Abstract
Downhole shear-strength profiles, obtained from cone-penetrometer and lab tests were tied to sedimentary facies from adjacent continuous cores. The geotechnical response of mass-transport deposits was investigated. In the Campos Basin, sediments have evacuated from the upper continental slope and have accumulated as folded deposits on the middle slope. Sediment removal is recognised by an abrupt step-like change in shear-strength at the level of the unconformity. The folded deposits are characterised by a belly-shaped increase in shear-strength coinciding with a zone of intense lamination within the deposit, induced by internal shearing and fluid loss (strain hardening). In contrast, highly disintegrated muddy debris-flow deposits are indistinguishable, in terms of shear-strength, from normal hemipelagic slope sediments.
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References
Caddah, L.F., Kowsmann, R. O., Viana, A. R. 1994. Laminação secundária em sedimentos escorregados: urn exemplo do Pleistocene da Bacia de Campos. Bol. Geociências da Petrobrás,.8, (2/4): 421–427.
Caddah, L.F., Kowsmann, R.O., Viana, A.R., 1998. Slope sedimentary facies associated with Pleistocene and Holocene sea-level changes, Campos Basin, Southeast Brazilian margin. Sedimentary Geology 115: 159–174.
Castro, D.D., Rizzo, J.G., Heinerici, J., Caddah, L.F.G., 1995. Geometry of five submarine slump complexes, Campos Basin, Brazil. 4°Congresso Internacional de Geofisica, Rio de Janeiro, Anais, p. 615–618.
Damuth, J.E., 1980. Use of high-frequency (3.5-12 kHz) echograms in the study of near-bottom sedimentation processes in the deep-sea: a review. Marine Geology, 38: 51–75.
Ericson, C., Wollin, G., 1968. Pleistocene climates and chronology in deep-sea sediments. Science, 16 (3859): 1227–1234.
Farrel, S.G., Eaton, S., 1987. Slump strain in the Tertiary of Cyprus and the Spanish Pyrenees: definition of paleoslopes and models of soft-sediment deformation. In: Jones, M.E., Preston, R.M.F. (Eds) Deformation of Sediments and Sedimentary Rocks. Geological Society Special Publication, 29: 181–196.
Gorini, M.A., Maldonado, P. R., Silva, C.G., Souza, E.A., Bastos, A.C., 1998. Evaluation of deep water submarine hazards at Campos Basin, Brazil. OTC 86944, p. 133–1141.
Imbrie, J., 1985. A theoretical framework for the Pleistocene ice ages. Geological Society of London Journal, 142:417–432.
Kowsmann, R.O., Viana, A.R., 1992. Movimentos de massa provocados por cunhas progradantes de nívelde mar baixo: exemplo na Bacia de Campos. Bol. Geociências da Petrobrás, 6 (1/2): 99–102.
Kowsmann, R.O., Schreiner, S., Murakami, C.Y., Piauilino, P.O., Barrocas, S., Miller, D., Rizzo, J.G.,1996a. Ecofácies de 3,5 kHz do talude da Bacia de Campos e do Plato de S. Paulo adjacente. 39° Congresso Brasileiro de Geologia, Salvador, Anais v.3, p.463–465.
Kowsmann, R.O., Voelker, H.E., Magalhães, J.L.C., 1996b. Análise sedimentológica de testemunhos apistão do talude da Bacia de Campos e Plato de S. Paulo adjacente. Relatório técnico no 006/96, Petrobras/E&P-BC/Gexp/Gelab, 46p.
Kowsmann, R.O., Machado L.C.R., Viana, A.R., Almeida Jr., W., Vicalvi, M.A., 2002. Controls on mass-wasting in deep water of the Campos Basin. OTC 14030, 11p.
Machado, L.C., 2001. Sonar characterisation of modern subaqueous mass-movement deposits bordering the Brazilian continental slope. 7th Intern. Cong, of the Brazil. Geophys. Soc, Salvador, Expanded Abstract. SBGf.
Magalhães, J.L.C., Andrade, S.B., 1999. Análise sedimentologica dos furos geológicos GL-20, GL-22, GL-23, GL-25, GL-27, GL-28, talude quaternário da Bacia de Campos e Platô de São Paulo adjacente. Macae E&P-BC/GEXP/GELAB Relatório técnico 004/99, 19p.
Vicalvi, M.A., 1997. Zoneamento bioestratigráfico e paleoclimático dos sedimentos do Quaternário superior do talude da Bacia de Campos, R.J. Brasil. Boletim de Geociencias da Petrobras, 11,(1/2) CD-ROM.
Vicalvi, M.A., 2001. Bioestratigrafia do furo geológico GL-25 (Talude de Barracuda). CT-BPA 079/01,47p.
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Kowsmann, R.O., Da Costa, A.M., Amaral, C.S. (2003). Shear-Strength Signatures of Mass Movements, Continental Slope of Campos Basin, Brazil. In: Locat, J., Mienert, J., Boisvert, L. (eds) Submarine Mass Movements and Their Consequences. Advances in Natural and Technological Hazards Research, vol 19. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0093-2_27
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DOI: https://doi.org/10.1007/978-94-010-0093-2_27
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