Seabed morphology and shallow sedimentary structure of the Storfjorden and Kveithola trough-mouth fans (North West Barents Sea)

Seabed morphology and shallow sedimentary structure of the Storfjorden and Kveithola trough-mouth fans (North West Barents Sea)

17 pages, 13 figures, 2 tables

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Bibliographic Details
Main Authors: Pedrosa-González, María Teresa, Camerlenghi, Angelo, De Mol, Ben, Urgeles, Roger, Rebesco, Michele, Lucchi, Renata G.
Format: artículo biblioteca
Language:English
Published: Elsevier 2011-08
Subjects:Barents Sea, Svalbard, Storfjorden, Paleo-ice streams, Glacial Maximum, Deglaciation,
Online Access:http://hdl.handle.net/10261/45134
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spelling dig-icm-es-10261-451342022-12-12T11:58:41Z Seabed morphology and shallow sedimentary structure of the Storfjorden and Kveithola trough-mouth fans (North West Barents Sea) Pedrosa-González, María Teresa Camerlenghi, Angelo De Mol, Ben Urgeles, Roger Rebesco, Michele Lucchi, Renata G. Barents Sea Svalbard Storfjorden Paleo-ice streams Glacial Maximum Deglaciation 17 pages, 13 figures, 2 tables This study aims to present an overview of the seafloor morphology and shallow sedimentary structure of the Storfjorden and Kveithola Trough Mouth Fans (TMFs) on the northwestern Barents Sea continental margin. Data have been compiled from two International Polar Year (IPY) cruises (SVAIS, of the BIO Hespérides and EGLACOM of the R/V OGS-Explora) that yielded 15,340 km2 of multi-beam bathymetry and 9500 km of sub-bottom seismic profiles. In this area, the continental shelf edge defines three wide and subdued sedimentary lobes forming Storfjorden TMF, one single lobe on Kveithola TMF, and three inter-TMF areas on the continental slope. The two northernmost lobes of Storfjorden TMF (Lobes I and II) are composed by thick (up to 50 m) sequences of glacially derived debris flow deposits interbedded with thin a few metres de-glacial and interglacial deposits. A network of upper slope gullies incises these debris flow deposits as a consequence of subglacial meltwater release at or near the shelf break. Gullies evolve into channels whose morphologic evidence disappears midslope, leaving place to a subdued chevron-like morphological pattern inherited by the preceeding glacial maximum debris flow deposits. A drastic change occurs on the continental slope of Storfjorden TMF Lobe III and Kveithola TMF, where are several translational submarine landslides mostly originated in the upper slope, the majority of which detach at the contact between Middle Weishelian glacigenic debris flows and the overlying acoustically laminated plumites. Dendritic canyon systems only develop in inter-TMF areas. The data suggest that TMF continental slope progradation depends on short-lived episodes of extreme sedimentation during glacial maxima and during the early deglaciation phase, and that an important controlling factor is the mechanism of ice stream retreat from the continental shelf edge. We suggest that the two northern Storfjorden sub-ice streams were composed of thicker and perhaps faster ice progressively draining a distal and larger ice source mainly located on Svalbard. Conversely, the southernmost Storfjorden sub-ice stream and the Kveithola ice stream were fed by a local, smaller marine-based ice dome grounded on Spitsbergenbanken. The ice dome persisted after the LGM, maintaining a local ice drainage system close to the shelf edge whose sedimentary evidence can be found on the continental slope of the southern lobe of Storfjorden TMF and Kveithola TMF. The high degree of lateral variability in the style of sedimentation on TMF slopes suggests that ice stream dynamics may vary considerably within the same glacial trough, and that such variability affects the long-term development of the architecture of TMFs This study has been supported by Spanish IPY projects SVAIS (POL2006-07390/CGL) and IPY-NICE STREAMS (CTM2009-06370-E/ANT), and by OGS IPY Project EGLACOM. We acknowledge support by “Generalitat de Catalunya” through excellence research group (GRC Geociencies Marines) grants (refs. 2009SGR1305 and 2009SGR146) and within the Program CONSOLIDER-INGENIO 2007 (GRACCIE) Peer reviewed 2012-02-03T12:06:09Z 2012-02-03T12:06:09Z 2011-08 artículo http://purl.org/coar/resource_type/c_6501 Marine Geology 286(1-4): 65-81 (2011) 0025-3227 http://hdl.handle.net/10261/45134 10.1016/j.margeo.2011.05.009 en https://doi.org/10.1016/j.margeo.2011.05.009 open Elsevier
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
language English
topic Barents Sea
Svalbard
Storfjorden
Paleo-ice streams
Glacial Maximum
Deglaciation
Barents Sea
Svalbard
Storfjorden
Paleo-ice streams
Glacial Maximum
Deglaciation
spellingShingle Barents Sea
Svalbard
Storfjorden
Paleo-ice streams
Glacial Maximum
Deglaciation
Barents Sea
Svalbard
Storfjorden
Paleo-ice streams
Glacial Maximum
Deglaciation
Pedrosa-González, María Teresa
Camerlenghi, Angelo
De Mol, Ben
Urgeles, Roger
Rebesco, Michele
Lucchi, Renata G.
Seabed morphology and shallow sedimentary structure of the Storfjorden and Kveithola trough-mouth fans (North West Barents Sea)
description 17 pages, 13 figures, 2 tables
format artículo
topic_facet Barents Sea
Svalbard
Storfjorden
Paleo-ice streams
Glacial Maximum
Deglaciation
author Pedrosa-González, María Teresa
Camerlenghi, Angelo
De Mol, Ben
Urgeles, Roger
Rebesco, Michele
Lucchi, Renata G.
author_facet Pedrosa-González, María Teresa
Camerlenghi, Angelo
De Mol, Ben
Urgeles, Roger
Rebesco, Michele
Lucchi, Renata G.
author_sort Pedrosa-González, María Teresa
title Seabed morphology and shallow sedimentary structure of the Storfjorden and Kveithola trough-mouth fans (North West Barents Sea)
title_short Seabed morphology and shallow sedimentary structure of the Storfjorden and Kveithola trough-mouth fans (North West Barents Sea)
title_full Seabed morphology and shallow sedimentary structure of the Storfjorden and Kveithola trough-mouth fans (North West Barents Sea)
title_fullStr Seabed morphology and shallow sedimentary structure of the Storfjorden and Kveithola trough-mouth fans (North West Barents Sea)
title_full_unstemmed Seabed morphology and shallow sedimentary structure of the Storfjorden and Kveithola trough-mouth fans (North West Barents Sea)
title_sort seabed morphology and shallow sedimentary structure of the storfjorden and kveithola trough-mouth fans (north west barents sea)
publisher Elsevier
publishDate 2011-08
url http://hdl.handle.net/10261/45134
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