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dc.creatorFontoura, Bruno Silva da
dc.creatorStrieder, Adelir José
dc.creatorCorrêa, Iran Carlos Stalliviere
dc.creatorMendes, Paulo Rogério
dc.date.accessioned2025-09-24T10:51:53Z
dc.date.available2025-09-24T10:51:53Z
dc.date.issued2024
dc.identifier.citationFONTOURA, Bruno Silva da et al. Gravity-Driven Listric Growth Fault and Sedimentation in the Lagoa do Peixe, Rio Grande do Sul Coastal Plain, Brazil. OPEN JOURNAL OF GEOLOGY, v. 14, p. 594-616, 2024. Disponível em: https://www.scirp.org/journal/paperinformation?paperid=132733. Acesso em: 21 set. 2025.pt_BR
dc.identifier.urihttp://guaiaca.ufpel.edu.br/xmlui/handle/prefix/17593
dc.description.abstractHigh frequency, high resolution GPR surveys are successfully applied to investigate near-surface stratification architecture of sedimentary units in coastal plains and to define their depositional conditions. However, low frequency GPR surveys to investigate fault-related depositional systems at greater depths are scarce. This survey was designed investigate a > 100 km long linear escarpment that controls the northwest margin of the Lagoa do Peixe, an important lagoon in Rio Grande do Sul Coastal Plain (RGSCP, Brazil). The traditional approach points that RGSCP was developed by juxtaposition of four lagoons/barrier systems as consequence of sea level changes; no deformational structure is admitted to exist before. The low frequency GPR (50 MHz, RTA antenna) and geological surveys carried out in the RGSCP showed the existence of a large, gravity-driven listric growth fault controlling the Lagoa do Peixe escarpment and hangingwall sedimentation. The radargrams in four subareas along the Lagoa do Peixe Growth Fault could be interpreted following the seismic expression of rift-related depositional systems. The radargrams enabled to distinguish three main lagoonal deposition radarfacies. The lower lagoonal radarfacies is a convex upward unit, thicker close to growth fault; the radarfacies geometry indicates that fault displacement rate surpasses the sedimentation rate, and its upper stratum is aged ~3500 l4C years BP. The second lagoonal radarfacies is a triangular wedge restricted to the lagoon depocenter, whose geometry indicates that fault displacement and the sedimentation rates kept pace. The upper lagoonal radarfacies is being deposited since 1060 ± 70 l4C years BP, under sedimentation rate higher than fault displacement rate. The results indicate that low frequency GPR surveys can help in investigating fault-related depositional systems in coastal zones. They also point to a new approach in dealing with RGSCP stratigraphy.pt_BR
dc.languageengpt_BR
dc.publisherSciELOpt_BR
dc.rightsOpenAccesspt_BR
dc.subjectGPR (Ground-Penetrating Radar)pt_BR
dc.subjectGrowth faultpt_BR
dc.subjectSedimentationpt_BR
dc.subjectRadarfaciespt_BR
dc.subjectCoastal plainpt_BR
dc.titleGravity-Driven Listric Growth Fault and Sedimentation in the Lagoa do Peixe, Rio Grande do Sul Coastal Plain, Brazilpt_BR
dc.typearticlept_BR
dc.identifier.doihttps://doi.org/10.4236/ojg.2024.144025
dc.rights.licenseCC BY-NC-SApt_BR


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