Developing facies models for large river systems: processes and products in active bars in the Brazilian Amazon and implications for the paleogeographic reconstructions of the Neogene Amazon and the Mesozoic of Gondwana in NE-Brazil and E-Australia

• Grant number: 14/16739-8
• Support type: Regular Research Grants
• Duration: February 01, 2015 - January 31, 2017
• Field of knowledge: Physical Sciences and Mathematics - Geosciences
• Principal Investigator: Renato Paes de Almeida
• Grantee: Renato Paes de Almeida
• Home Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Assoc. researchers: André Marconato ; Bernardo Tavares Freitas ; Liliane Janikian Paes de Almeida ; Luiz Eduardo Anelli ; Marco Ianniruberto ; Mario Luis Assine ; Vinícius Tieppo Meira

Abstract

The depositonal architecture and the sedimentary processes and products in big rivers are one of the main unsolved aspects of clastic sedimentology, with implications for hydrocarbon reservoir geology and the interpretation of paleogeography, past climate and tectonic evolution in a number of sedimentary basins worldwide. Recent international effort has been directed towards the improvement of the still insuficient database on the dynamics and morphology of sedimentary architectural elements in big rivers, aiming at more elaborate facies models considering the particularities of these systems. The present proposal focuses on one key aspect of the sedimentology of large rivers, namely the dynamics of bars and channel bedforms, aiming to directly contribute to the advance of our knowledge of the architecture of large rivers through the integration of varied sources of information from active fluvial systems and the rock record. In this way, the improvement of facies models will be based on shallow seismic, GPR and OSL data from active and stabilized bars in the largest rivers in the Amazon, integrated to outcrop studies in recent and Neogene successions in the same region. The characterization of the bar-scale architecture of the active rivers will be used as a key to the interpretation of the evolution of the basin through the Neogene, focusing on the distribution and evolution of large channels and their roles as biogeographical barriers. The advances in the characterization of bar-scale architecture will also be applied to the interpretation of the Mesozoic rock record of Gondwana, with the detailed study of two well exposed examples of large river deposits (Cretaceous of Northeastern Brazil and Triassic of Eastern Australia), aiming at the evolution of the implications of the models for the interpretation of hydrocarbon reservoir analogues. The proposal is integrated to the Biota Amazonia project (FAPESP 2011/10400-0). (AU)

Scientific publications

(8)

(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, JUN 1 2019. Web of Science Citations: 0.

DO PRADO, ARIEL HENRIQUE; DE ALMEIDA, RENATO PAES; TAMURA, LARISSA NATSUMI; GALEAZZI, CRISTIANO PADALINO; IANNIRUBERTO, MARCO. Interpretation software applied to the evaluation of shallow seismic data processing routines in fluvial deposits. BRAZILIAN JOURNAL OF GEOLOGY, v. 49, n. 2 2019. Web of Science Citations: 0.

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, DEC 2018. Web of Science Citations: 4.

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, DEC 2017. Web of Science Citations: 3.

VAREJAO, FILIPE GIOVANINI; WARREN, LUCAS VERISSIMO; DE JESUS PERINOTTO, JOSE ALEXANDRE; NEUMANN, VIRGINIO HENRIQUE; FREITAS, BERNARDO TAVARES; DE ALMEIDA, RENATO PAES; ASSINE, MARIO LUIS. Upper Aptian mixed carbonate-siliciclastic sequences from Tucano Basin, Northeastern Brazil: Implications for paleogeographic reconstructions following Gondwana break-up. CRETACEOUS RESEARCH, v. 67, p. 44-58, DEC 1 2016. Web of Science Citations: 5.

DE ALMEIDA, RENATO PAES; GALEAZZI, CRISTIANO PADALINO; FREITAS, BERNARDO TAVARES; JANIKIAN, LILIANE; LANNIRUBERTO, MARCO; MARCONATO, ANDRE. Large barchanoid dunes in the Amazon River and the rock record: Implications for interpreting large river systems. Earth and Planetary Science Letters, v. 454, p. 92-102, NOV 15 2016. Web of Science Citations: 9.

ALMEIDA, RENATO P.; FREITAS, BERNARDO T.; TURRA, BRUNO B.; FIGUEIREDO, FELIPE T.; MARCONATO, ANDRE; JANIKIAN, LILIANE. Reconstructing fluvial bar surfaces from compound cross-strata and the interpretation of bar accretion direction in large river deposits. SEDIMENTOLOGY, v. 63, n. 3, p. 609-628, APR 2016. Web of Science Citations: 8.

TAMURA, LARISSA NATSUMI; DE ALMEIDA, RENATO PAES; TAIOLI, FABIO; MARCONATO, ANDRE; JANIKIAN, LILIANE. Ground Penetrating Radar investigation of depositional architecture: the Sao Sebastiao and Marizal formations in the Cretaceous Tucano Basin (Northeastern Brazil). BRAZILIAN JOURNAL OF GEOLOGY, v. 46, n. 1, p. 15-27, MAR 2016. Web of Science Citations: 3.