Tectonostratigraphic evolution of the Labrador margin, Atlantic Canada

Dickie, K; Keen, C. E.; Williams, Graham L.; Dehler, Sonya A.

doi:10.1016/j.marpetgeo.2011.05.009

Cited by 57 publications

(38 citation statements)

References 45 publications

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“…The tectono-stratigraphic history of Saglek Basin is similar to that of Hopedale Basin, with many of the stratigraphic sequences present in both basins (Dickie et al, 2011). Because of the overall similarities of the two basins and for ease of discussion the nomenclature of the stratigraphic succession of the Saglek Onshore Labrador, the filtered Bouguer anomaly shows N-S oriented linear positive and negative anomalies corresponding with the Archean Churchill and Nain geological provinces (e.g.…”

Section: Saglek Basin Stratigraphymentioning

confidence: 88%

“…Saglek Basin, Stratigraphy, Structure and Petroleum Systems Page 235 started as early as Chron 31N (Reston, 2009;Dickie et al, 2011). A major change in direction of seafloor spreading in the Labrador Sea occurred at Chron 25N (base Eocene; Roest and Srivastava, 1989;Oakey and Chalmers, 2012) when Greenland separated from Eurasia and moved as an independent plate.…”

Section: Saglek Basin Extentmentioning

confidence: 99%

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Saglek Basin in the Labrador Sea, east coast Canada; stratigraphy, structure and petroleum systems

Jauer

Oakey

Williams

et al. 2014

Bulletin of Canadian Petroleum Geology

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Section: Saglek Basin Stratigraphymentioning

confidence: 88%

Section: Saglek Basin Extentmentioning

confidence: 99%

Saglek Basin in the Labrador Sea, east coast Canada; stratigraphy, structure and petroleum systems

Jauer

Oakey

Williams

et al. 2014

Bulletin of Canadian Petroleum Geology

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“…Opening of the Labrador Sea and rifting between Greenland and Europe competed for many tens of million years (Dickie et al, 2011;Hosseinpour et al, 2013;Barnett-Moore et al, 2016) before the present-day North East Atlantic mid-ocean ridge 10 formed in Eocene times (Gernigon et al, 2015;Gaina et al, 2017) possibly due to the arrival of the Iceland hotspot (Coffin and Eldholm, 1992;Storey et al, 2007). Final separation between Greenland and Europe took place along the sheared margin of the Fram Strait in Miocene times ~17-15 Ma (Jakobsson et al, 2007;Knies and Gaina, 2008).…”

Section: North Atlantic Riftmentioning

confidence: 99%

Oblique rifting: the rule, not the exception

Brune¹,

Williams²,

Müller³

2018

Preprint

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Abstract. Movements of tectonic plates often induce oblique deformation at divergent plate boundaries. This is in striking contrast with traditional conceptual models of rifting and rifted margin formation, which often assume 2D deformation 10 where the rift velocity is oriented perpendicular to the plate boundary. Here we quantify the validity of this assumption by analysing the kinematics of major continent-scale rift systems in a global plate tectonic reconstruction from the onset of Pangea breakup until present-day. We evaluate rift obliquity by joint examination of relative extension velocity and local rift trend using the script-based plate reconstruction software pyGPlates. Our results show that the global mean rift obliquity amounts to 34° with a standard deviation of 24°, using the convention that the angle of obliquity is spanned by extension 15 direction and rift trend normal. We find that more than ~70% of all rift segments exceeded an obliquity of 20° demonstrating that oblique rifting should be considered the rule, not the exception. In many cases, rift obliquity and extension velocity increase during rift evolution (e.g. Australia-Antarctica, Gulf of California, South Atlantic, India-Antarctica), which suggests an underlying geodynamic correlation via obliquity-dependent rift strength. Oblique rifting produces 3D stress and strain fields that cannot be accounted for in simplified 2D plane strain analysis. We therefore highlight the importance of 3D 20 approaches in modelling, surveying, and interpretation of most rift segments on Earth where oblique rifting is the dominant mode of deformation.

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“…The maps were revised using mainly generalized data reported after the publication of the atlas for large regions: Greenland (Vorren et al, 1993), Svalbard and BarentsKara sea region (Smerlor et al, 2009;Barents Shelf…, 1988;Shipilov and Tarasov, 1998), Alaska (Plafker and Berg, 1994), and Sverdrup Basin in the Canadian Arctic (Embry, 1991). We used also other comprehensive data for smaller regions (e.g., Dickie et al, 2011;Alekseev et al, 2011;Knaust, 2009;Spicer and Herman, 2010;Daly et al, 2011;Stein, 2010). As all the maps could not be presented in this paper, only the lithofacies maps (with isopachs) of the Circum Arctic belt in the Late Cretaceous and Oligocene are shown in Figs.…”

Section: Introductionmentioning

confidence: 99%

Mesozoic-Cenozoic sedimentation in the circum-arctic belt. 2. Cretaceous-Paleogene

2015

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New data from the literature on the Cretaceous-Paleogene of the Circum Arctic belt were used to revise lithological-paleogeographic maps published in 1983 by V.E. Khain, A.B. Ronov, and A.N. Bal ukhovskii. The region of our study is bounded by the present day break of the continental shelf of the Arctic Ocean in the north and the 60° N latitude in the south. The legend was simplified by omitting climatic and tectonic information and emphasizing lithofacies zoning. For each map, we calculated the areas and volumes of sediments of the distinguished lithofacies zones and particular rock groups. These data were used to esti mate the masses of dry sediments and accumulation rates. The distinguished variations of these quanti tative parameters in the Circum Arctic belt were compared with respective global trends related to tec tonic and climatic changes. The contributions of regional features of sedimentation and magmatism were identified. It was concluded that the global trends were the dominant factor controlling regional sedimentation history. Two stages, Cretaceous and Paleogene, were distinguished in the history of sedi mentation.

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Tectonostratigraphic evolution of the Labrador margin, Atlantic Canada

Cited by 57 publications

References 45 publications

Saglek Basin in the Labrador Sea, east coast Canada; stratigraphy, structure and petroleum systems

Saglek Basin in the Labrador Sea, east coast Canada; stratigraphy, structure and petroleum systems

Oblique rifting: the rule, not the exception

Mesozoic-Cenozoic sedimentation in the circum-arctic belt. 2. Cretaceous-Paleogene

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