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TitreA revised look at Canada's Landscape: Glacial processes and dynamics
AuteurPaulen, R C
SourceNew Frontiers for Exploration in Glaciated Terrain, PDAC 2013 short course; 2013 p. 5-12
Année2013
Séries alt.Secteur des sciences de la Terre, Contribution externe 20120409
RéunionNew Frontiers for Exploration in Glaciated Terrain workshop, PDAC 2013 International Convention; Toronto; CA; mars 1, 2013
Documentlivre
Lang.anglais
Mediapapier
Référence reliéeCette publication est reliée Paulen, R C; Paulen, R C; (2013). A revised look at Canada's landscape: glacial processes and dynamics, New frontiers for exploration in glaciated terrain, Commission géologique du Canada, Dossier public 7374
ProvinceColombie-Britannique; Alberta; Saskatchewan; Manitoba; Ontario; Québec; Nouveau-Brunswick; Nouvelle-Écosse; Île-du-Prince-Édouard; Terre-Neuve-et-Labrador; Territoires du Nord-Ouest; Yukon; Nunavut
SNRC1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65; 66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560
Lat/Long OENS-141.0000 -50.0000 90.0000 41.7500
Sujetselements glaciaires; dépôts glaciaires; antecedents glaciaires; topographie glaciaire; dynamique sédimentaire; nappes glaciaires; mouvement de la glace; retrait de la glace; Calotte glaciaire Laurentide; géologie des dépôts meubles/géomorphologie; Cénozoïque; Quaternaire
Illustrationslocation maps; aerial photographs; tables
ProgrammeBases de données couvrant les trois territoires (minéraux indicateurs), GEM : La géocartographie de l'énergie et des minéraux
Résumé(disponible en anglais seulement)
Our understanding of the Laurentide Ice Sheet has been significantly improved by recent developments in theoretical models of ice sheets and ice dynamics, understanding of mechanisms of glacial erosion, transport and deposition, and mapping of glacial deposits and drift composition. Theoretical models have increasingly accommodated diverse glaciological, physiographic and geological factors that can affect ice flow, and have been used to reinterpret the geological record in terms of glacial processes.
The glacial system of North America is described at scales from continental (thousands of square kilometres), to regional (hundreds of square kilometres), local (kilometres to tens of kilometres), and site-specific (hundreds of metres to kilometres). Drift prospecting is based on an understanding that indicators of economic mineralization recovered from glacial deposits can be traced back to their original bedrock source. Geochemical, mineralogical and lithological methods employed in the exploration for mineral deposits in glaciated terrain requires knowledge of past glacial flow direction(s), means of entrainment, and variations in the nature of glacial dispersal such as glacial sediment thickness, bedrock topography, bedrock erodibility, and basal glacial flow velocity gradient. Combined, this knowledge is used to determine the distance to the up-ice bedrock source from the identified down-ice dispersal train location. Over the last two decades, drift prospecting in northern Canada has significantly improved through the continued development of ice sheets models, and the acquisition of empirical evidence for ice-flow patterns, drift composition and glacial history. Increased attention to the dynamic nature of glacial dispersal centers and related ice-flow complexes has thus become increasingly important for mineral exploration in northern Canada.
GEOSCAN ID292239