|Auteur||Embry, A; Beauchamp, B|
|Source||Sedimentary basins of the United States and Canada, 2nd edition; par Miall, AD; 2019 p. 559-592, https://doi.org/10.1016/B978-0-444-63895-3.00014-0|
|Séries alt.||Ressources naturelles Canada, Contribution externe 20200286|
|Éditeur||Elsevier Science Bv|
|Media||papier; en ligne; numérique|
|SNRC||48G; 48H; 49; 340B; 340C; 58G; 58H; 68G; 68H; 59; 69; 78G; 78H; 79; 560A; 560B; 560C; 560D; 88G; 88H; 89|
|Lat/Long OENS||-120.0000 -80.0000 82.0000 75.0000|
|Sujets||antécédents géologiques; tectonique de plaques; antécédents tectoniques; économique; evolution du bassin; Bassin de Sverdrup ; géologie économique; géologie générale; géochronologie; Sciences et
|Illustrations||cartes de localisation; tableaux; cartes géologiques généralisées; échelles stratigraphiques; photographies; coupes stratigraphiques|
|Diffusé||2019 01 01|
|Résumé||(disponible en anglais seulement)|
The Sverdrup Basin is located in the Canadian Arctic Islands. It is 1000 km by 350 km and is filled with up to 13 km of Carboniferous to Paleogene strata. The
basin initially developed in Early Carboniferous as a rift basin upon highly deformed Early Paleozoic strata of the Ellesmerian Orogenic Belt. The development of the basin can be broken into eight phases, each being characterized by a distinctive
combination of tectonic, depositional, and climatic regimes and separated by episodes of widespread uplift and basin reorganization.
The Upper Paleozoic strata are up to 5 km thick and are characterized by a distinct shelf to deep basin
topography. Carbonate strata dominated the shelf until Middle Permian and were supplanted by siliciclastics and chert in Middle and Late Permian when the climate cooled. Triassic siliciclastics, derived from cratonic areas to the east and south and
from Crockerland to the north, are up to 4 km thick and they filled the deep, central basin by Late Triassic.
From latest Triassic to earliest Cretaceous the basin was occupied by shallow siliciclastics shelves and up to 2 km of strata
accumulated. Renewed rifting in Early Cretaceous resulted in a thick succession (2 km) of Early Cretaceous nonmarine to shallow marine strata with units of basalts in the northeast. Widespread diabase sill and dyke intrusion, likely related to the
Alpha Ridge Plume and the opening of the Amerasia Ocean Basin, occurred at this time. Following an interval of low subsidence and low sediment supply in the Late Cretaceous, the basin began to be deformed in earliest Paleocene by the Eurekan Orogeny
driven by the counterclockwise rotation of Greenland. Local foreland basins developed and contain up to 3 km of Paleocene-Eocene strata. In Late Eocene the basin was uplifted and deformed by faulting and folding with deformation decreasing
Eighteen oil and gas fields have been discovered in Eurekan anticlines and potential prospects include traps associated with Eurekan structures, salt domes, reefs, and prominent unconformities. Widespread petroleum source rocks
are documented in Middle and Upper Triassic strata and likely occur with other stratigraphic intervals from Carboniferous to Lower Cretaceous.
|Sommaire||(Résumé en langage clair et simple, non publié et disponible en anglais seulement)|
This publication is about the Sverdrup Basin in the Canadian Arctic Islands. The researchers studied the
geological history of this basin, which is a large area filled with layers of rocks from the Carboniferous to Paleogene periods.
The main objectives were to understand how this basin formed and changed over time. The researchers identified eight
phases in the development of the basin, each marked by different geological and environmental conditions. They looked at how the landscape, climate, and rocks in the basin changed over millions of years.
One significant finding is that there are
potential oil and gas resources in the basin. They discovered evidence of oil and gas fields, and there are prospects for more. The researchers also identified rocks in the basin that could be the source of petroleum.
The scientific impact of this
publication is that it provides valuable information for the oil and gas industry. Understanding the geological history and potential resources in the Sverdrup Basin is crucial for future exploration and extraction. It also adds to our knowledge of
the Earth's geological processes, helping us piece together the history of this region in the Canadian Arctic Islands.