Physics – Geophysics
Scientific paper
Apr 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3407607s&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 7, CiteID L07607
Physics
Geophysics
5
Hydrology: Debris Flow And Landslides, Marine Geology And Geophysics: Continental Shelf And Slope Processes (4219), Marine Geology And Geophysics: Marine Hydrogeology, Marine Geology And Geophysics: Submarine Landslides, Mineralogy And Petrology: Instruments And Techniques
Scientific paper
Mineralogical composition and pore fluid pressure are the crucial controls for mechanical stability of water-saturated sediments. Their in situ measurements were undertaken in earthquake-triggered slope deposits in Lake Lucerne (Switzerland) in addition to geophysical characterization and laboratory index properties, shear and consolidation experiments on core. Two lithological units were identified: A weak, lightly underconsolidated section of postglacial silty clays overlies overconsolidated fine-grained glacial deposits with coarser components and excess fluid pressure (ca. 2.5× higher than in the hanging wall clay). In the event of an earthquake, hydrofracturing in the overconsolidated section facilitates an upward pore pressure pulse to the base of the softer, less stable unit. Here, excess pore pressure initiates sliding along a failure plane at the lithological boundary, causing the entire postglacial sedimentary section to slip downslope. We propose that many submarine landslides at active and passive continental margins may follow this mechanism of pore pressure-induced failure.
Anselmetti Flavio
Kopf Achim
Stegmann Sylvia
Strasser Michael
No associations
LandOfFree
Geotechnical in situ characterization of subaquatic slopes: The role of pore pressure transients versus frictional strength in landslide initiation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Geotechnical in situ characterization of subaquatic slopes: The role of pore pressure transients versus frictional strength in landslide initiation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Geotechnical in situ characterization of subaquatic slopes: The role of pore pressure transients versus frictional strength in landslide initiation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1080723