The results of deep seismic investigations on geotraverse in the Barents Sea from Kola peninsula to Franz-Joseph Land

Sakoulina, T.S.; Telegin, A.N.; Tikhonova, I.M.; Verba, M. L.; Matveev, Yu. I.; Vinnick, A.A.; Kopylova, A.V.; Dvornikov, L.G.

doi:10.1016/s0040-1951(00)00201-8

Cited by 17 publications

(3 citation statements)

References 2 publications

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“…They supposedly formed in middlelate Devonian, probably as a result of back-arc lithospheric extension, and have remained the principal depocenters ever since. As shown by the seismic refraction data [57,58,135] and results of crustal modeling [94], these basins, in their deepest parts, may be floored by exhumed mantle and/ or old oceanic lithosphere.…”

Section: High C H U K O Tk a F O Ld B E Lt M A K A Ro V -P O D V O D mentioning

confidence: 99%

Fold belts and sedimentary basins of the Eurasian Arctic

Drachev¹

2016

Arktos

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The vast Eurasian Arctic epicontinental shelf and adjoining mainland has a very complex structure and tectonic history as a result of a series of continent-continent collisions, accretion of terranes and crustal extension phases during Neoproterozoic and Phanerozoic times. Significant parts of major Eurasian fold belts extend far north into the Arctic below thick infill of post-orogenic sedimentary basins, where their architecture remains highly disputed. Large Eurasian Arctic sedimentary basins formed as a result of orogenic collapse, back-arc extension, or intracontinental extension associated with the breakup of the Laurussia, Laurasia, Pangea and Eurasia supercontinents. There are over 40 sedimentary basins of variable age and genesis which are thought to bear significant undiscovered hydrocarbon resources in the region. This article reviews the current state-of-knowledge of Eurasian Arctic tectonics and highlights questions that remain to be addressed. The overall focus is on the Russian sector of the Arctic being less known to a broad geoscience community.

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Section: High C H U K O Tk a F O Ld B E Lt M A K A Ro V -P O D V O D mentioning

confidence: 99%

Fold belts and sedimentary basins of the Eurasian Arctic

Drachev¹

2016

Arktos

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“…The investigated region coincides with the area separating the Barents shelf into its western and eastern parts with significantly different basin architecture and evolution. Earlier studies of the deep crustal structure have been reported on the Norwegian side (Breivik et al 2003(Breivik et al , 2005Clark et al 2013;Gernigon et al 2014), as well as on the Russian side (Sakoulina et al 2000;Roslov et al 2009;Ivanova et al 2011). Regional 3-D lithospheric models covering the wider Barents-Kara Sea area have also been constructed Hauser et al 2011;Klitzke et al 2015).…”

Section: Introductionmentioning

confidence: 99%

The crustal structure in the transition zone between the western and eastern Barents Sea

Shulgin

Mjelde

Faleide

et al. 2018

Geophysical Journal International

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We present a crustal-scale seismic profile in the Barents Sea based on new data. Wide-angle seismic data were recorded along a 600 km long profile at 38 ocean bottom seismometer and 52 onshore station locations. The modelling uses the joint refraction/reflection tomography approach where co-located multichannel seismic reflection data constrain the sedimentary structure. Further, forward gravity modelling is based on the seismic model. We also calculate net regional erosion based on the calculated shallow velocity structure. Our model reveals a complex crustal structure of the Baltic Shield to Barents shelf transition zone, as well as strong structural variability on the shelf itself. We document large volumes of pre-Carboniferous sedimentary strata in the transition zone which reach a total thickness of 10 km. A high-velocity crustal domain found below the Varanger Peninsula likely represents an independent crustal block. Large lower crustal bodies with very high velocity and density below the Varanger Peninsula and the Fedynsky High are interpreted as underplated material that may have fed mafic dykes in the Devonian. We speculate that these lower crustal bodies are linked to the Devonian rifting processes in the East European Craton, or belonging to the integral part of the Timanides, as observed onshore in the Pechora Basin.

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“…The results of these studies have been published mainly based on CMP data (Ivanova et al, 2006(Ivanova et al, , 2011Matveev et al, 2005;Roslov et al, 2009;Sakoulina et al, 2000Sakoulina et al, , 2003Sakoulina et al, , 2009Structure..., 2005;Verba et al, 2001). These studies have shown that the crust of the Barents-Kara Shelf is typical continental crust with a thickness of 30 to 45 km.…”

Section: Introductionmentioning

confidence: 99%

Structure of the Earth’s crust in the northern part of the Barents–Kara region along the 4-AR DSS profile

Sakoulina¹,

Pavlenkova

Kashubin

2015

Russian Geology and Geophysics

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The 1370 km long 4-AR reference profile crosses the North Barents Basin, the northern end of the Novaya Zemlya Rise, and the North Kara Basin. Integrated geophysical studies including common deep point (CDP) survey and deep seismic sounding (DSS) were carried out along the profiles. The DSS was performed using autonomous bottom seismic stations (ABSS) spaced 10-20 km apart and a powerful air gun producing seismic signals with a step size of 250 m. As a result, detailed P-and S-wave velocity structures of the crust and upper mantle were studied. The basic method was ray-tracing modeling. The Earth's crust along the entire profile is typically continental with compressional wave velocities of 5.8-7.2 km/s in the consolidated part. Crustal thickness increases from 30 km near the islands of Franz Josef Land to 35 km beneath the North Barents Basin, 50 km beneath the Novaya Zemlya Rise, and 40 km beneath the North Kara Basin. The North Barents Basin 15 km deep is characterized by unusually low velocities in the consolidated crust: The upper crust layer with velocities of 5.8-6.4 km/s has a thickness of about 15 km beneath the basin (usually, this layer wedges beneath deep sedimentary basins). Another special property of the crust in the North Barents Basin is the destroyed structure of the Moho.

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The results of deep seismic investigations on geotraverse in the Barents Sea from Kola peninsula to Franz-Joseph Land

Cited by 17 publications

References 2 publications

Fold belts and sedimentary basins of the Eurasian Arctic

Fold belts and sedimentary basins of the Eurasian Arctic

The crustal structure in the transition zone between the western and eastern Barents Sea

Structure of the Earth’s crust in the northern part of the Barents–Kara region along the 4-AR DSS profile

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