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TitleCroissance et fonte de glaciers d'âge holocène dans la région de la rivière Keel, dans l'île de Baffin, au Nunavut
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AuthorSt-Jean, M; Lauriol, B; Clark, I D; Utting, D J
SourceGeological Survey of Canada, Current Research (Online) 2007-B3, 2007, 9 pages, https://doi.org/10.4095/223692 (Open Access)
Year2007
PublisherNatural Resources Canada
Documentserial
Lang.French
Mediaon-line; digital
File formatpdf (Adobe Acrobat Reader)
ProvinceNunavut
NTS37H/04; 37H/05
Areanord de l'île de Baffin; rivière Keel; fjord Cambridge
Lat/Long WENS -76.0000 -75.0000 71.3333 71.1667
Subjectssurficial geology/geomorphology; environmental geology; Holocene; neoglaciation; glaciers; glaciology; paleoclimatology; climate effects; precipitation; ice; ice conditions; ice margins; ice samples; geochemical analyses; stable isotope studies; oxygen isotopes; hydrogen isotopes; radiometric dating; radiocarbon dating; organic materials; glacial history; Calotte glaciaire de Barnes; Betula; climate change; Phanerozoic; Cenozoic; Quaternary
Illustrationssketch maps; aerial photographs; satellite images; profiles; chronological charts; diagrams
ProgramIndian and Northern Affairs Canada, Northern Scientific Training Program
ProgramNSERC Natural Sciences and Engineering Research Council of Canada
Released2007 05 01
AbstractThis study presents climatological and glaciological elements linked to the growth and melting of three small ice caps in the Keel River area, Baffin Island, Nunavut. An hypothesis for the formation of plateau glaciers related to Neoglacial climate cooling 4000 to 5000 years ago, is questioned by the results of isotopic analyses of ice samples (delta-18O = -25 per mille to -21 per mille; delta-D = -190 per mille to -161 per mille) and radiocarbon dating. Mosses buried on the margin of one of the domes were dated at 3720 BP and leaves from the glacier surface, at 240 BP. Furthermore, the three ice caps have lost about half their area in the last 44 years.
GEOSCAN ID223692