GEOSCAN, résultats de la recherche


TitreTri-territorial surficial geology map integration
AuteurKerr, D; Robertson, L; Eagles, S; Parkinson, W; Giroux, D; Buller, G
Source37th Annual Yellowknife Geoscience Forum, abstracts of talks and posters; par Jackson, V; Palmer, E; Northwest Territories Geoscience Office, Yellowknife Geoscience Forum Abstracts Volume vol. 2009, 2009 p. 76-77 (Accès ouvert)
Séries alt.Secteur des sciences de la Terre, Contribution externe 20090225
Réunion37th Annual Yellowknife Geoscience Forum; Yellowknife; CA; Novembre 17-19, 2009
Documentpublication en série
ProvinceTerritoires du Nord-Ouest; Nunavut; Yukon
SNRC15; 16; 25; 26; 27; 28; 29; 36; 37; 38; 39; 45; 46; 47; 48; 49; 55; 56; 57; 58; 59; 65; 66; 67; 68; 69; 75; 76; 77; 78; 79; 85; 86; 87; 88; 89; 95; 96; 97; 98; 99; 105; 106; 106; 115; 116; 117; 120; 340; 560
Lat/Long OENS-141.0000 -56.0000 84.0000 60.0000
Sujetsdépôts glaciaires; topographie glaciaire; géologie des dépôts meubles/géomorphologie; Cénozoïque; Quaternaire
ProgrammeGEM : La géocartographie de l'énergie et des minéraux
Résumé(disponible en anglais seulement)
As part of the Tri-Territorial Integration Project within GSC's Geo-mapping for Minerals Program (GEM), the Surficial Geoscience Activity is producing a digital compilation and queriable database of new and existing surficial geology maps for onshore and offshore areas of Yukon, Northwest Territories, and Nunavut. Other cooperative work is being carried in North-East British Columbia and Alaska.
The Surficial Materials Map of Canada (GSC Map 1880A, 1:5M), was based on information collected prior to 1992. Since then, considerable surficial geoscience mapping in various digital formats has been undertaken in the North. Together with previous compilations, extensive ongoing searches, and assistance from Territorial partners, the following map sources have been identified: NWT - 145 maps (including 75 in digital format); Nunavut >115 maps (including 80 in digital format); Yukon: (~300 in digital format); Northern BC >12 maps (including 9 in digital format).
Map 1880A is a base to which data from more recent digital surficial maps (1:50,000 to 1:1M scale), and related digital databases are added. Consistency of surficial geology units is assured through their integration into standard GIS formats using a national unified legend. Significant effort and resources are currently being applied to conversion of analog geological maps to digital vector GIS format, in the form of high quality, digital vector data ready for cartographic production. It includes georeferencing, vectorizing line, point and polygon data from scanned maps, attributing data and creating polygon topology.
As part of a larger Tri-T database network being prepared in consultation with NRCan and Territorial partners, the surficial geoscience database will enhance understanding of broad-scale spatial relationships between mineral resources and geology. It will ensure effective delivery of web-accessible surficial geology maps, with accompanying queriable map database. The surficial database will be populated with source-map information at source-map scale. Map parsing and populating the database will begin when networks are established. The GSC will update regularly as source-map information becomes available digitally.
By providing a seamless geological context for resource and ecosystem management, environmental impact assessment, geotechnical concerns and infrastructure development, it will assist northern communities, and industry/university/government geoscientists, GEM Program and GSC/Territorial managers. A web compilation map will facilitate the correlation of regional surficial geology units and changes in ice flow across political boundaries, meeting a key need of aiding resource exploration in the North. The mineral exploration industry is very active in drift-covered areas of Northern Canada and relies greatly on knowledge of glacial sediments, indicator mineral, dispersal trains, and ice-flow history. The exploration sector requires a modern, uniform Quaternary geological database to support more effective drift prospecting relating to diamonds, gold, PGE, and base metal and U deposits in under-explored areas. Production of a Tri-T paper surficial compilation map is also key in documenting and illustrating the ongoing mapping coverage and advances in the North as well as serve to highlight knowledge gaps to better focus future surficial mapping projects.