Fluvial dynamics and sedimentary deposits in the Amazon channel: providing tools to decipher the paleogeographical evolution of Amazonia and deposits of large anabranching rivers in the rock record

• Grant number: 17/06874-3
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: October 01, 2017
• End date: December 31, 2020
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Renato Paes de Almeida
• Grantee: Cristiano Padalino Galeazzi
• Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

Development of large river facies models is hampered by the lack of observations from active large river systems, especially considering bedforms that never emerge throughout the year, which account for the majority of the channel. That is particularly true for deep-channel environments, where water flows at depths of tens of meters, where conditions are extremely different from what is found in smaller systems, from which current facies models were derived. In the Amazon Basin, large-scale fluvial channels function as biogeographical barriers whose evolution through the Neogene is fundamental to understand present biodiversity. Available models for active anabranching rivers in the Amazon are based only on plan-view morphology of fluvial elements and bedforms observed in satellite imagery, integrated to observations and interpretations of related deposits exposed during low stages. Submerged bedforms are a key-element to develop large river bedforms and the present proposal intends mainly to survey with Multibeam Echo Sounder (MBES) the deep channel of selected reaches of the Amazon, in order to observe their morphology and distribution, relating them to water depth. The purpose is to integrate this data with complementary sedimentological and Ground Penetrating Radar (GPR) data from the shallow channel, which is exposed in the dry season, to compose and improve facies models of anabranching rivers. This contribution will provide tools to interpret Neogene sedimentary deposits in Amazonia, necessary to understand its paleogeographical evolution, and large anabranching rivers in the rock record. (AU)

Scientific publications

(12)

(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)

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, APR 2021. (17/06874-3, 14/00519-9, 16/03091-5, 16/19736-5)

JANIKIAN, LILIANE; DE ALMEIDA, RENATO PAES; GALEAZZI, CRISTIANO PADALINO; TAMURA, LARISSA NATSUMI; ARDITO, JULIO CESAR; CARRARI CHAMANI, MARLEY ANTONIO. Variability of fluvial architecture in a poorly vegetated Earth: Silurian sheet-braided and meandering ancestor river deposits recorded in northeastern Brazil. TERRA NOVA, v. 32, n. 3, DEC 2019. (17/06874-3, 16/03091-5)

GALEAZZI, C. P.; ALMEIDA, R. P.; DO PRADO, A. H.. Linking rivers to the rock record: Channel patterns and paleocurrent circular variance. GEOLOGY, v. 49, n. 11, p. 1402-1407, NOV 1 2021. (18/23899-2, 16/03091-5, 18/02197-0, 17/06874-3)

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, OCT 2021. (16/03091-5, 14/00519-9, 16/19736-5, 17/06874-3)

DO PRADO, ARIEL HENRIQUE; DE ALMEIDA, RENATO PAES; GALEAZZI, CRISTIANO PADALINO; SACEK, VICTOR; SCHLUNEGGER, FRITZ. Climate changes and the formation of fluvial terraces in central Amazonia inferred from landscape evolution modeling. EARTH SURFACE DYNAMICS, v. 10, n. 3, p. 15-pg., 2022-06-02. (18/02197-0, 18/23899-2, 17/06874-3, 16/03091-5)

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, DEC 2018. (17/06874-3, 14/16739-8, 16/19736-5, 12/50260-6)

VOLTANI, CIBELE GASPARELO; MENEGAZZO, MIRIAN COSTA; GALEAZZI, CRISTIANO PADALINO; MONTEFELTRO, FELIPE CHINAGLIA; DE ALMEIDA, RENATO PAES; ANELLI, LUIZ EDUARDO. Fish biostratinomy applied to lacustrine paleoenvironmental reconstructions: Oligocene deposits of Taubat'e Basin, Brazil. Journal of South American Earth Sciences, v. 129, p. 11-pg., 2023-09-01. (17/06874-3)

CISNEROS, JULIA; BEST, JIM; VAN DIJK, THAIENNE; DE ALMEIDA, RENATO PAES; AMSLER, MARIO; BOLDT, JUSTIN; FREITAS, BERNARDO; GALEAZZI, CRISTIANO; HUIZINGA, RICHARD; IANNIRUBERTO, MARCO; et al. Dunes in the world's big rivers are characterized by low-angle lee-side slopes and a complex shape. NATURE GEOSCIENCE, v. 13, n. 2, p. 156+, FEB 2020. (17/06874-3, 14/16739-8)

CISNEROS, JULIA; BEST, JIM; VAN DIJK, THAIENNE; DE ALMEIDA, RENATO PAES; AMSLER, MARIO; BOLDT, JUSTIN; FREITAS, BERNARDO; GALEAZZI, CRISTIANO; HUIZINGA, RICHARD; IANNIRUBERTO, MARCO; et al. Dunes in the world's big rivers are characterized by low-angle lee-side slopes and a complex shape. NATURE GEOSCIENCE, JAN 2020. (17/06874-3, 14/16739-8)

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. (16/19736-5, 14/16739-8, 18/02197-0, 17/06874-3, 16/03091-5, 12/50260-6)

KERN, ANDREA K.; GROSS, MARTIN; GALEAZZI, CRISTIANO P.; PUPIM, FABIANO N.; SAWAKUCHI, ANDRE O.; ALMEIDA, RENATO P.; PILLER, WERNER E.; KUHLMANN, GABRIEL G.; BASEI, MIGUEL A. S.. Re-investigating Miocene age control and paleoenvironmental reconstructions in western Amazonia (northwestern Solimoes Basin, Brazil). PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, v. 545, MAY 1 2020. (17/06874-3, 14/23334-4, 14/05582-0, 12/50260-6)

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. (17/06874-3, 14/16739-8, 16/03091-5, 18/02197-0, 12/50260-6)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

GALEAZZI, Cristiano Padalino. From large rivers to the rock record: channel patterns, bedforms and a facies model for the Amazon River. 2020. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Geociências (IG/BT) São Paulo.