Large-scale mass wasting on the north Spitsbergen continental margin, Arctic Ocean

Cherkis, Norman Z.; Max, M. D.; Vogt, Peter R.; Crane, Kathleen; Midthassel, A.; Sundvor, Eirik

doi:10.1007/s003670050100

Cited by 27 publications

(34 citation statements)

References 30 publications

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“…5). The slide scarps extend down-slope from water depths of 160 m to more than 2000 m. Approximately 220 km 3 of sediments were removed in front of the Hinlopen Strait (Cherkis et al 1999). The seismic and the bathymetry data suggest that the slide scar is not a recent structure.…”

Section: N T E R P R E Tat I O N a N D Discussionmentioning

confidence: 93%

“…10b). Bathymetry data obtained by Cherkis et al (1999) show deeply incised canyons along the continental margin. These authors reported the existence of a large-scale mass wasting along the continental margin in front of Hinlopen Strait.…”

Section: N T E R P R E Tat I O N a N D Discussionmentioning

confidence: 99%

“…5), with a prominent slump scarp on the continental slope. Cherkis et al (1999) described in detail this region of massive slumping, probably late Quaternary in age, on the basis of sidescan sonar data.…”

Section: Norskebankenmentioning

confidence: 99%

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A geophysical study of the northern Svalbard continental margin

Geissler

Jokat

2004

Geophysical Journal International

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S U M M A R YIn the summer of 1999, the first systematic seismic profiles were acquired across the northern Svalbard continental margin east of 15• E. Approximately 1470 km of multi-channel seismic reflection data as well as sonobuoy wide-angle data were collected up to 82• N. With few exceptions the signals imaged the whole sedimentary cover down to the acoustic basement. The uppermost sedimentary deposits of the inner shelf yield P-wave velocities of 2 km s −1 and higher, indicating erosion and compaction due to a former ice load. The inner shelf east of Hinlopen Strait has only a thin veneer of over-consolidated sediments above the acoustic basement. Beneath the outer shelf, up to 3.5 km of sedimentary deposits cover the down-faulted acoustic basement. The continental slope is heavily eroded due to bottom current activity and slumping. At about 30• E the morphology of the continental slope has a smooth appearance. Shelf progradation only in the vicinity of glacial troughs crossing the shelf (associated with submarine fans) indicates main sediment transport by ice streams during former glacial periods. The maximum sedimentary thickness in the Sophia Basin is more than 9 km, and the Nansen Basin has a sediment thickness of 4.5 km close to the margin. Gravity modelling along the seismic profiles was performed to constrain the position of the continent-ocean transition. Existing sedimentary thickness and structural maps were extended over the area investigated. The new data provide no evidence for the presence of former extensive subaerial volcanic sequences (seaward-dipping reflectors), which would have been emplaced during the break-up along the margin. Thus, we consider this part of the margin as non-volcanic.

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Section: N T E R P R E Tat I O N a N D Discussionmentioning

confidence: 93%

Section: N T E R P R E Tat I O N a N D Discussionmentioning

confidence: 99%

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A geophysical study of the northern Svalbard continental margin

Geissler

Jokat

2004

Geophysical Journal International

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“…1) has first been described by Cherkis et al (1999). The slide has been referred to as the Yermak Slide, according to its position adjacent to the Yermak Plateau (Winkelmann et al, 2004;Vanneste et al, 2005b;Winkelmann et al, 2005Winkelmann et al, , 2006a, as Arctic Slide , as Hinlopen Slide according to its position at the termination of the Hinlopen Strait cross-shelf trough (Vanneste et al, 2006), or sometimes as Malene Bukta or Malene Slide according to the submarine embayment of its evacuation area Haflidason et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…The termination of the Hinlopen Trough is characterised by a number of submarine embayments and slope escarpments. Cherkis et al (1999) first mapped this headwall area and postulated a huge mass-wasting event with large rafted blocks within the Sophia Basin. Its true extent and a first calculation of its volume as well as first indication of its age of around 30 cal.…”

Section: Introductionmentioning

confidence: 99%