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Evolution of the Amazon drainage basin: Andean uplift, climate and other geodynamic processes

Grant number: 17/24870-5
Support Opportunities:Regular Research Grants
Duration: March 01, 2018 - July 31, 2020
Field of knowledge:Physical Sciences and Mathematics - Geosciences - Geophysics
Principal Investigator:Victor Sacek
Grantee:Victor Sacek
Host Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated researchers:Renato Paes de Almeida


The Andean orogeny had a profound impact on the evolution of the Amazon drainage system, modifying the climate in South America and the influx of sediments to the interior and marginal sedimentary basins. Additionally, the dynamic of the surface processes of erosion and deposition continually sculpted the landscape and guided the drainage pattern on the continents. Therefore, the correct interpretation of the geological evolution of the northern South America during the Cenozoic depends not only on the interior dynamics of the planet but also on the coupling of the Earth's geodynamics with the erosion of the continents, deposition in the sedimentary basins and the interaction with the evolving climate. Due to the great complexity of the different processes involved in the geological evolution of Amazonia, the use of numerical models is a natural way to treat this problem. The aim of this project is to study the formation and evolution of the Amazon drainage system based on numerical scenarios, taking into account surface processes along with geodynamic processes such as Andean uplift, flexure of the lithosphere, and mantle convection. With this coupled numerical model we intend to test different mechanisms proposed in the last decades to explain the formation of the present Amazon drainage system as well as the timing for the main event(s) of drainage reorganization. This project intends to contribute to the discussion about stratigraphic evolution, paleoclimate conditions, and biodiversity impacts in Amazonia. (AU)

Articles published in Pesquisa FAPESP Magazine about the research grant:
Simulaciones por computadora apuntan a explicar el origen de las formaciones montañosas de Serra do Mar y de Serra da Mantiqueira en Brasil 
Computer simulations attempt to explain the origin of the Serra do Mar and Mantiqueira mountain ranges 
Articles published in Agência FAPESP Newsletter about the research grant:
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Scientific publications (4)
(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)
BICUDO, TACIO CORDEIRO; SACEK, VICTOR; DE ALMEIDA, RENATO PAES. Reappraisal of the relative importance of dynamic topography and Andean orogeny on Amazon landscape evolution. Earth and Planetary Science Letters, v. 546, . (17/24870-5, 17/00461-9)
SALAZAR-MORA, CLAUDIO ALEJANDRO; SACEK, VICTOR. Lateral flow of thick continental lithospheric mantle during tectonic quiescence. JOURNAL OF GEODYNAMICS, v. 145, . (17/10467-4, 17/00461-9, 17/24870-5)
SACEK, VICTOR; DE MORAIS NETO, JOAO MARINHO; VASCONCELOS, PAULO MARCOS; CARMO, ISABELA DE OLIVEIRA. Numerical Modeling of Weathering, Erosion, Sedimentation, and Uplift in a Triple Junction Divergent Margin. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, v. 20, n. 5, p. 2334-2354, . (17/24870-5)
BICUDO, TACIO CORDEIRO; SACEK, VICTOR; DE ALMEIDA, RENATO PAES; BATES, JOHN M.; RIBAS, CAMILA CHEREM. Andean Tectonics and Mantle Dynamics as a Pervasive Influence on Amazonian Ecosystem. SCIENTIFIC REPORTS, v. 9, . (17/24870-5, 17/00461-9)

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