The Current State of the Arctic Basin Study

Avetisov, G. P.; Butsenko, V. V.; Chernykh, A. A.; Firsov, Yury G.; Glebovsky, V. Y.; Гусев, Е. А.; Kireev, A. A.; Krylov, Alexey; Zinchenko, Anna G.

doi:10.1007/978-3-319-77742-9_1

Cited by 5 publications

(5 citation statements)

References 65 publications

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“…The strong predominance of dolomites among the studied clasts suggests their preferential delivery from the platform area of the Canadian Arctic Archipelago that was impacted by the Laurentide Ice Sheet and is composed mainly of Paleozoic dolomites (e. g., Victoria Island) (e. g., Trettin, 1991;Harrison et al, 2013;Dewing et al, 2015). A similar conclusion was reached earlier on the basis of a petrographical study of clasts > 2 mm collected by box corers in the central Arctic Ocean (Phillips and Grantz, 2001), as well as a geochemical study of dolomitic "pink-white" layers at the Mendeleev Ridge (Bazhenova et al, 2017). It is unlikely that the dolomites were delivered from Alaska, which has not undergone significant glaciations at the shoreline (e. g., Jakobsson et al, 2014), and therefore could not supply a large number of icebergs that are the main carrier of the large rock fragments.…”

Section: Discussionsupporting

confidence: 72%

“…Upper figure -the most common rocks, bottom -remaining rocks drilling at the Mendeleev Ridge (Morozov et al, 2013;Petrov et al, 2016). Wide distribution of HALIP at the Mendeleev Ridge has also been confirmed by geophysical surveys (e. g., Chernykh et al, 2018;Avetisov et al, 2019). Therefore, iceberg and probably sea-ice transport were the main mechanisms of supplying the clasts to the studied sites.…”

Section: Discussionmentioning

confidence: 68%

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Origin of the coarse-grained (> 1 cm) clasts from the Mendeleev Ridge area (Central Arctic Ocean)

Krylov

VNIIOkeangeologia

Matthießen

et al. 2020

Vestnik SPbSU. Earth Sciences

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The morphometric and petrographic characteristics of the coarse-grained clasts (> 1 cm) sampled from the sediments of the Amerasian Basin, Central Arctic Ocean, were studied. Most of the clasts are represented by dolomites (46,4%), sandstones (22,8%) and limestones (19,8%); the amount of other rocks fragments (chert, shale, igneous) is about 10%. A variety of lithological types were identified among the studied rock fragments. Limestones and dolomitic limestones often contain fragments of fauna. The majority of clasts is poorly rounded and characterized by a wide variety of shapes. More than half of the studied clasts have a size of 1-2 cm, a quarter - 2-3 cm, and larger clasts only occur in insignificant amounts. Geophysical surveys across the sampling sites showed a lack of bedrock outcrops, so the studied coarse-grained clasts are not of local origin. It is concluded that they were predominantly delivered from the Canadian Arctic Archipelago (likely from the platform area, e.g., Victoria Island), mainly due to iceberg rafting during deglaciation periods. The maximum possible contribution of the clasts from the Siberian sources is less than 23%. Distribution of the coarse-grained clasts argues for the existence of a quite stable ice drift path in the past, which is similar to the modern Beaufort Gyre.

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Section: Discussionsupporting

confidence: 72%

Section: Discussionmentioning

confidence: 68%

Origin of the coarse-grained (> 1 cm) clasts from the Mendeleev Ridge area (Central Arctic Ocean)

