Arctic Ocean Mega Project: Paper 1 - Data collection

Никишин, А. М.; Petrov, Eugene; Cloetingh, S.A.P.L.; Korniychuk, A. V.; Morozov, Andrey; Петров, О. В.; Poselov, V. A.; Beziazykov, Alexey V.; Сколотнев, С. Г.; Малышев, Н. А.; Verzhbitsky, V. E.; Posamentier, Henry W.; Фрейман, С. И.; Rodina, Elizaveta; Старцева, К. Ф.; Zhukov, Nikolay N.

doi:10.1016/j.earscirev.2021.103559

Cited by 20 publications

(23 citation statements)

References 66 publications

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“…6). Together, these data confirm the continental nature of the sub-basalt crust of the Alpha-Mendeleev Rise and the pre-Ordovician age proven for the sediments at the base of the sedimentary cover 3,4,13,21 .…”

Section: Seismic Analysissupporting

confidence: 78%

“…There is now strong evidence that the Amerasia Basin is largely floored by continental crust and to be of Early Cretaceous age [2][3][4][5][6]11,12 . The Alpha-Mendeleev Rise is thought to have formed from continental crust that underwent significant stretching and was heavily magmatized by large amounts of basaltic material 1,2,6,10,[12][13][14] .…”

Section: Geological Settingmentioning

confidence: 99%

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Seismic data and ancient zircons discovered on the Mendeleev Rise, Arctic Ocean, indicate continental crust

Nikishin,

Foulger,

Rodina

et al. 2023

Preprint

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The Alpha-Mendeleev Rise is located in the Amerasia Basin. The work is based on a synthesis of interpretation of regional 2D MCS seismic profiles and data from rock sampling using special underwater vehicles on the slopes of seamounts. The Rise is represented by alternation of highs (horsts) and half-grabens. At the base of the horst cover, bright reflectors are distinguished, which are interpreted as volcanics. Half-graben sections are wedge-shaped and are similar in geometry to seaward-dipping reflectors (SDRs) of continental passive volcanic margins. Rock sampling has shown that the horsts are composed of sedimentary rocks of Paleozoic age, penetrated by intrusions. Aptian-Albian sections with volcanics (basalts, trachybasalts, trachyandesites) were identified on the horsts. U/Pb dating of igneous rocks showed that typical age of rocks is 110-114 Ma. Magmatic Cretaceous rocks contain zircons with ages ranging from pre-Barremian Mesozoic to Precambrian. The presence of these ancient zircons indicates that the Alpha-Mendeleev Rise is composed of continental crust. A model of the crustal structure of the Alpha-Mendeleev Rise is proposed. The upper and lower crust is approximately 20-30% saturated with intrusions of basic composition. At the base of the crust, a high-velocity layer up to 5 km thick is distinguished.

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Section: Seismic Analysissupporting

confidence: 78%

Section: Geological Settingmentioning

confidence: 99%

Seismic data and ancient zircons discovered on the Mendeleev Rise, Arctic Ocean, indicate continental crust

Nikishin,

Foulger,

Rodina

et al. 2023

Preprint

Self Cite

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show abstract

“…In this paper, we will use data collected primarily by the Arktika-2011, Arktika-2012, and Arktika-2014 Projects. Characteristics of the seismic and other data are presented in Paper-1 (Nikishin et al, 2021a).…”

Section: Methodsmentioning

confidence: 99%

“…The Lomonosov Ridge, which separates the Eurasia and Amerasia basins, comprises a terrane associated with a continental crust. Based on plate reconstructions, the crust of the Lomonosov Ridge is formed by Paleozoic orogens (a continuation of the Caledonian, Timanian and Taimyr orogens) (Ziegler, 1988;Nikishin et al, 2021a;Knudsen et al, 2018;Miller et al, 2018b;Miller et al, 2018a;Rekant et al, 2019).…”

Section: Geological Setting and Study Areamentioning

confidence: 99%