Middle Jurassic to Lower Cretaceous paleoclimate of Sverdrup Basin, Canadian Arctic Archipelago inferred from the palynostratigraphy

Jurassic to Cretaceous strata of Sverdrup Basin contain both marine and nonmarine fossils that serve to date interlayered sandstone and mudstone units and interpret paleoenvironments and paleoclimates. Applying a multi-variate statistical approach to long-ranging spore and pollen types typical for t...

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Bibliographic Details
Published in:Marine and Petroleum Geology
Main Authors: Galloway, Jennifer M., Sweet, Arthur R., Swindles, Graeme T., Dewing, Keith, Hadlari, Thomas, Embry, Ashton F., Sanei, Hamed
Format: Article in Journal/Newspaper
Language:English
Published: 2013
Subjects:
Arctic
Canada
Climate change
Cretaceous
Jurassic
Palynology
Sverdrup Basin
/dk/atira/pure/subjectarea/asjc/1900/1910
name=Oceanography
/dk/atira/pure/subjectarea/asjc/1900/1908
name=Geophysics
/dk/atira/pure/subjectarea/asjc/1900/1907
name=Geology
/dk/atira/pure/subjectarea/asjc/1900/1905
name=Economic Geology
/dk/atira/pure/subjectarea/asjc/1900/1913
name=Stratigraphy
/dk/atira/pure/sustainabledevelopmentgoals/climate_action
name=SDG 13 - Climate Action
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water
name=SDG 14 - Life Below Water
Canadian Arctic Archipelago
Ellef Ringnes Island
Hoodoo Dome
Arctic Archipelago
sverdrup basin
Online Access:https://pure.qub.ac.uk/en/publications/02de2d99-a49d-443b-bbe5-6d105c5f8905
https://doi.org/10.1016/j.marpetgeo.2013.01.001
http://www.scopus.com/inward/record.url?scp=84877927114&partnerID=8YFLogxK
Description
Summary:Jurassic to Cretaceous strata of Sverdrup Basin contain both marine and nonmarine fossils that serve to date interlayered sandstone and mudstone units and interpret paleoenvironments and paleoclimates. Applying a multi-variate statistical approach to long-ranging spore and pollen types typical for this time interval, we define four palynoassemblages within an Aalenian to Albian succession preserved in the Hoodoo Dome H-37 oil and gas well located on southern Ellef Ringnes Island near the centre of Sverdrup Basin. We propose an association between palynoassemblages and Middle Jurassic to Early Cretaceous pan-hemispherical climate events. The largest palynoassemblage shift occurs when an assemblage containing Classopollis classoides pollen is replaced by an assemblage dominated by pollen of the Taxodiaceae-Cupressaceae-Taxaceae in the late Valanginian or early Hauterivian. We interpret this vegetation change to a shift from a seasonally arid climate to cooler and more humid conditions in high latitude regions.

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