| Title | Bedrock geology, Mumiksaa-Milne Inlet, Nunavut, parts of NTS 38-B and 48-A |
| Download | Downloads |
| Author | Saumur, B M; Skipton, D R; St-Onge, M R; Wodicka, N; Bros, E R; Weller, O M |
| Source | Geological Survey of Canada, Canadian Geoscience Map 348, 2018, 1 sheet, https://doi.org/10.4095/306579 (Open Access) |
| Image |  |
| Year | 2018 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Maps | 1 map |
| Map Info. | geological, bedrock geology, 1:100,000 |
| Projection | Universal Transverse Mercator Projection, UTM zone 17 (NAD83) |
| Media | on-line; digital |
| Related | NRCan photo(s) in this
publication |
| Related | For all publications in this survey, see the
following publications |
| File format | readme
|
| File format | pdf (Adobe® Reader®); dbf (ESRI® ArcGIS(TM) v.10.2.2); shp (ESRI® ArcGIS(TM) v.10.2.2); xml (ESRI® ArcGIS(TM) v.10.2.2); mxd (ESRI® ArcGIS(TM) v.10.2.2) |
| Province | Nunavut |
| NTS | 38B/03NW; 38B/03SW; 38B/04; 38B/05; 38B/06NW; 38B/06SW; 38B/11SW; 38B/12SE; 38B/12SW; 48A/01; 48A/02; 48A/03SE; 48A/03SW |
| Area | Mumiksaa; Milne Inlet |
| Lat/Long WENS | -80.5167 -78.5833 72.5833 72.0000 |
| Subjects | regional geology; stratigraphy; structural geology; bedrock geology; lithology; sedimentary rocks; sandstones; coal; shales; limestones; siltstones; cherts; dolostones; conglomerates; breccias;
bioherms; evaporites; gypsum; iron formations; psammites; igneous rocks; intrusive rocks; diabases; gabbros; monzo-granites; granodiorites; leucogranites; pyroxenites; leucogabbros; anorthosites; volcanic rocks; mafic volcanic rocks; komatiites;
metamorphic rocks; semipelites; quartzites; gneisses; diorites; pelites; structural features; faults; folds; anticlines; antiforms; synclines; synforms; fractures; grabens; shear zones; volcanic-sedimentary belts; bedding planes; sedimentary
structures; intrusions; dykes; sills; lenses; plutons; metamorphism; foliation; lineations; gneissosity; schistosity; crenulations; Archean; Eclipse Group; Franklin Dyke; Uluksan Group; Athole Point Formation; Victor Bay Formation; Angmaat Formation;
Iqqittuq Formation; Arctic Bay Formation; Eqalulik Group; Adams Sound Formation; Mary River Group; Stromatolites; syenogranites; banded iron formations; Phanerozoic; Mesozoic; Cretaceous; Precambrian; Proterozoic |
| Illustrations | location maps; index maps; photographs |
| Program | Mary River North Baffin, GEM2: Geo-mapping for Energy and Minerals |
| Program | Polar Continental Shelf
Program |
| Program | Parks Canada, Funding Program |
| Released | 2018 06 26 |
| Abstract | This map presents the field observations and initial geological interpretations for the Mumiksaa-Milne Inlet area (parts of NTS 38-B and 48-A), Baffin Island, Nunavut. The bedrock geology comprises
Archean tonalitic- to monzogranitic gneiss that includes minor mafic to intermediate components, and relatively homogeneous monzogranite-granodiorite intrusions. The Archean Mary River Group forms discontinuous volcano-sedimentary belts, consisting
of mafic volcanic rocks interlayered with siliciclastic strata, banded iron-formation, and felsic to intermediate and ultramafic volcanic units. The supracrustal rocks are intruded by monzogranite-granodiorite plutons. Pre-Mesoproterozoic rocks
record a complex structural history involving at least two regional deformation events and mineral assemblages indicate metamorphic conditions ranging from upper-greenschist to granulite facies. Mesoproterozoic clastic and carbonate platform
sequences of the Bylot Supergroup unconformably overlie Archean units in the central part of northern Baffin Island. These strata were deposited within a graben that forms part of the larger Borden Basin. |
| Summary | (Plain Language Summary, not published)
This map represents one of three bedrock geology maps resulting from six weeks of geological mapping conducted in the Pond Inlet - Mary River area of
northern Baffin Island during July-August 2017. This mapping forms part of the Geo-Mapping for Energy and Minerals (GEM-2) North Baffin Bedrock Mapping Project led by the Geological Survey of Canada. The study area is mainly comprised of approx.
2.9-2.7 billion years old granite-type rocks and approx. 2.7 billion years old volcanic and sedimentary rocks of the Mary River Group. This group of rocks hosts iron ore deposits, including the high-grade, large-tonnage Mary River deposit. The study
area also contains younger (approx. 1.27-1.24 billion years old) sedimentary rocks that mostly consist of sandstone, shale and limestone, known as the Bylot Supergroup. The new mapping presented here provides an improved understanding of the geology
of northern Baffin Island, with implications for economic mineral potential and the ancient assembly of tectonic plates in the eastern Canadian Arctic. |
| GEOSCAN ID | 306579 |
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