Lake floor morphology and sediment architecture of Lake Torneträsk, Northern Sweden

Auteur(s) et Affiliation(s)

Climate Impacts Research Centre, Univ., Umeå, Suede
Inst. of Geology and Mineralogy, Univ., Köln, Allemagne
Inst. of Geological Sciences, Univ., Bern, Suisse
Inst. of Geology and Mineralogy, Univ., Köln, Allemagne
Climate Impacts Research Centre, Univ., Umeå, Suede

Description :
The AA. present datasets from a hydroacoustic survey in July 2011 at Lake Torneträsk, northern Sweden. These hydroacoustic data exhibit lake floor morphologies formed by glacial erosion and accumulation processes, insights into lacustrine sediment accumulation since the beginning of deglaciation, and information on seismic activity along the Pärvie Fault. The AA. assume that lack of sediment deposition in the lake is a result of different factors, including low rates of erosion in the catchment, a previously high lake level leading to deposition of sediments in higher elevated paleodeltas, tributaries carrying low suspension loads as a result of sedimentation in upstream lakes, and an overall low productivity in the lake. A clear off-shore trace of the Pärvie Fault could not be detected from the hydroacoustic data. However, an absence of sediment disturbance in close proximity to the presumed fault trace implies minimal seismic activity since deposition of the glaciolacustrine and lacustrine sediments.

Type de document :
Article de périodique

Source :
Geografiska annaler. Series A. Physical geography, issn : 0435-3676, 2013, vol. 95, n°. 2, p. 159-170, nombre de pages : 12, Références bibliographiques : 2 p.

Date :

Editeur :
Pays édition : Suede, Stockholm, Svenska sällskapet för antropologi och geografi

Langue :
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