GEOSCAN, résultats de la recherche


TitreScientific network to decipher crustal evolution of the Arctic
AuteurPease, V; Lane, L; Faliede, J I; Stephenson, R; Coakley, B
SourceEos, Transactions of the American Geophysical Union vol. 92, no. 42, 2011 p. 361-363,
Séries alt.Secteur des sciences de la Terre, Contribution externe 20110189
Documentpublication en série
Mediapapier; en ligne; numérique
ProvinceRégion extracotière du nord
Lat/Long OENS-180.0000 180.0000 90.0000 70.0000
Sujetsmilieux tectoniques; évolution tectonique; interprétations tectoniques; études de la croûte; evolution de la croûte; bassins; Bassin de Canada ; tectonique
Illustrationslocation maps
ProgrammeCorridor et delta du Mackenzie, GEM : La géocartographie de l'énergie et des minéraux
Résumé(disponible en anglais seulement)
The tectonic evolution of the regions in and around the Arctic remains highly debated due to a lack of geologic knowledge, the region's geologic complexities, and the logistical difficulties of working at extreme latitudes. For example, the northward continuation of Paleozoic (?545-to 250-million-year-old) mountain belts is predicted yet unrecognized, and the tectonic development of the Canada Basin—which defines the nature of the crust in and around the Arctic—is still debated, partly because few research projects are regional in scope or link the submarine and subaerial environments. This has led some to speculate, for example, that oceanic crust underlies the entire Amerasian Basin, whereas others indicate a much more limited extent within the Canada Basin. A contributing factor in the development of such conflicting hypotheses is the traditional segregation of land-and marine-based researchers: Over the past several decades, Arctic campaigns have conducted marine, aerogeophysical, and geological investigations [e.g., Lawver et al., 2010], but few of these have integrated onshore and offshore environments. To address this shortcoming, a new multinational, multidisciplinary science network called the Circum-Arctic Lithosphere Evolution (CALE) project seeks to integrate onshore geology with offshore geophysics in the Earth's northernmost regions.