Abstract
Recent analysis of multi-channel seismic data provides new evidence that mass-transport deposits have been recurrent elements in the Foz do Amazonas Basin during the Middle-Miocene to Recent. In regions located to the NW and SE of the Amazon Deep-sea Fan, mass movement processes remobilized thick siliciclastic series (up to 1,000 m) as huge megaslide deposits over areas up to 90,000 km2. The Pará-Maranhão Megaslide in the SE shows a displaced block (>104 km2) in association with large mass transport deposits covering an area of more than 105 km2. These deposits are distally bounded by thrust faults, which propagate upwards eventually offsetting the sea floor. In addition, NW of the deep-sea fan, the Amapá Megaslide Complex presents a series of recurrent megaslides in the stratigraphic succession, bounded by listric normal faults and tear zones on the upper slope. Associated remobilized deposits extend from more than 300 km downslope, partially involving the upper channel-levee units of the Amazon Deep-sea Fan.
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References
Araújo EFS (2008) Processos de instabilidade gravitacional multiescala na bacia da Foz do Amazonas: depósitos de transporte de massa e megadeslizamentos. M.Sc. Dissertation, Universidade Federal Fluminense, Brazil
Brandão JASL, Feijó FJ (1994) Bacia da Foz do Amazonas. Bol Geoc Petrobras 8: 91–99
Bryn P, Berg K, Forsberg CF, Solheim A et al. (2005) Explaining the Storegga Slide. Mar Pet Geol 22: 11–19
Cobbold PR, Mourgues K, Boyd K (2004) Mechanism of thin-skinned detachment in the Amazon Fan: assessing the importance of fluid overpressure and hydrocarbon generation. Mar Pet Geol 21: 1013–1025
Damuth JE, Embley RW (1981) Mass-transport processes on the Amazon Cone: western equatorial Atlantic. Am Assoc Pet Geol Bull 65: 629–643
Damuth J, Kowsmann RO, Flood RD, Belderson RH, Gorini MA (1983) Age relationships of distributary channels on Amazon deep-sea fan: implications for fan growth pattern. Geology 11: 470–473
Damuth JE, Flood RD, Kowsmann RO, Belderson RH, Gorini MA (1988) Anatomy and growth pattern of Amazon deep-sea fan as revealed by long-range side-scan sonar (GLORIA) and high resolution seismic studies. Am Assoc Pet Geol Bull 72: 885–911
Da Silva RJP (2008) Colapso gravitacional e estruturação da seção marinha da bacia da Foz do Amazonas no contexto de múltiplos níveis de destacamento. M.Sc. Dissertation, Universidade Federal Fluminense, Brazil
Figueiredo JJP, Zalán P V, Soares EF (2007) Bacia da Foz do Amazonas. Boletim de Geociências da. Petrobras 15 n2: 299–309
Flood RD, Piper DJW (1997) Amazon Fan sedimentation: the relationship to equatorial climate change, continental denudation, and sea-level fluctuations. Proc Ocean Drill Prog, Sci Res doi:10.2973/odp.proc.sr.155.246.1997
Hoorn C, Guerrero J, Sarmiento GA, Lorente MA (1995) Andean tectonics as a cause for changing drainage patterns in Miocene, northern South America. Geology 23: 237–240
Maslin M, Mikkelsen N (1997) Amazon Fan mass-transport deposits and underlying interglacial deposits: age estimates and fan dynamics. Proc Ocean Drill Prog, Sci Res doi:10.2973/odp. proc.sr. 155.220.1997
Maslin M, Vilela C, Mikkelsen N, Grootes P (2005) Causes of catastrophic sediment failures of the Amazon Fan. Quat Sci Rev 24: 2180–2193
Mikkelsen N, Maslin MA, Giraudeau J, Showers WJ (1997) Biostratigraphy and sedimentation rates of the Amazon Fan. Proc Ocean Drill Prog, Sci Res doi:10.2973/odp.proc.sr.155.248.1997
Piper DJW, Pirmez PL, Manley PL, Long D, Flood RD, Normark WR, Showers W (1997) Mass-transport deposits of the Amazon Fan. Proc Ocean Drill Prog, Sci Res 155. doi:10.2973/odp. proc.sr. 155.212.1997
Pirmez C, Imran J (2003) Reconstruction of turbidity currents in Amazon Channel. Mar Pet Geol 20: 823–849
Silva SRP, Maciel RR, Severino MCG (1999) Cenozoic Tectonics of Amazon Mouth Basin. Geo-Mar Lett 18: 256–262
Smith WHF, Sandwell DT (1997) Seafloor topography from satellite altimetry and ship soundings. Science 10: 1957–1962
Acknowledgments
The authors greatly acknowledge financial support and scholarship from CNPq/CTPETRO, CAPES, COFECUB and the Brazilian Petroleum Agency, ANP. We also thank GAIA and FUGRO for the availability of additional seismic data and SMT Kingdom for the use of educational licenses of the software Kingdom Suite. We acknowledge the reviewers Adolfo Maestro and Lorena Moscardelli for their valuable comments.
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Silva, C.G. et al. (2010). Megaslides in the Foz do Amazonas Basin, Brazilian Equatorial Margin. In: Mosher, D.C., et al. Submarine Mass Movements and Their Consequences. Advances in Natural and Technological Hazards Research, vol 28. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-3071-9_47
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DOI: https://doi.org/10.1007/978-90-481-3071-9_47
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