Fossils from seabed bedrocks: Implications for the nature of the acoustic basement of the Mendeleev Rise (Arctic Ocean)

Сколотнев, С. Г.; Александрова, Г. Н.; Исакова, Т. Н.; Tolmacheva, T. Yu.; Kurilenko, A. V.; Raevskaya, Elena; Рожнов, С. В.; Petrov, Eugene; Korniychuk, A. V.

doi:10.1016/j.margeo.2018.11.002

Cited by 35 publications

(22 citation statements)

References 41 publications

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“…For the central part of the rise, the seismic data are obviously not enough for the accurate seismic stratigraphy of the lower part of the section. The available sampling data for three slopes of the Mendeleev Rise show that the acoustic basement may include deformed sedimentary Paleozoic sequences with Ordovician-Devonian fauna according to the data of S.G. Skolotnev (Insti-tute of Geology, RAS) [57], a subhorizontal sedimentary cover starts from the Aptian (Barremian-Aprian) [57]. The dykes with isotope ages of approximately 110-115 Ma intrude the Paleozoic deformed sediments.…”

Section: Composite Seismic Profile-2mentioning

confidence: 98%

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Sedimentary Basins of the East Siberian Sea and the Chukchi Sea and the Adjacent Area of the Amerasia Basin: Seismic Stratigraphy and Stages of Geological History

et al. 2019

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The seismic stratigraphy scheme for the shelf basins of the East Siberian Sea and the Chukchi Sea region and the adjacent deepwater area of the Amerasia basin has been developed, and mega-sequences (or tectonostratigraphic units) with the conventional ages of 125‒100, 100‒80, 80‒66, 66‒56, 46‒45, 45‒34, 34‒20, 20‒0 Ma are distinguished. Zhokhov foredeep basin of the Late Jurassic‒Neocomian age is distinguished between the New Siberia and the De Long islands. Three main phases of rifting are identified on the shelves in the region with ages of 125–100, 66–56, and 45–37 Ma. The main phase of continental rifting occurred in the Podvodnikov and Toll basins at 125‒100 Ma. The typical clinoform accumulation of sediments occurred at the edge of the shelf at 66–20 Ma. We identified three syntectonic epochs of the formation of clinoform sequences with the ages of 66–45, 45–34, and 34–20 Ma. The phase of uplifting and compression in the region of Wrangel Island happened at ≈66 Ma. The relatively monotonous tectonic setting with approximately the same thicknesses of the sedimentary cover began at 20 Ma.

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Section: Composite Seismic Profile-2mentioning

confidence: 98%

“…(3) correlation of seismic horizons with the results of lithological and faunistic sampling of three slopes in the area of the Mendeleev Rise by submersible vessels [57];…”

Section: Seismic Stratigraphy Substantiation Of the Arctic Regionmentioning

confidence: 99%

Sedimentary Basins of the East Siberian Sea and the Chukchi Sea and the Adjacent Area of the Amerasia Basin: Seismic Stratigraphy and Stages of Geological History

et al. 2019

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“…This suggests that the Paleozoic deposits are likely to be deformed into folds that image poorly due to their likely steep dip. At one site on the Trukshin Seamount (Skolotnev et al, 2019) samples of sandstones were taken at the base of a section of horizontal architecture that is well imaged on seismic sections. These sandstones were found to have Barremian-Aptian microfossils and detrital zircons with an age of about 120 Ma (Skolotnev et al, in preparation).…”

Section: Resultsmentioning

confidence: 99%

“…A principal aspect of this methodology is that rocks were sampled at regular depth intervals along such outcrops specifically for the purpose of constructing a geological cross-section. In total, 77 sites were sampled (Skolotnev et al, 2017(Skolotnev et al, , 2019.…”

Section: Deepwater Geological Expeditions In 2014 and 2016mentioning

confidence: 99%

Arctic Ocean Mega Project: Paper 1 - Data collection

Никишин

Petrov²,

Cloetingh

et al. 2021

Earth-Science Reviews

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“…At the far end of the Transpolar Drift, i.e., at the Mendeleev Rise on the other side of the Gakkel Ridge (Fig. 1), exposed bedrock was found in a number of scarps surveyed during the Expedition Arctic-2012 (Morozov et al, 2013;Kossovaya et al, 2018) and in later sampling by a submarine (Skolotneva et al, 2019). The high content of carbonates in the materials from the Mendeleev Rise is somewhat similar to what we find in the Nansen Basin sediments.…”

Section: Provenance Areas Of Reworked Pom and Ice-dropped Clastsmentioning

confidence: 99%

Palynomorphs and particulate organic matter in Late Pleistocene–Holocene deep- water sediments in the Nansen Basin (Arctic Ocean): From sources to sink

Morten¹,

Slagstad²,

Gautneb³

2022

NJG

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Deep-sea surface clay sediments and ice-dropped clasts collected at 3998 m water depth in the Nansen Basin (88.4⁰N-28.4⁰E) have been examined for palynomorphs and particulate organic matter (POM). Quaternary-Holocene marine palynomorphs and dispersed organic particles are subordinate to pre-Quaternary material and the studied samples contain mostly terrigenous organic matter. Most of the palynomorphs and organic matter are reworked from strata ranging from Late Devonian to late Cenozoic in age. The Quaternary-Holocene marine assemblages contain mostly species with wide thermal tolerances, and only few Arctic to cold-water specimens. This points towards warmer water conditions than today during the time of deposition. Detrital U-Pb geochronology from one ice-dropped clast is compatible with deposition in the Devonian, with a detrital zircon age spectrum characterised by Palaeoproterozoic through Neoproterozoic ages and a youngest peak at c. 400 Ma. The possible provenance areas of most of the reworked POM and ice-dropped clasts in the Nansen Basin are far from the deep-basin sink, including areas on the Siberian Craton drained by the Lena River and other major rivers flowing into the Laptev Sea, as well as areas in the northern Barents Shelf between Svalbard and Severnaya Zemlya, where glacially eroded troughs run into the Nansen Basin.

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Fossils from seabed bedrocks: Implications for the nature of the acoustic basement of the Mendeleev Rise (Arctic Ocean)

Cited by 35 publications

References 41 publications

Sedimentary Basins of the East Siberian Sea and the Chukchi Sea and the Adjacent Area of the Amerasia Basin: Seismic Stratigraphy and Stages of Geological History

Sedimentary Basins of the East Siberian Sea and the Chukchi Sea and the Adjacent Area of the Amerasia Basin: Seismic Stratigraphy and Stages of Geological History

Arctic Ocean Mega Project: Paper 1 - Data collection

Palynomorphs and particulate organic matter in Late Pleistocene–Holocene deep- water sediments in the Nansen Basin (Arctic Ocean): From sources to sink

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