The Pointe-du-Fort submarine mass movement likely took place at the time of the February 5th 1663 earthquake as a sidewall slope failure which generated a mudflow with a run out distance of 1070m and a final flow thickness of 10-15m resting on a slope of 1.4 degrees. The slide involved about 1.95 Mm3 of clayey sediments from an original slope of 24 degrees. The slide took place in normally consolidated sediments composed of stratified low organic Laflamme Sea clay at the base overlain by progressively more organic rich recent sediments. In situ strength testing and sampling on the tidal flat, morphological analysis and remolded strength of the debris lobe can be related to rheological tests to model the mobility of the debris. For the first time, it has been possible to link the mobility of a submarine slide with the characteristics of the sediments at the time of failure with no need to consider water content increase to explain the observed mobility.
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References
Cruden, D.M. & Varnes D.J. 1996. Landslide types and processes. In: Landslides: investigation and mitigation, Special Report 247, Transportation Research Board, pp. 36-75.
De Blasio, F.V., Elverhøi, A., Issler, D., Harbitz, C.B., Bryn, P., & Lien, R., 2005. On the dynamics of subaqueous clay rich gravity mass flows—the giant Storegga slide, Norway. Marine and Petrol eum Geology, 22: 179–186.
Elverhoi, A., Norem, H., Andersen, E.S., Dowdeswell, J.A., Fossen, I., Haflidason, H., Kenyon, N.H., Laberg, J.S., King, E.L., Sejrup, H.P., Solheim, A., & Vorren, T., 1997. On the origin and flow behavior of subaqueous slides on deep-sea fans along the Norwegian-Barents Sea continental margin. Geomarine Letters, 17: 119–125.
Hampton, M.A., 1972. The role of subaqueous debris flows in generating turbidity currents. Journal of Sedimentary Petrology, 42: 775–793.
Imran, J., Parker, G., Locat, J., & Lee, H.J., 2001. 1-D numerical model of muddy subaqueous and subaerial debris flows. ASCE Journals of Hydraulic Engineering, 127: 959–968.
Jeong, S.W., Locat, P., & Leroueil, S., 2007. Rheological properties of fine-grained sediments in modeling submarine mass movements: the role of texture. (This volume).
Locat, J., 1997. Normalized rheological behavior of fine muds and their flow properties in a pseudoplastic regime. In: Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment. Water Resources Engineering Division, ASCE, pp. 260–269.
Locat, A., 2005. Étude comparative des matériaux de la source et des débris du glissement sous-marin de Pointe-du-Fort, Fjord du Saguenay, Québec, Canada. Bachelor Thesis Project, Department of Geology and Geological Engineering, Laval University, Québec, p50.
Locat, J. & Demers, D., 1988. Viscosity, remolded strength and liquidity index relationship for high water content soils. Canadian Geotechnical Journal, 25: 799–806.
Locat, J., & Lee, H.J., 2002. Submarine landslides: advances and challenges. Canadian Geotechnical Journal, 39: 193–212.
Locat, J., & Lee, J., 2005. Subaqueous Debris Flows. Chapter 9, In: Debris-flows Hazards and Related Phenomena, Mathias and Hungr, ed., Springer, pp. 203-245.
Locat, J., Lee, H.J., Locat, P. & Imran, J. 2004. Analysis of the Palos Verdes Slide, California, and its implication for the generation of tsunamis. Marine Geology, 203: 269–280.
Locat, J., Tanaka, H., Tan, T.S., Dasari, G.R., & Lee, H., 2003a. Natural soils: geotechnical behavior and geological knowledge. Keynote In: Characterisation and Engineering Properties of Natural Soils, Tan et al. Ed., Balkema, vol. 1:3-28.
Locat, P., Locat, J., Leroueil, S., & Duchesne, M.J., 2003b. Characterisation of a submarine flow-slide at Pointe-du-Fort, Saguenay Fjord, Québec, Canada. In: Submarine mass Movements and Their Consequences, J. Locat & J. Mienert, Eds., Kluwer series on Natural and Technological Hazards, vol. 19, pp. 509-518.
Mohrig, D., Whipple, K.X., Hondzo, M., Ellis, C., & Parker, G., 1998. Hydroplaning of subaqueous debris flows. Geological Society of America Bulletin, 110: 387–394.
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Locat, J., Locat, P., Locat, A., Leroueil, S. (2007). Linking Geotechnical And Rheological Properties From Failure To Post-Failure: The Pointe-Du-Fort Slide, Saguenay Fjord, Québec. In: Lykousis, V., Sakellariou, D., Locat, J. (eds) Submarine Mass Movements and Their Consequences. Advances in Natural and Technological Hazards Research, vol 27. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6512-5_19
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