| Title | Quaternary geology of the south Core Zone area, Quebec and Labrador |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Rice, J M ;
Paulen, R C; Ross, M; McClenaghan, M B; Campbell, H E |
| Source | Geological Survey of Canada, Preprint 5, 2022, 58 pages, https://doi.org/10.4095/330903  Open Access |
| Image |  |
| Year | 2022 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Media | digital; on-line |
| File format | pdf |
| Province | Quebec; Newfoundland and Labrador |
| NTS | 23I; 23P |
| Lat/Long WENS | -66.0000 -64.0000 56.0000 54.0000 |
| Subjects | surficial geology/geomorphology; glacial deposits; glacial features; glacial landforms; tills; till analyses; ice flow; ice sheets; till geochemistry; till deposits; ice movement directions;
deglaciation; indicator elements; Laurentide Ice Sheet; Northwest Keewatin; South Rae; Quaternary |
| Illustrations | tables; location maps; photographs; images |
| Program | GEM2: Geo-mapping for Energy and Minerals |
| Released | 2022 11 02 |
| Abstract | The complex glacial geomorphology of east-central Quebec and western Labrador has resulted in conflicting ice sheet reconstructions leaving many questions regarding the behaviour of large ice sheets
within their inner regions. Specifically, the ice-flow chronology and subglacial conditions remain poorly constrained. To address this, surficial geology investigations were conducted across the border of Quebec and Labrador. A complex glacial
history consisting of five ice-flow phases influenced by regional ice stream dynamics was identified, including a near-complete ice-flow reversal. During each ice-flow phase, the subglacial thermal conditions fluctuated both spatially and temporally,
resulting in palimpsest glacial dispersal patterns. Deglacial ages from samples collected as part of this research confirm deglaciation occurred relatively rapidly around 8 ka. The results of this work improve our understanding of the glacial history
of an inner region of the Laurentide Ice Sheet and have important implications for mineral exploration in the southern Core Zone area. |
| Summary | (Plain Language Summary, not published)
The complex glacial geomorphology of east-central Quebec and western Labrador has resulted in many questions regarding the behaviour of the Laurentide
Ice Sheet in this region during the last glaciation. Specifically, the ice-flow chronology and amount of erosion and dispersal resulting from these ice-flow events remain poorly constrained. To address this, surficial geology investigations were
conducted across the border of Quebec and Labrador. Five ice-flow phases influenced by regional ice stream dynamics were identified, including a near-complete ice-flow reversal. During each ice-flow phase, the degree of glacial dispersal fluctuated
both spatially and temporally, resulting in palimpsest glacial dispersal patterns. Deglacial ages from samples collected as part of this research confirm deglaciation occurred relatively rapidly around 8 ka. The results of this work improve our
understanding of the glacial history of an inner region of the Laurentide Ice Sheet and have important implications for mineral exploration in the southern Core Zone area. |
| GEOSCAN ID | 330903 |
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