Signatures of slope failures and river-delta collapses in a perialpine lake (Lake Lucerne, Switzerland)

Hilbe, Michael; Anselmetti, Flavio (2014). Signatures of slope failures and river-delta collapses in a perialpine lake (Lake Lucerne, Switzerland). Sedimentology, 61(7), pp. 1883-1907. Blackwell Science 10.1111/sed.12120

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This is the accepted version of the following article: Signatures of slope failures and river-delta collapses in a perialpine lake (Lake Lucerne, Switzerland), which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1111/sed.12120

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Historical reports from the 17th Century document two destructive tsunamis with runups exceeding 5 m, affecting proximal basins of Lake Lucerne (Switzerland). One event in AD 1601 is coeval with a strong nearby earthquake (MW ca 5.9), which caused extensive slope failures in many parts of the lake. The second event in AD 1687 is associated with an apparently spontaneous partial collapse of the Muota river delta. This study combines high-resolution bathymetry, reflection seismic and lithological data in order to document the sedimentary and morphological signatures of the two subaqueous mass movements that probably generated the observed tsunamis. Such mass movements are significant as a common sedimentation process and as natural hazard in fjord-type lakes and similar environments. The deposits, covering large parts of the basins with thicknesses reaching >10 m, consist of two subunits: A lower ‘massflow deposit’ contains variably deformed sediments from the source areas. Its emplacement affected pre-existing sediments, incorporating thin sediment slices into the deposit and increasing its volume. Deep-reaching deformation near This is an Accepted Article that has been peer-reviewed and approved for publication in the Sedimentology, but has yet to undergo copy-editing and proof correction.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR)
08 Faculty of Science > Institute of Geological Sciences
08 Faculty of Science > Institute of Geological Sciences > Quaternary Geology

UniBE Contributor:

Hilbe, Michael and Anselmetti, Flavio

Subjects:

500 Science > 550 Earth sciences & geology

ISSN:

0037-0746

Publisher:

Blackwell Science

Language:

English

Submitter:

Flavio Anselmetti

Date Deposited:

25 Sep 2014 14:45

Last Modified:

31 Dec 2015 02:30

Publisher DOI:

10.1111/sed.12120

BORIS DOI:

10.7892/boris.47440

URI:

https://boris.unibe.ch/id/eprint/47440

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