Deglaciation of the western margin of the Barents Sea Ice Sheet — A swath bathymetric and sub-bottom seismic study from the Kveithola Trough

Rebesco, Michele; Liu, Yanguang; Camerlenghi, Angelo; Winsborrow, Monica; Laberg, Jan Sverre; Caburlotto, Andrea; Diviacco, Paolo; Accettella, Daniela; Sauli, Chiara; Wardell, N.; Tomini, Isabella

doi:10.1016/j.margeo.2010.10.018

Cited by 63 publications

(36 citation statements)

References 40 publications

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“…5). This spreading flow is similar to that observed for unrestricted paleo-ice-stream fans such as in the Kveithola Trough off Svalbard (Rebesco et al, 2011).…”

Section: Inferred Ice Domes On the Continental Shelfsupporting

confidence: 80%

Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery

et al. 2015

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Abstract. We present a new seafloor map for the northern Antarctic Peninsula (AP), including swath multibeam data sets from five national programs. Our map allows for the examination and interpretation of Last Glacial Maximum (LGM) paleo-ice-flow paths developed on the seafloor from the preservation of mega-scale glacial lineations, drumlinized features, and selective linear erosion. We combine this with terrestrial observations of flow direction to place constraints on ice divides and ice domes on the AP continental shelf during the LGM time interval. The results show a flow bifurcation as ice exits the Larsen B embayment. Flow emanating off the Seal Nunataks (including Robertson Island) is directed toward the southeast, then eastward as the flow transits toward the Robertson Trough. A second, stronger "streaming flow" is directed toward the southeast, then southward as ice overflowed the tip of the Jason Peninsula to reach the southern perimeter of the embayment. Our reconstruction also refines the extent of at least five other distinct paleo-icestream systems that, in turn, serve to delineate seven broad regions where contemporaneous ice domes must have been centered on the continental shelf at LGM. Our reconstruction is more detailed than other recent compilations because we followed specific ice-flow indicators and have kept tributary flow paths parallel.

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“…5). This spreading flow is similar to that observed for unrestricted paleo-ice-stream fans such as in the Kveithola Trough off Svalbard (Rebesco et al, 2011).…”

Section: Inferred Ice Domes On the Continental Shelfsupporting

confidence: 80%

Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery

et al. 2015

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“…Caricchi et al Global and Planetary Change 160 (2018) [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] (LGM) (Pedrosa et al, 2011;Rebesco et al, 2011;Rüther et al, 2012;Bjarnadóttir et al, 2013). The E-W trough is relatively small with a length of 90 km from the shelf edge to the eastwards termination, and < 15 km wide.…”

Section: Geomorphological Setting and Climate-related Depositional Prmentioning

confidence: 99%

“…The almost flat trough axis gently dips toward the shelf edge with a stair-like topography produced by a series of transversal sediment ridges. According to Rebesco et al (2011) these ridges are grounding-zone wedges (GZWs) derived by deposition of unconsolidated, saturated subglacial till during episodic stillstands of the overall ice-stream retreat during last deglaciation. The inner area of the trough contains a complex sediment drift composed by two depocenters (Main and Minor drifts, Rebesco et al, 2016) whose onset was related to the interplay of Atlantic and Arctic waters (West and East Spitzbergen currents respectively), and brine-enriched shelf water (BSW, Aagaard et al, 1985;Fohrmann et al, 1998;Thomsen et al, 2001) produced on the shelf during winter which formation started at around 13 cal ka BP .…”

Section: Geomorphological Setting and Climate-related Depositional Prmentioning

confidence: 99%

Paleomagnetism and rock magnetism from sediments along a continental shelf-to-slope transect in the NW Barents Sea: Implications for geomagnetic and depositional changes during the past 15 thousand years

Caricchi

Lucchi

Sagnotti

et al. 2018

Global and Planetary Change

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A B S T R A C TPaleomagnetic and rock magnetic data were measured on glaciomarine silty-clay successions along an E-W sediment-core transect across the continental shelf and slope of the Kveithola paleo-ice stream system (south of Svalbard, north-western Barents Sea), representing a stratigraphic interval spanning the last deglaciation and the Holocene.The records indicate that magnetite is the main magnetic mineral and that magnetic minerals are distinctly less abundant on the shelf than at the continental slope. The paleomagnetic properties allow for the reconstruction of a well-defined characteristic remanent magnetization (ChRM) throughout the sedimentary successions. The stratigraphic trends of rock magnetic and paleomagnetic parameters are used for a shelf-slope core correlation and sediment facies analysis is applied for depositional processes reconstruction. The new paleomagnetic records compare to the PSV and RPI variation predicted for the core sites by a simulation using the global geomagnetic field variation models SHA.DIF.14k and CALS7K.2 and closest PSV and RPI regional stack curves. The elaborated dataset, corroborated by available 14 C ages, provides a fundamental chronological framework to constrain the coupling of shelf-slope sedimentary processes and environmental changes in the NW Barents Sea region during and after deglaciation.

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“…1). The glacigenic sediments in this region have been investigated mainly with the aid of two-and three-dimensional seismic data, sub-bottom profiling and/or multibeam bathymetry (Vorren & Kristoffersen 1986;Vorren et al 1990;Andreassen et al 2008;Bellec et al 2008;Ottesen et al 2008;Winsborrow et al 2010;Rebesco et al 2011;Rü ther et al 2011;Bjarnadó ttir et al 2012). The studies based on the analysis of sediment cores (Hald et al 1989;Ivanova et al 2002;Aagaard-Sørensen et al 2010;Chistyakova et al 2010;Junttila et al 2010) have focused on sites of high sedimentation rate such as the Ingøydjupet (Ingøy Deep) trough (Fig.…”

Section: Introductionmentioning

confidence: 99%

Sedimentary environments in the south-western Barents Sea during the last deglaciation and the Holocene: a case study outside the Ingøydjupet trough

Pau

Hammer

2016

Polar Research

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Deglaciation of the western margin of the Barents Sea Ice Sheet — A swath bathymetric and sub-bottom seismic study from the Kveithola Trough

Cited by 63 publications

References 40 publications

Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery

Configuration of the Northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery

Paleomagnetism and rock magnetism from sediments along a continental shelf-to-slope transect in the NW Barents Sea: Implications for geomagnetic and depositional changes during the past 15 thousand years

Sedimentary environments in the south-western Barents Sea during the last deglaciation and the Holocene: a case study outside the Ingøydjupet trough

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