field work completed along the northwestern shores of Hudson Bay, mainland Nunavut, as part of the surficial geology component of the GEM 2 Tehery-Wager Activity within the Rae Project. The poster highlights preliminary results regarding the regional surficial geology and Quaternary history, the mapping of surficial materials using remote sensing, and the applications of glacial and stream sediment sampling for mineral exploration. The work was undertaken to provide new geological knowledge on the nature and composition of surficial materials deposited during the retreat of the Laurentide Ice Sheet, successive marine inundation and emergence, and addresses a number of scientific questions relevant to the mineral exploration industry. The findings will support informed decision making for resource exploration and development, and for land use management.
GEOSCAN ID297288