Geodynamics of the Arctic: From proterozoic orogens to present day seafloor spreading

Smelror, Morten; Петров, О. В.

doi:10.1016/j.jog.2018.09.006

Cited by 11 publications

(11 citation statements)

References 124 publications

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“…Numerous aspects of Arctic geology remain unresolved or controversial, especially the Mesozoic history of the opening of the Amerasia Basin. In contrast, the opening of the Eurasia Basin and the evolution of features related to it are more clearly understood (Smelror and Petrov 2018). The succession of events shown on the present maps resulted from a compromise of interpretations presented in previous studies.…”

Section: Nature Scope and Methodologycontrasting

confidence: 76%

“…Prior to the Silurian, the elements that now constitute the Arctic region were widely scattered across the globe (Fig. 3), and numerous hypotheses exist concerning their origin and distribution (Nokleberg et al 2000;Miller et al 2010;Nelson et al 2013;Smelror and Petrov 2018). The major continents, Laurentia, Baltica and Siberia, were separated by large early Paleozoic oceans, Iapetus, Ural, and Ran (Domeier 2015;Torsvik and Cocks 2017).…”

Section: Pre-silurianmentioning

confidence: 99%

“…Following Late Cretaceous to Early Paleocene erosion, upper Paleogene marine deposition continued across the West Siberian Basin, Barents Shelf, and Svalbard (Smelror et al 2009;Smelror and Petrov 2018); especially thick Late Paleocene to Oligocene marine rocks blanket the western Barents Shelf (Smelror et al 2009). In the Paleocene, the Sverdrup Basin became dismembered as the Eurekan orogen progressed and thick, localized, clastic deposits mark the demise of the basin (Embry and Beauchamp 2008).…”

Section: Paleogenementioning

confidence: 99%

“…Major episodes of Cenozoic uplift and erosion are documented from some regions in the Arctic, and sedimentary sequences reaching 2-4 km have been exhumed and removed. This is particularly evident in the North Atlantic region and on the Barents and Kara shelves, where the effects of these processes on petroleum reservoirs have been studied in detail (see references in Smelror and Petrov 2018).…”

Section: Neogenementioning

confidence: 99%

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Paleotectonic and paleogeographic history of the Arctic region

Blakey¹

2021

atgeol

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Paleogeographic maps represent the ultimate synthesis of complex and extensive geologic data and express pictorially the hypothetical landscape of some region during a given time-slice of deep geologic time. Such maps, presented as paired paleogeographic and paleotectonic reconstructions, have been developed to portray the geologic history of the greater Arctic region over the past 400 million years. Collectively they depict four major episodes in the development of the Arctic region. The first episode witnessed early and middle Paleozoic terrane assembly and accretion during the Caledonian and Ellesmerian orogenies, which brought together many pieces of the Arctic collage along the northern margin of Laurussia. During the second phase, the assembly of Pangea in the late Paleozoic joined Siberia to Laurussia, an entity that became Laurasia during the subsequent break-up of Pangea. Then, Mesozoic subduction and terrane accretion constructed the Cordilleran margin and opened the Canada Basin. Finally, Cenozoic North Atlantic sea-floor spreading fully opened the Arctic Ocean.

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Section: Nature Scope and Methodologycontrasting

confidence: 76%

Section: Pre-silurianmentioning

confidence: 99%

Section: Paleogenementioning

confidence: 99%

Section: Neogenementioning

confidence: 99%

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Paleotectonic and paleogeographic history of the Arctic region

Blakey¹

2021

atgeol

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“…The studied samples from the Hårfagrehaugen Member contain a terrestrial palynoflora of low to medium species diversity (Figs. 15,16) (Maher, 2001;Nejbert et al, 2011;Senger et al, 2014;Tegner et al, 2015;Petrov et al, 2016, Smelror & Petrov, 2018.…”

Section: Age Of the Helvetiafjellet Formationmentioning

confidence: 99%

Late Triassic to Early Cretaceous palynostratigraphy of Kong Karls Land, Svalbard, Arctic Norway, with correlations to Franz Josef Land, Arctic Russia

Smelror¹,

Larssen²,

Olaussen³

et al. 2019

NJG

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The Upper Triassic, Jurassic and Lower Cretaceous succession on Kong Karls Land contains common to abundant, well preserved, marine and terrestrial palynomorphs. The palynological assemblages suggest a Norian age for the Flatsalen Formation, which comprises the oldest deposits exposed on the islands. The overlying Svenskøya Formation is dated as Norian/?Rhaetian to Early Toarcian. There are possible depositional breaks at the base of and within this formation. The overlying Kongsøya Formation is dated as Late Toarcian-Aalenian. There is no evidence of exposed Bajocian deposits on Kong Karls Land. The oldest, transgressive deposits of the Agardhfjellet Formation are dated as Bathonian, while the youngest part of this formation is of Kimmeridgian age. The oldest Cretaceous deposits exposed on Kong Karls Land are Valanginian-Hauterivian condensed carbonates assigned to the Tordenskjoldberget Member (Klippfisk Formation). Directly overlying the condensed unit are Upper Barremian, or possibly lowermost Aptian, marine shales of the Kolje Formation equivalent. The youngest rocks preserved on Kong Karls Land are fluvial deposits of the Hårfagrehaugen Member (Helvetiafjellet Formation) and the Kong Karls Land basaltic lava flows. The terrestrial palynomorphs found in the Håfagrehaugen Member support a latest Barremian to Aptian age for the Helvetiafjellet Formation, as suggested by the U-Pb geochronology.

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Tectonostratigraphic evolution of the Novaya Zemlya archipelago, Arctic Russia: Challenges, implications, and potential

Martins

2024

Earth-Science Reviews

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Geodynamics of the Arctic: From proterozoic orogens to present day seafloor spreading

Cited by 11 publications

References 124 publications

Paleotectonic and paleogeographic history of the Arctic region

Paleotectonic and paleogeographic history of the Arctic region

Late Triassic to Early Cretaceous palynostratigraphy of Kong Karls Land, Svalbard, Arctic Norway, with correlations to Franz Josef Land, Arctic Russia

Tectonostratigraphic evolution of the Novaya Zemlya archipelago, Arctic Russia: Challenges, implications, and potential

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