|Title||Regional bedrock mapping of northern Baffin Island (Steensby Inlet and Barnes Ice Cap areas), Nunavut: GEM-2 Baffin Project, report of activities 2018|
|Author||Skipton, D R; Saumur, B M; St-Onge, M R|
|Source||Geological Survey of Canada, Open File 8484, 2018, 16 pages, https://doi.org/10.4095/312408 (Open Access)|
|Publisher||Natural Resources Canada|
|NTS||37E/03; 37E/04; 37E/05; 37E/06; 37E/11; 37E/12; 37E/13; 37E/14; 37F; 37G; 38B/01; 38B/02; 38B/03; 38B/04; 38B/05; 38B/06; 38B/7; 38B/08; 38B/09; 38B/10; 38B/11; 38B/12; 38B/15; 38B/16|
|Area||Baffin Island; Steensby Inlet; Barnes Ice Cap; Mary River; Pond Inlet; Sirmilik National Park|
|Lat/Long WENS|| -80.0000 -74.0000 72.8333 70.0000|
|Subjects||regional geology; economic geology; field work; bedrock geology; basement geology; lithology; sedimentary rocks; sandstones; dolostones; shales; limestones; siltstones; iron formations; igneous rocks;
intrusive rocks; diabases; gabbros; monzo-granites; granodiorites; leucogabbros; diorites; monzonites; felsic rocks; volcanic rocks; metamorphic rocks; gneisses; orthogneisses; metasedimentary rocks; psammites; pelites; Archean; compilation;
modelling; intrusions; plutons; mineral deposits; mineralization; iron; Mary River iron mine; Franklyn Dyke; Borden Basin; Mary River Group; Piling Group; Bedrock Data Model; geological mapping; syenogranites; siliciclastic rocks; calc-silicate
rocks; geographic information systems; databases; Phanerozoic; Mesozoic; Cretaceous; Paleozoic; Precambrian; Proterozoic|
|Illustrations||location maps; geoscientific sketch maps; photographs|
|Program||Mary River North Baffin, GEM2: Geo-mapping for Energy and Minerals|
|Program||Polar Continental Shelf
|Released||2018 10 31|
This is a progress report on the fieldwork, map compilation and geoscience research undertaken in the GEM-2 North Baffin bedrock mapping activity during late 2016 to 2018, as part of
the GEM-2 Baffin Project (Fig. 1).
Geological maps inform industry, government, and community stakeholders of potential economic resources. During the past two decades, the Precambrian and Phanerozoic bedrock geology has been mapped in extensive
areas of Nunavut. Updated regional bedrock map coverage for Baffin Island south of latitude 70°N was completed in 2016 (St-Onge et al., 2016). The activity described herein represents the first steps towards an updated geological framework of Baffin
Island north of 70°N, with the goal of producing maps at a scale and resolution commensurate with those produced for the southern portion of the island.
Improved geological maps will help determine the potential for diamonds, base metals and
carving stone in northern Baffin Island. In 2017, fieldwork was conducted in NTS sheets 37G and 38B, including the area around Pond Inlet and part of Sirmilik National Park (Fig. 2). The second and final phase of bedrock mapping for the GEM-2 North
Baffin project was completed in the summer of 2018 in the area bordering Steensby Inlet and the Barnes Ice Cap (NTS sheet 37F and parts of sheets 37E and 37G; Fig. 2), and included the world-class Mary River iron mine operated by Baffinland Iron
Results of 2017 fieldwork and research are presented in previous reports (Skipton et al., 2017; Saumur et al., 2017; Bros and Johnston, 2017). Three new bedrock geology maps stemming from the 2017 mapping campaign were published
in 2018, and are publically available online (Saumur et al., 2018a, b; Skipton et al., 2018). Twelve rock samples representing the main map units have been dated using the U/Pb Sensitive High Resolution Ion Microprobe (SHRIMP) method, and research
studies are ongoing into the tectono-metamorphic evolution of the area and implications for economic mineralization. The new maps and preliminary research results were presented to geoscientists and community stakeholders at the Nunavut Mining
Symposium in April 2018 (Saumur et al., 2018c; Bros et al., 2018).
|Summary||(Plain Language Summary, not published)|
This report presents an update on the fieldwork and map compilation undertaken as part of the GEM-2 North Baffin bedrock mapping activity during 2018.
The study area includes the high-grade, large-tonnage Mary River iron deposit, but the geology of the host rocks to the deposit (Mary River Group) and the surrounding granitic rocks remains poorly understood. Improved geological maps of the area will
contribute to our knowledge of the geological evolution and mineral potential of Canada's Arctic.