Controlling factors for slope instability in a seismically active region: The NW-Svalbard continental margin

Osti, Giacomo; Franek, Peter; Forwick, Matthias; Laberg, Jan Sverre

doi:10.1016/j.margeo.2017.06.005

Cited by 5 publications

(9 citation statements)

References 50 publications

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“…Volume and area comparison for Body A with other submarine slides along the Norwegian continental margin. Note: a, Safronova et al (); b, Hjelstuen et al (); C, Elger et al (); d, Laberg and Vorren (); e, Osti et al (); f, Vanneste et al () and Winkelmann et al (); g, Haflidason et al (); h, Laberg et al (); i, Laberg et al ().…”

Section: Discussionmentioning

confidence: 99%

Late Cenozoic Erosion Estimates for the Northern Barents Sea: Quantifying Glacial Sediment Input to the Arctic Ocean

Lasabuda

Geissler

Laberg

et al. 2018

Geochem Geophys Geosyst

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A compilation of seismic data has been used to characterize the Neogene‐Quaternary sedimentary succession of the northwestern Barents Sea continental margin to better understand the paleoenvironmental evolution and the sedimentary processes involved. The Neogene strata are dominated by contourites related to the ocean circulation established from the opening of the Fram Strait connecting the Atlantic and the Arctic Oceans (< ~17.5 Ma). The upper Plio‐Pleistocene strata (< ~2.7 Ma) are dominated by stacked gravity‐driven deposits forming trough‐mouth fans that were sourced from paleo‐ice streams. Within the interfan areas, contouritic sedimentation prevailed. Thus, this margin provides an example of interaction of glacigenic debris flows, contour currents, and hemipelagic/glacimarine sedimentary processes. A total of ~29,000 km3 of sediments with an average sedimentation rate of about 0.24 m/Kyr were estimated. These numbers reflect the sediment input to this part of the Arctic Ocean from the northwestern Barents Sea shelf and adjacent land areas. For the first time, the average erosion and erosion rates for this source area are estimated using a mass balance approach. Approximately 410–650 m of erosion has on average occurred, corresponding to an average erosion rate of ~0.15–0.24 m/Kyr. These rates are comparable to those reported from other glaciated margins, including the western Svalbard and mid‐Norway margin, but up to only half the rates reported from the western Barents Sea margin. This variation is interpreted due to the size and bedrock types of the drainage area, ice dynamics, and the continental slope gradient.

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Section: Discussionmentioning

confidence: 99%

Late Cenozoic Erosion Estimates for the Northern Barents Sea: Quantifying Glacial Sediment Input to the Arctic Ocean

Lasabuda

Geissler

Laberg

et al. 2018

Geochem Geophys Geosyst

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“…Evidence of multiple slope instabilities along the eastern flank of the Fram Strait have been recently documented by Elger et al [23] and Osti et al [50] and are referred to as the Fram Strait Slide Complex and Spitsbergen Fracture Zone Slide. In this study, we analyzed in detail the geometry of failures constituting the southern part of the slide complex.…”

Section: Mass Movement In Eastern Fram Straitmentioning

confidence: 96%

“…At water depths deeper than ~2500 ms, where the margin consists of a complex mix of wavy structures, moat-related features and planes of shear (Fig. 4), bathymetric data have shown clear indication of mass movement [50,23]. Here, sharp headwalls and glide planes are not evident from seismic data.…”

Section: Mass Movement In Eastern Fram Straitmentioning

confidence: 97%

“…4. The deformation along the shear planes affects the entire sedimentary succession, generating escarpment observable on the seafloor [50].…”

Section: Deep Mass Movementsmentioning

confidence: 99%

“…The increased gradient of the eastern Fram Strait slope, combined with the action of the Coriolis effect on a S-N flowing bottom current (bending the currents eastwards), generated the favorable conditions for the confinement of the current and the consequent initiation and growth of the drift [56,3,13]. In addition, the intense slope failure which has been documented to affect the region since > 5 Ma might also have contributed to the steepening of the lower continental slope [50,23].…”

Section: Onset Of Contourite Driftsmentioning

confidence: 99%

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Evolution of contourite drifts in regions of slope failures at eastern Fram Strait

Osti

Waghorn

Waage

et al. 2019

Arktos

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We thank the captain and crew of R/V Helmer Hanssen (former R/V Jan Mayen) for their excellent support during the acquisition of geophysical data. Steinar Iversen and Bjørn Runar Olsen are especially thanked for their professional technical assistance during our cruises. We thank Jürgen Mienert and Stefan Bünz for fruitful and constructive suggestions and discussion, and Sunil Vadakkepuliyambatta for the precious help during the early phases of the work. The work was supported by the Research Council of Norway through its Center of Excellence funding scheme, project number 223259.

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Gas Hydrate Related Bottom-Simulating Reflections Along the West-Svalbard Margin, Fram Strait

Plaza‐Faverola

Vadakkepuliyambatta

Singhroha

et al. 2022

World Atlas of Submarine Gas Hydrates in Continental Margins

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Controlling factors for slope instability in a seismically active region: The NW-Svalbard continental margin

Cited by 5 publications

References 50 publications

Late Cenozoic Erosion Estimates for the Northern Barents Sea: Quantifying Glacial Sediment Input to the Arctic Ocean

Late Cenozoic Erosion Estimates for the Northern Barents Sea: Quantifying Glacial Sediment Input to the Arctic Ocean

Evolution of contourite drifts in regions of slope failures at eastern Fram Strait

Gas Hydrate Related Bottom-Simulating Reflections Along the West-Svalbard Margin, Fram Strait

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