Krylov

VNIIOkeangeologia

Matthießen

et al. 2020

Vestnik SPbSU. Earth Sciences

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“…Main results. In addition to the sheetwise state geological mapping of the Arctic shelf, thematic generalizations of the obtained data were made, both cartographic and scientific, published as sketch maps, atlases, collections of articles and monographs [2,3]. In particular, the Atlas of Geological Maps of the Circumpolar Arctic was prepared [4,5] comprising geological, tectonic, and geophysical maps.…”

mentioning

confidence: 99%

Results and prospects of geological mapping of the Arctic shelf of Russia

Гусев

2022

PMI

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The results of compiling the sets of the State Geological Map at a scale of 1:1,000,000 for the Arctic continental shelf of Russia are analyzed. Results are summed up, and the main problems of geological mapping are outlined. The results of geological and geophysical studies of the Arctic Ocean are of great importance for deciphering the geological evolution. The Arctic shelf is the widest shelf in the world, while the spreading ocean basin is one of the narrowest and is characterized by anomalous structural features. The main problems of geological mapping include identification the sedimentary cover/folded basement boundary, interpretation the geodynamic evolution of the shelf and adjacent ocean, determining the rates of sedimentation and stratigraphic subdivision of the sedimentary cover due to a small number of key boreholes. It is promising to further study problem areas with unclear features of geological structure as well as small-scale mapping in areas of industrial development on the Arctic continental shelf.

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“…Самый нижний рефлектор является поверхностью акустического фундамента, представленного, судя по всему, кровлей кристаллического фундамента архей-протерозойского возраста. Возраст складчатого основания островов Северной Земли различен, здесь выделяют блоки байкальской стабилизации, области каледонской складчатости, а также блоки, затронутые событиями, относящимися либо к герцинской складчатости, либо завершающими каледонский этап [12,15,16]. В отличие от островов Большевик и Октябрьской Революции, на северных островах архипелага степень деформаций палеозойских пород заметно меньше.…”

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Geological structure of the northern part of the Kara Shelf near the Severnaya Zemlya archipelago according to recent studies

Гусев

Krylov

Urvantsev

et al. 2020

PMI

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Until recently, the North of the Kara Shelf was completely unexplored by seismic methods. Seismic and seismo-acoustic data that have appeared in recent years have made it possible to decipher features of the regional geological structure. This study solves the urgent problem of determining the prospects for the oil and gas potential of the North Kara sedimentary basin. The relevance of the research is associated with determining the prospects of the oil and gas potential of the North Kara sedimentary basin. The aim of the study is to clarify the age of the reflecting horizons using data on the geology of the island, as well as to determine the tectonic position of the sedimentary cover and basement structures in the north of the Kara shelf. The sedimentary cover is divided into three structural levels: Cambrian-Devonian, Middle Carboniferous-Cretaceous, Miocene-Quarter. The Cambrian-Devonian complex fills the deep troughs of the North Kara shelf. The most noticeable discontinuity is the base of Carboniferous-Permian rocks, lying on the eroded surface of folded Silurian-Devonian seismic complexes. The blanket-like plate part of the cover is composed of thin Carbon-Quarter complexes. The authors came to the conclusion that the fold structures of the Taimyr-Severozemelskiy fold belt gradually degenerate towards the Kara sedimentary basin and towards the continental slope of the Eurasian basin of the Arctic Ocean. A chain of narrow uplifts within the seabed relief, which correspond to narrow anticlines is traced to the West of the Severnaya Zemlya islands. Paleozoic rocks have subhorizontal bedding further to the West, within the Kara shelf. Mesozoic folding in the North of the Kara Sea is expressed exclusively in a weak activation of movements along faults. At the neotectonic stage, the shelf near Severnaya Zemlya was raised and the Mesozoic complexes were eroded. The modern seismic activity of the North Zemlya shelf is associated with the ongoing formation of the continental margin.

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The Current State of the Arctic Basin Study

Cited by 5 publications

References 65 publications

Origin of the coarse-grained (> 1 cm) clasts from the Mendeleev Ridge area (Central Arctic Ocean)

Origin of the coarse-grained (> 1 cm) clasts from the Mendeleev Ridge area (Central Arctic Ocean)

Results and prospects of geological mapping of the Arctic shelf of Russia

Geological structure of the northern part of the Kara Shelf near the Severnaya Zemlya archipelago according to recent studies

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