GEOSCAN, résultats de la recherche


TitreGeological controls on the present temperature field of the western Sverdrup Basin, Canadian Arctic Archipelago
AuteurChen, Z; Grasby, S E; Dewing, K; Osadetz, K G; Brent, T
SourceBasin Research 30, S1, 2018 p. 479-496, (Accès ouvert)
Séries alt.Secteur des sciences de la Terre, Contribution externe 20120284
ÉditeurJohn Wiley & Sons
Documentpublication en série
Mediapapier; en ligne; numérique
SNRC89A; 89B; 89C; 89D; 89E; 89F; 79; 69; 59C; 59B; 88G; 88H; 78G; 78H
Lat/Long OENS-120.0000 -89.0000 80.0000 74.0000
Sujetsdiapirs de sel; diapirs; analyses thermiques; regimes thermiques; bassins; altération thermique; antecedents thermiques; anticlinaux; débits d'alimentation en eau
Illustrationscorrelation charts; plots; cross-sections; histograms; graphs
ProgrammeBassin sédimentaire Sverdrup, GEM : La géocartographie de l'énergie et des minéraux
Diffusé2017 01 20
Résumé(disponible en anglais seulement)
Analysis of current temperature data from more than 100 wells in the Canadian Arctic Archipelago resulted in the recognition of two major thermal regimes. Elevated temperature regions are observed in association with salt diapirs and salt cored anticlines. Depressed temperature fields are observed along the western and southern basin margins and around Cornwall-Amund Ringnes islands, where regional Mesozoic aquifers are exposed to surface or connected to basin boundary faults or regional unconformities. Meteoric and Holocene sub-glacial water recharge are inferred to be responsible for the depressed geothermal regime and low formation water salinity. Neither exhumation associated with the Eocene ''Eurekan'' orogeny nor volcanic intrusion associated with opening of Canada Basin in late Jurassic-early Cretaceous had significant influence on the present day temperature field, although thermal indicators show evidence of elevated thermal alternations of organic matter pointing to earlier, but now dissipated, thermal anomalies.