| Title | Upper Paleozoic stratigraphy and detrital zircon geochronology along the northwest margin of the Sverdrup Basin, Arctic Canada: insight into the paleogeographic and tectonic evolution of
Crockerland |
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| Author | Galloway, B J; Dewing, K ; Beauchamp, B; Matthews, W |
| Source | Canadian Journal of Earth Sciences vol. 58, no. 2, 2021 p. 164-187, https://doi.org/10.1139/cjes-2019-0226 |
| Image |  |
| Year | 2021 |
| Alt Series | Natural Resources Canada, Contribution Series 20210156 |
| Publisher | Canadian Science Publishing |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf; html |
| Province | Nunavut |
| NTS | 69F; 69G; 79C; 79E; 79F; 89B; 89C; 89D; 89E |
| Area | Queen Elizabeth Islands; Brock Island; Mackenzie King Island; Prince Patrick Island; Ellef Ringnes Island |
| Lat/Long WENS | -120.0000 -102.0000 79.7500 76.5000 |
| Subjects | stratigraphy; geochronology; tectonics; geophysics; Nature and Environment; Science and Technology; sedimentary basins; paleogeography; tectonic evolution; faulting; subsidence; crustal uplift; erosion;
sediment transport; depositional history; clastics; provenance; exploration wells; lithostratigraphy; stratigraphic correlations; bedrock geology; structural features; faults; grabens; sedimentary wedges; bedrock geology; lithology; sedimentary
rocks; geophysical surveys; seismic reflection surveys; crustal structure; radiometric dating; uranium lead dating; zircon dates; Sverdrup Basin; Melvillian Disturbance; Devonian Clastic Wedge; Crockerland; Nansen Formation; Raanes Formation;
Trappers Cove Formation; Great Bear Cape Formation; Sabine Bay Formation; Assistance Formation; van Hauen Formation; Degerböls Formation; Trold Fiord Formation; Northern Ellef Ringnes Structural High; Laurentia; Ellesmerian Orogeny; Phanerozoic;
Paleozoic; Permian; Carboniferous; Devonian |
| Illustrations | location maps; geoscientific sketch maps; stratigraphic charts; tables; correlation sections; seismic profiles; plots; schematic cross-sections |
| Program | Geoscience for New Energy Supply (GNES) Frontier basin analysis |
| Released | 2020 07 07 |
| Abstract | The upper Paleozoic succession along the northwest margin of the Canadian Arctic Sverdrup Basin is little studied and poorly understood yet has the potential to yield insights into the paleogeographic
and tectonic evolution of the Arctic regions including Crockerland. Carboniferous and Permian drill cuttings were collected from five exploration wells on Brock, Mackenzie King, and Ellef Ringnes islands. Seven unconformity-bounded sequences were
identified and correlated. Reflection seismic interpreted on Ellef Ringnes Island indicates that a major syn-sedimentary fault offsets the Mississippian succession bounding a down-to-the-north half-graben. Late Pennsylvanian (Gzhelian) fault
reactivation, associated with the Melvillian Disturbance, created a depression that extended northward and was bordered to the south by a structural high. Episodic minor fault reactivation occurred until the Early-Middle Permian boundary. During the
latest Early Permian (Kungurian), sand derived from Crockerland prograded southward onto the Sverdrup Basin's northwest margin and continued into the Roadian. After a lull during the Wordian, clastic progradation resumed in the Capitanian. Detrital
zircon U-Pb ages recovered from Kungurian and Roadian samples on Brock and Ellef Ringnes islands display Devonian Clastic Wedge (DCW) signatures. A Moscovian-Artinskian carbonate blanket likely covered Crockerland and sheltered DCW material from
erosion, implying it was a subsiding, carbonate bank throughout most of the Pennsylvanian - Early Permian. Base level fall in the Kungurian, associated with a transition to a more humid climate, breached these carbonate rocks to allow erosion and
transportation of DCW material. Recycling of the DCW started earlier (Artinskian) and peaked later (Wordian) along the southern margin of the basin. |
| Summary | (Plain Language Summary, not published)
The paper describes the age and origin of rocks that are about 330 to 250 Million years old along the northwestern side of the Canadian Arctic Islands.
The samples come from oil and gas exploration boreholes drilled in the 1970s. |
| GEOSCAN ID | 328583 |
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