Geological Structure and History of the Arctic Ocean

Петров, О. В.; Morozov, Andrey; Shokalsky, Sergey; Соболев, Н. Н.; Kashubin, Sergey; Поспелов, И. И.; Tolmacheva, T. Yu.; Petrov, E. O.

doi:10.3997/9789462821880

Cited by 33 publications

(98 citation statements)

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“…At this time, in the rest of the Eurasian Basin, the spreading rate decreased from about 23-15 mm/year [19], and continued to decrease to less than 10 mm/year until 33 Ma. An asymmetry in the seafloor basement with shallower depth to basement in the Amundsen basin compared to the conjugate Nansen basin has been first reported by Sekretov [38] and confirmed by the new Russian seismic data [31]. Depth to oceanic basement is a proxy to its age and therefore the presence of a wider area of shallow basement in the Amundsen Basin and narrower, deeper Nansen Basin could indicate asymmetry in oceanic accretion.…”

Section: Tectonic Setting Of the Eastern Eurasian Basinmentioning

confidence: 62%

“…The Podvodnikov Basin is floored by ca. 20 km thick crust (e.g., [28]), which led some authors to propose that this is entirely stretched continental crust (e.g., [31]). Other studies suggest that the basin has both oceanic and continental crust, with Jokat and Ickrath [22] suggesting that ca.…”

Section: Tectonic Setting Of the Eastern Eurasian Basinmentioning

confidence: 99%

“…Franke et al [15] and later Franke and Hinz [14] used an extended seismic dataset in the Laptev Sea and adjacent East Siberian shelf and suggested that: (1) the Laptev Sea rift system was developed east of the transfer zone which links the Gakkel Ridge to the Laptev Sea Rift, with rifting episodes somehow disconnected from the evolution of the Gakkel Ridge, and (2) the East Siberian shelf developed as an epicontinental platform that subsided independently of the Laptev Sea Rift system. A recently acquired high-resolution seismic reflection dataset led Nikishin et al [31] to suggest that the pre-Eocene system of continental grabens observed on the Lomonosov Ridge and Laptev-East Siberian seas shelves are part of a common rift system.…”

Section: Tectonic Setting Of the Eastern Eurasian Basinmentioning

confidence: 99%

“…Note the oblique orientation relative to the Gakkel Ridge of two features visible in the gravity data (labelled Ra-Ridge in the Amundsen Basin, and Rnridge in the Nansen Basin). The contour of these features and adjacent contours are shown in white in d (see review papers by [18,31,34]). It is now postulated that the oldest oceanic basin-the Canada Basin-is formed by all three types of crusts mentioned above (e.g., [32]).…”

Section: Tectonic Setting Of the Eastern Eurasian Basinmentioning

confidence: 99%

“…At the other end of the spectrum is the Eurasian Basin, which is the result of seafloor spreading, albeit an extremely slow seafloor spreading, in particular in the last 33 Ma (e.g., [8]). The Makarov Basin is a small, but very deep basin and its basement is probably partly continental (e.g., [27,31]). The Podvodnikov Basin is floored by ca.…”

Section: Tectonic Setting Of the Eastern Eurasian Basinmentioning

confidence: 99%

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Ultraslow spreading, ridge relocation and compressional events in the East Arctic region: A link to the Eurekan orogeny?

Gaina

Nikishin

Petrov³

2015

Arktos

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New and available geophysical data from the Eastern Arctic (around the Siberian tip of the Lomonosov Ridge) indicate a change in the tectonic regime at the Eocene time. Oceanic crust identified on the new seismic reflection data in the Amundsen Basin displays an asymmetric fabric also visible in the gravity and magnetic gridded data. Tentative dating of the weak magnetic anomalies suggests asymmetric spreading or ridge relocation from ca. 49 to 33 Ma. Three seismic reflection transects through the Laptev Sea, Lomonosov Ridge and adjacent basins image several compressional features, most likely initiated in the Eocene. According to a regional plate tectonic model, the Greenland plate has pushed the Lomonosov Ridge by ca. 30 mm/year from 54 to 49 Ma and by ca. 13.5 mm/year afterwards, until Early Miocene. We suggest that intraplate stresses triggered by the Eocene to Oligocene northern movement of the Greenland plate and subsequent collision with the North American plate that created the Eurekan deformation, have propagated through the Arctic region and affected part of the East Siberian Shelf, Podvodnikov Basin, Laptev Sea and modified the spreading direction in the eastern Eurasia Basin. We estimate that these changes started at the same time as the peak compressional phase in North Greenland dated 49-47 Ma and lasted until Oligocene time when the large-scale tectonic regime changed by incorporating Greenland into the North American plate.

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Section: Tectonic Setting Of the Eastern Eurasian Basinmentioning

confidence: 62%

Section: Tectonic Setting Of the Eastern Eurasian Basinmentioning

confidence: 99%

Section: Tectonic Setting Of the Eastern Eurasian Basinmentioning

confidence: 99%

Section: Tectonic Setting Of the Eastern Eurasian Basinmentioning

confidence: 99%

Section: Tectonic Setting Of the Eastern Eurasian Basinmentioning

confidence: 99%

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Ultraslow spreading, ridge relocation and compressional events in the East Arctic region: A link to the Eurekan orogeny?

Gaina

Nikishin

Petrov³

2015

Arktos

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Significance of Northeast‐Trending Features in Canada Basin, Arctic Ocean

Hutchinson

Jackson

Houseknecht

et al. 2017

Geochem Geophys Geosyst

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Synthesis of seismic velocity, potential field, and geological data from Canada Basin and its surrounding continental margins suggests that a northeast‐trending structural fabric has influenced the origin, evolution, and current tectonics of the basin. This structural fabric has a crustal origin, based on the persistence of these trends in upward continuation of total magnetic intensity data and vertical derivative analysis of free‐air gravity data. Three subparallel northeast‐trending features are described. Northwind Escarpment, bounding the east side of the Chukchi Borderland, extends ∼600 km and separates continental crust of Northwind Ridge from high‐velocity transitional crust in Canada Basin. A second, shorter northeast‐trending zone extends ∼300 km in northern Canada Basin and separates inferred continental crust of Sever Spur from magmatically intruded crust of the High Arctic Large Igneous Province. A third northeast‐trending feature, here called the Alaska‐Prince Patrick magnetic lineament (APPL) is inferred from magnetic data and its larger regional geologic setting. Analysis of these three features suggests strike slip or transtensional deformation played a role in the opening of Canada Basin. These features can be explained by initial Jurassic‐Early Cretaceous strike slip deformation (phase 1) followed in the Early Cretaceous (∼134 to ∼124 Ma) by rotation of Arctic Alaska with seafloor spreading orthogonal to the fossil spreading axis preserved in the central Canada Basin (phase 2). In this model, the Chukchi Borderland is part of Arctic Alaska.

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Arctic Continental Margins

Gaina

2022

Continental Rifted Margins 2

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Geological Structure and History of the Arctic Ocean

Cited by 33 publications

References 0 publications

Ultraslow spreading, ridge relocation and compressional events in the East Arctic region: A link to the Eurekan orogeny?

Ultraslow spreading, ridge relocation and compressional events in the East Arctic region: A link to the Eurekan orogeny?

Significance of Northeast‐Trending Features in Canada Basin, Arctic Ocean

Arctic Continental Margins

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