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

doi:10.1016/j.margeo.2010.10.018

	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 1; Liu, Yanguang 1,4; Camerlenghi, Angelo 2; Winsborrow, Monica 3; Laberg, Jan Sverre 3; Caburlotto, Andrea 1; Diviacco, Paolo 1; Accettella, Daniela 1; Sauli, Chiara 1; Wardell, Nigel 1
刊名	MARINE GEOLOGY
	2011-01-15
卷号	279 期号:1-4 页码:141-147
关键词	deglaciation ice stream mega-scale glacial lineation grounding-zone wedge Barents Sea
ISSN号	0025-3227
DOI	10.1016/j.margeo.2010.10.018
英文摘要	Kveithola Trough, an E-W trending glacial trough in the NW Barents Sea, was surveyed for the first time during the EGLACOM cruise of R/V OGS-Explora in summer 2008. Swath bathymetry shows that the seafloor is characterized by E-W trending mega-scale glacial lineations (MSGL) that record a fast flowing ice stream draining the Svalbard/Barents Sea Ice Sheet (SBIS) during the Last Glacial Maximum (LGM). MSGL are overprinted by transverse sediment ridges about 15 km apart which give rise to a staircase axial profile of the trough. Such transverse ridges are interpreted to be grounding-zone wedges (GZWs) formed by deposition of subglacial till during episodic ice stream retreat. Sub-bottom (CHIRP) and multi-channel reflection seismic data show that the present-day morphology is largely inherited from the palaeo-seafloor topography at the time of deposition of the transverse ridges, overlain by a draping glaciomarine unit which in places is over 15 m thick. Our data allow the reconstruction of depositional processes which accompanied deglaciation of the Spitsbergen Bank area. The sedimentary drape deposited on top of the GZWs is suggested to have accumulated at a very high rate, (on average in the order of 1-1.5 m ka(-1)) and therefore may potentially preserve a high-resolution palaeoclimatic record of deglaciation and post-glacial conditions in this sector of the Barents Sea. (C) 2010 Elsevier B.V. All rights reserved.
资助项目	Generalitat de Catalunya[2009SGR1305]
WOS关键词	POLAR NORTH-ATLANTIC ; SCALE GLACIAL LINEATIONS ; CONTINENTAL-SHELF ; LAST GLACIATION ; YOUNGER DRYAS ; YR BP ; SVALBARD ; STREAM ; LANDFORMS ; DYNAMICS
WOS研究方向	Geology ; Oceanography
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000287057800011
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/25921]
专题	自然资源部第一海洋研究所
通讯作者	Rebesco, Michele
作者单位	1.Ist Nazl Oceanog & Geofis Sperimentale OGS, I-34010 Sgonico, TS, Italy 2.Univ Barcelona, GRC Geociencies Marines, ICREA, E-08028 Barcelona, Spain 3.Univ Tromso, Dept Geol, N-9037 Tromso, Norway 4.State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China
推荐引用方式 GB/T 7714	Rebesco, Michele,Liu, Yanguang,Camerlenghi, Angelo,et al. Deglaciation of the western margin of the Barents Sea Ice Sheet - A swath bathymetric and sub-bottom seismic study from the Kveithola Trough[J]. MARINE GEOLOGY,2011,279(1-4):141-147.
APA	Rebesco, Michele.,Liu, Yanguang.,Camerlenghi, Angelo.,Winsborrow, Monica.,Laberg, Jan Sverre.,...&Tomini, Isabella.(2011).Deglaciation of the western margin of the Barents Sea Ice Sheet - A swath bathymetric and sub-bottom seismic study from the Kveithola Trough.MARINE GEOLOGY,279(1-4),141-147.
MLA	Rebesco, Michele,et al."Deglaciation of the western margin of the Barents Sea Ice Sheet - A swath bathymetric and sub-bottom seismic study from the Kveithola Trough".MARINE GEOLOGY 279.1-4(2011):141-147.