|Title||Regional geochemical mapping of oxide-sulphide gossans and their reactive zones in permafrost, Canadian Arctic Archipelago|
|Author||Williamson, 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|
|Source||Geological Society of America, Abstracts With Programs vol. 45, no. 7, 2013 p. 868|
|Links||Online - En ligne|
|Alt Series||Earth Sciences Sector, Contribution Series 20130129|
|Publisher||The Geological Society of America (GSA)|
|Meeting||125th Anniversary Annual Meeting & Expo, The Geological Society of America; Denver; US; October 27-30, 2013|
|NTS||67C; 67F; 67G; 77; 78A; 78B; 78C; 78D; 87; 88A; 88B; 88C; 88D|
|Area||Axel Heiberg Island; Victoria Island|
|Lat/Long WENS||-120.0000 -100.0000 74.0000 68.0000|
|Lat/Long WENS||-97.0000 -84.0000 81.5000 78.0000|
|Subjects||geochemistry; surficial geology/geomorphology; permafrost; freezing ground; permafrost geochemistry; sulphides; oxides; gossans|
|Program||environmental impacts and adaptation in the northern environment, Environmental Geoscience|
|Abstract||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.
|Summary||(Plain Language Summary, not published)|
We present the results of a multidisciplinary study on gossans associated with mineralization of volcanic bedrock on Victoria Island, Northwest
Territories, and Axel Heiberg Island, Nunavut. Mineralogical and geochemical databases have an impact on environmental geoscience and mineral exploration strategies in the Canadian Arctic.