| Title | Bedrock geology of the southern Boothia mainland area (Pelly Bay-Rae Strait-Spence Bay map areas), Kitikmeot region, Nunavut |
| Download | Downloads |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Ryan, J J; Nadeau, L; Hinchey, A M; James, D T; Sandeman, H A; Schetselaar, E M ; Davis, W J; Berman, R G |
| Source | Geological Survey of Canada, Current Research (Online) no. 2009-1, 2009, 21 pages, https://doi.org/10.4095/226519  Open Access |
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| Year | 2009 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Media | on-line; digital |
| File format | pdf (Adobe Acrobat Reader) |
| Province | Nunavut |
| NTS | 57A; 57B; 57C; 57D |
| Area | Boothia Mainland; Pelly Bay-Rae Strait; Spence Bay; Kitikmeot |
| Lat/Long WENS | -96.0000 -88.0000 70.0000 68.0000 |
| Subjects | stratigraphy; structural geology; economic geology; bedrock geology; metamorphism; metamorphic rocks; gneisses; migmatites; Archean; igneous rocks; plutonic rocks; granites; monzonites; granodiorites;
orthogneisses; radiometric dating; radiometric dates; metasedimentary rocks; deformation; structural features; folds; faults; metamorphic facies; granulite facies; mineral potential; diamond; Rae Province; Prince Albert Group; Chantrey Group; Amer
Group; Piling Group; Barclay belt; Burwash Lake belt; Proterozoic; Precambrian; Paleozoic |
| Illustrations | location maps; photographs; tables |
| Program | Northern Resources Development Program |
| Released | 2009 02 25 |
| Abstract | The Boothia mainland area, part of the north-central Rae Province, comprises a high-grade gneissic terrain dominated by Neoarchean metaplutonic rocks, migmatitic gneiss, Archean supracrustal rocks, and
rare Paleoproterozoic supracrustal rocks. The Archean supracrustal rocks are inferred to be cor- relative with the regionally widespread Prince Albert Group. Granitic rocks and their gneissic equivalents are dominated by meta- to peraluminous,
polyphase, commonly porphyritic, biotite- and hornblende-bear- ing monzogranite to granodiorite. U-Pb zircon ages indicate they are part of a 2.61 to 2.59 Ga magmatic event recognized throughout most of the Rae Province. Lesser 2.67 to 2.66 Ga
plutonism represents a previously unknown age of magmatism in the Rae Province. Small outliers of Paleoproterozoic Chantrey Group metasedimentary rocks (Burwash Lake belt) occur as complex infolds in the Archean rocks, and cor- relate with other Rae
Province Paleoproterozoic cover sequences, such as the Amer and Piling groups. The dominant structural fabric of the study area is a moderately to intensely developed regional trans- position foliation (S1), which is folded about map-scale,
northeast-trending, Paleoproterozoic F4 folds, doubly plunging about less pervasive north-northwest-trending F5 folds. High-grade (granulite to upper amphibolite facies) metamorphism and migmatization is interpreted to have occurred during 2.6, 2.5,
and 1.82 Ga metamorphic events. The north-central Rae Province has signifi cant exploration potential for diamonds. In addition, the Archean metavolcanic rocks in the area have exploration potential for base and precious metals. |
| GEOSCAN ID | 226519 |
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