ORBi: Charlet F. - Sedimentary dynamics on isolated highs in Lake Baikal: evidence from detailed high-resolution geophysical data and sediment cores

Reference : Sedimentary dynamics on isolated highs in Lake Baikal: evidence from detailed high-resol...


	Document type :	Scientific journals : Article
	Discipline(s) :	Life sciences : Environmental sciences & ecology Physical, chemical, mathematical & earth Sciences : Multidisciplinary, general & others Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
	To cite this reference:	http://hdl.handle.net/2268/14958

Title :	Sedimentary dynamics on isolated highs in Lake Baikal: evidence from detailed high-resolution geophysical data and sediment cores
Language :	English
Author, co-author :	Charlet, F. [> > > >]
	Fagel, Nathalie [Université de Liège - ULg > Département de géologie > Argiles, géochimie et environnements sédimentaires >]
	De Batist, M. [> > > >]
	Hauregard, F. [> > > >]
	Minnebo, B. [> > > >]
	Meischner, D. [> > > >]
Publication date :	2005
Journal title :	Global and Planetary Change
Publisher :	Elsevier Science
Volume :	46
Issue/season :	1-4
Pages :	125-144
Peer reviewed :	Yes (verified by ORBi)
Audience :	International
ISSN :	0921-8181
City :	Amsterdam
Country :	The Netherlands
Keywords :	[en] Lake Baikal ; sedimentation ; reflection seismics ; side-scan sonar
Abstract :	[en] High- and very-high-resolution seismic data, side-scan sonar mosaics and piston cores from three isolated highs in Lake Baikal (Vydrino Shoulder, Posolsky Bank, Continent Ridge) have allowed to document in unprecedented detail the depositional, re-depositional and tectonic processes and to characterise the overall sedimentary environment on such isolated highs. Our data show that Vydrino Shoulder actually represents a turbidity- or underflow-sourced slope fan, with a distinct channel-levee morphology, and affected by tectonics and stratigraphic unconformities. Sediment cores contain up to 90% of terrigenous material. Posolsky Bank is a major tilted fault block, clearly affected by tectonic activity, by stratigraphic unconformities and by mass wasting along its margins. Sedimentation on its crest is undisturbed, but average sedimentation rates are high due to the influence of the nearby Selenga River. Continent Ridge is also affected by active faulting, stratigraphic unconformities and by mass-wasting along its flanks. The area receives only 30% of terrigenous input. There are no signs of sediment reworking due to bottom-currents. Our study thus shows that in comparison with other environments in Lake Baikal, the isolated highs probably hold the best potential to contain a high-quality, continuous, undisturbed and undiluted sedimentary record suitable for paleoclimate research. (C) 2004 Elsevier B.V. All rights reserved.
Funders :	Commission européenne : Direction générale de la Recherche ; Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Name of the research project :	Continent
Target :	Researchers
Permalink :	http://hdl.handle.net/2268/14958
DOI :	10.1016/j.gloplacha.2004.11.009
Other URL :	http://www.elsevier.com/wps/find/journaldescription.cws_home/503335/description
Commentary :	The Authors thank Elsevier for their authorization.

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Open access	GPC05 FC baikal sismique litho.pdf	No commentary	Author postprint	2.28 MB	View/Open

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