| Title | Geology, Sylvia Grinnell Lake (north), Baffin Island, Nunavut |
| Download | Downloads |
| Author | St-Onge, M R; Weller, O M; Dyck, B J; Rayner, N M; Chadwick, T; Liikane, D |
| Source | Geological Survey of Canada, Canadian Geoscience Map 253S, 2016, 1 sheet, https://doi.org/10.4095/297963 (Open Access) |
| Image |  |
| Year | 2016 |
| Alt Series | Canada-Nunavut Geoscience Office Open File Map 2016-10S |
| Publisher | Natural Resources Canada |
| Edition | prelim. |
| Document | serial |
| Lang. | Inuktitut |
| Maps | 1 map |
| Map Info. | geological, bedrock, structural geology, 1:100,000 |
| Projection | Universal Transverse Mercator Projection, UTM zone 19 (NAD83) |
| Media | digital; on-line |
| Related | This publication is a translation of St-Onge, M R; Weller, O
M; Dyck, B J; Rayner, N M; Chadwick, T; Liikane, D; (2016). Geology, Sylvia Grinnell Lake (north), Baffin Island, Nunavut, Geological Survey of Canada, Canadian Geoscience Map no. 253E, ed. prelim. |
| File format | readme
|
| File format | rtf; pdf; shp; xml; xls |
| Province | Nunavut |
| NTS | 26C/09; 26C/10; 26C/11; 26C/12; 26C/13; 26C/14; 26C/15; 26C/16 |
| Area | Baffin Island |
| Lat/Long WENS | -70.0000 -68.0000 65.0000 64.5000 |
| Subjects | structural geology; stratigraphy; bedrock geology; igneous rocks; plutonic rocks; metamorphic rocks; metasedimentary rocks; monzo-granites; leucogranites; diorites; marbles; quartzites; deformation;
structural features; faults; folds; metamorphism; Proterozoic; Precambrian |
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| Program | Baffin Bedrock Mapping, GEM2: Geo-mapping for Energy and Minerals |
| Released | 2016 05 17 |
| Abstract | This map summarizes the field observations for the Sylvia Grinnell Lake (north) map area following eight weeks of regional and targeted bedrock mapping on western Hall Peninsula. The 2015 field campaign
completes a two-decade mission to update map coverage for the whole of Baffin Island south of latitude 70°N. The bedrock is dominated by a Paleoproterozoic metaplutonic suite, ranging in composition from gabbro to syenogranite, with crosscutting
relations indicating a progression from mafic to silicic magmatism. Prevailing upper amphibolite to lower granulite facies metamorphic conditions overlap the stability limits of magnetite and orthopyroxene, which is consistent with equilibrium phase
diagrams and regional aeromagnetic data. Metasedimentary rocks, including quartzite, pelite, marble, and metagreywacke, are present as screens and enclaves between and within plutonic bodies. An examination of the 'ghost' stratigraphy suggests that
the metasedimentary rocks can be correlated with the middle Paleoproterozoic Lake Harbour Group in the south and Piling Group in the north. Two basaltic dyke swarms and shallowly dipping Ordovician limestone respectively crosscut and overly the
Paleoproterozoic units. |
| Summary | (Plain Language Summary, not published)
This map summarizes the field observations for the northern Sylvia Grinnell Lake area. The 2015 field campaign completes a two-decade mission to update
map coverage for the whole of Baffin Island south of latitude 70°N. The bedrock is dominated by a Paleoproterozoic metaplutonic suite, ranging in composition from gabbro to syenogranite. Prevailing upper amphibolite to lower granulite facies
metamorphic conditions overlap the stability limits of magnetite and orthopyroxene, which is consistent with equilibrium phase diagram s and regional aeromagnetic data. Metasedimentary rocks are present as screens and enclaves between and within
plutonic bodies. An examination of the ¿ghost¿ stratigraphy suggests that the metasedimentary rocks can be correlated with the middle Paleoproterozoic Lake Harbour Group in the south and Piling Group in the north. Two basaltic dyke swarm s and
shallowly dipping Ordovician limestone respectively cross-cut and overly the Paleoproterozoic units. |
| GEOSCAN ID | 297963 |
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