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Quantitative approaches for big river deposits: integrated field geology and 3D photogrammetric models


The process-product relationship in fluvial depositional systems is a fundamental issue on sedimentary geology, with implications for reservoir engineering, paleogeographical reconstructions and predictive models for mineral and hydrocarbon exploration. Nonetheless, the present day understanding of this relationship presents important limitations underpinned by the adequate description of active system and geological record components. Only recently, technological advances allowed the 3D investigation of sedimentary processes in the deepest parts of large-scale fluvial channels, as well as the survey of contemporaneous deposits and the description of large outcrops with reduced distortion imposed by scale. Thus, there is an urgent necessity to establish quantifiable descriptive parameters to compare the ancient fluvial Record and active fluvial systems, reconciling recent advances in sedimentology and rising demands from related sectors like reservoir engineering. In this way, the present proposal aims at the investigation of statistical distributions of sedimentological parameters in ancient fluvial successions ascribed to a large-scale fluvial system, allowing the comparison with statistical distributions of analogue parameters found in active fluvial systems through geophysical surveys. To accomplish this goal, an ancient large-scale river succession will be approached through integrated field geology and analysis of 3D outcrop photogrammetric models obtained with Unmanned Aerial Vehicles (UAVs). The expected results are methodological innovations on the description and interpretation of fluvial depositional systems, with potential implications for other areas within sedimentary geology. This research proposal is related to FAPESP research projects "Structure and evolution of the Amazonian biota and its environment: an integrative approach" (2012/50260-6) and "Characterization of heterogeneities and modeling of reservoir analogues in fluvial and eolian deposits" (2016/03091-5). (AU)

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Scientific publications (6)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
TAMURA, LARISSA N.; ALMEIDA, RENATO P.; GALEAZZI, CRISTIANO P.; FREITAS, BERNARDO T.; IANNIRUBERTO, MARCO; PRADO, ARIEL H.. Upper-bar deposits in large Amazon rivers: Occurrence, morphology and internal structure. SEDIMENTARY GEOLOGY, v. 387, p. 1-17, . (16/19736-5, 14/16739-8, 18/02197-0, 17/06874-3, 16/03091-5, 12/50260-6)
FREITAS, BERNARDO T.; SILVA, LEONARDO H. G.; ALMEIDA, RENATO P.; GALEAZZI, CRISTIANO P.; FIGUEIREDO, HEITOR G.; TAMURA, LARISSA N.; JANIKIAN, LILIANE; FIGUEIREDO, FELIPE T.; ASSINE, MARIO L.. Cross-strata palaeocurrent analysis using virtual outcrops. SEDIMENTOLOGY, v. 68, n. 6, p. 2397-2421, . (16/03091-5, 14/00519-9, 16/19736-5, 17/06874-3)
FREITAS, B. T.; RUDNITZKI, I. D.; MORAIS, L.; CAMPOS, M. D. R.; ALMEIDA, R. P.; WARREN, V, L.; BOGGIANI, P. C.; CAETANO-FILHO, S.; BEDOYA-RUEDA, C.; BABINSKI, M.; et al. Cryogenian glaciostatic and eustatic fluctuations and massive Marinoan-related deposition of Fe and Mn in the Urucum District, Brazil. GEOLOGY, v. 49, n. 12, p. 1478-1483, . (16/19736-5, 17/22099-0, 16/06114-6)
VAREJAO, FILIPE GIOVANINI; WARREN, LUCAS VERISSIMO; FREITAS, BERNARDO TAVARES; NEUMANN, VIRGINIO HENRIQUE; ASSINE, MARIO LUIS. Saline lake development in the Aptian post-rift phase of the Tucano Basin: Tectonic and paleogeographic implications. Journal of South American Earth Sciences, v. 92, p. 282-297, . (14/00519-9, 16/19736-5)
GALEAZZI, CRISTIANO P.; ALMEIDA, RENATO P.; MAZOCA, CARLOS E. M.; BEST, JIM L.; FREITAS, BERNARDO T.; IANNIRUBERTO, MARCO; CISNEROS, JULIA; TAMURA, LARISSA N.. The significance of superimposed dunes in the Amazon River: Implications for how large rivers are identified in the rock record. SEDIMENTOLOGY, v. 65, n. 7, p. 2388-2403, . (16/19736-5, 17/06874-3, 14/16739-8, 12/50260-6)
FREITAS, BERNARDO T.; ALMEIDA, RENATO P.; CARRERA, SIMONE C.; FIGUEIREDO, FELIPE T.; TURRA, BRUNO B.; VAREJAO, FILIPE G.; ASSINE, MARIO L.. Aptian sedimentation in the Reconcavo-Tucano-Jatoba Rift System and its tectonic and paleogeographic significance. Journal of South American Earth Sciences, v. 80, p. 460-481, . (16/03091-5, 13/01825-3, 16/19736-5, 14/16739-8, 14/00519-9)

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