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TitreRegional geochemical mapping of oxide-sulphide gossans and their reactive zones in permafrost, Canadian Arctic Archipelago
AuteurWilliamson, M C; Harris, J; Percival, J B; McNeil, R J; Day, S J A; Kingsbury, C; Grunsky, E; McCurdy, M; Buller, G; Shepherd, J; Hillary, B
SourceGeological Society of America, Abstracts With Programs vol. 45, no. 7, 2013 p. 868
LiensOnline - En ligne
Année2013
Séries alt.Secteur des sciences de la Terre, Contribution externe 20130129
ÉditeurThe Geological Society of America (GSA)
Réunion125th Anniversary Annual Meeting & Expo, The Geological Society of America; Denver; US; Octobre 27-30, 2013
Documentpublication en série
Lang.anglais
Mediapapier
Formatshtml
ProvinceNunavut
SNRC67C; 67F; 67G; 77; 78A; 78B; 78C; 78D; 87; 88A; 88B; 88C; 88D
Lat/Long OENS-120.0000 -100.0000 74.0000 68.0000
Lat/Long OENS-97.0000 -84.0000 81.5000 78.0000
Sujetspergélisol; congélation du sol; géochimie du pergélisol; sulfures; oxydes; chapeaux ferrugineux; géochimie; géologie des dépôts meubles/géomorphologie
Programmeadaptation et impacts sur l'environnement, environnement du nord, Géosciences de l'environnement
Résumé(disponible en anglais seulement)
Gossans associated with flood basalt magmatism in the Canadian Arctic Islands are natural laboratories to study the fate of potentially harmful elements such as As, Cd, Co, Cr, Cu, Hg, Ni, and Pb, that are released into the permafrost environment during the oxidation of sulphides. Remote predictive mapping, orientation surveys, and the mineralogical and geochemical studies on samples collected during field work contribute to bridging the gap between the mineral exploration and environmental assessment cycles in Canada's North.
The objectives of the project (2011-2014) were to: (1) locate gossans in central Victoria Island and Axel Heiberg Island using satellite imagery; (2) measure the spectral signatures of surficial materials at key locations to improve the accuracy of remote predictive maps; (3) map and sample surface materials of alteration zones and stream sediments; (4) determine the stratigraphy, mineralogy, and geochemistry of protoliths, leach caps, gossans, and stream sediments. Gossans developed in volcanic terrain on Victoria Island and Axel Heiberg Island were mapped using a combination of LANDSAT, ASTER, SPOT5, and WorldView-2 satellite images.
Remote predictive maps were ground truthed during field work in 2011 and 2013. We report the results of detailed mineralogical and geochemical studies of the igneous protoliths, gossanous soils and stream sediments, with implications for environmental geoscience and metallogeny.
Résumé(Résumé en langage clair et simple, non publié)
Nous présentons les résultats d'une étude multidisciplinaire des chapeaux de fer associés au socle volcanique de l'île Victoria, Territoires du Nord-Ouest, et de l'île Axel Heiberg, Nunavut. Les données minéralogiques et géochimiques ont un impact sur la géoscience environmentale et les stratégies d'exploration minière dans l'Arctique canadien.
GEOSCAN ID292774