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This video explores the vast Amazonian Craton and its Archean secrets, specifically focusing on the immense Brazilian mineral potential within the Carajás Mineral Province and the Amazon rainforest. We delve into the tectonic evolution of world-class IOCG deposits and high-grade iron ore systems that define the South American Platform, providing a deep dive for structural geologists and ore prospectors interested in the geochemistry and geophysical foundations of the region. The Amazonian Craton, subdivided into the Guyana Shield and the Central Brazil Shield, represents a premier global laboratory for studying crustal growth and continental accretion (Medeiros et al., 2026; Porto et al., 2025). The Carajás Mineral Province serves as the heart of this wealth, hosting approximately 18 billion tons of iron ore with 66% Fe content, representing the largest deposit of its kind in Brazil (Rosière & Chemale Jr., 2000; Motta et al., 2019). Furthermore, the Amazon holds the world’s largest speculated niobium resource at the Seis Lagos carbonatite complex, which may contain up to 3.8 billion tons of ore (Porto et al., 2025). For the modern geological community, understanding the Archean rifting of the cratonic keel and the subsequent hydrothermal events at 2.72 Ga and 2.55 Ga is essential for locating critical and strategic minerals hidden beneath the dense regolith of the Amazon (Juliani et al., 2021; Reis et al., 2021). By integrating airborne geophysical data with modern geochemical models, geologists can better characterize these polyphasic systems and unlock the remaining secrets of Brazil’s interior (Motta et al., 2019; Reis et al., 2021).
The bridge between Academy and Industry!
P. Geo. Ricardo A Valls, M. Sc. and Geo Gadfly
Valls Geoconsultant
ORCID ID- https://orcid.org/0000-0002-5421-0914
Scopus Author ID: 7003369619/35335510700
ResearcherID: S-6604-2018
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Some references
Almeida, F. F. M., Hasui, Y., de Brito Neves, B. B., & Fuck, R. A. (1981). Brazilian structural provinces: An introduction. Earth-Science Reviews, 17(1-2), 1-29
Biondi, J. C. (1999). Time distribution of the main Brazilian mineral deposits. 2: Metallogenic epochs. Revista Brasileira de Geociências, 29(4), 517-526,
Juliani, C., Rodrigues de Assis, R., Monteiro, L. V. S., Fernandes, C. M. D., Martins, J. E. Z. S., & Costa, J. R. C. (2021). Gold in Paleoproterozoic (2.1 to 1.77 Ga) continental magmatic arcs at the Tapajós and Juruena mineral provinces (Amazonian Craton, Brazil): A new frontier for the exploration of epithermal–porphyry and related deposits. Minerals, 11(7), 714,
Marini, O. J. (2016, October 18). Brazilian mineral potential: An overview [Conference session]. 24th World Mining Congress, Rio de Janeiro, Brazil.
Reis, N. J., Teixeira, W., D'Agrella-Filho, M. S., Bettencourt, J. S., Ernst, R. E., & Goulart, L. E. (2021). Large Igneous Provinces of the Amazonian Craton and their metallogenic potential in Proterozoic times. Geological Society, London, Special Publications, 518,,
Rosière, C. A., & Chemale Jr., F. (2000). Brazilian iron formations and their geological setting. Revista Brasileira de Geociências, 30, 274-278
Travassos da Rosa-Costa, L., et al. (2023). Overview of the geological mapping in Brazil: Historical analysis until 2022. Journal of the Geological Survey of Brazil, 6(1), 91-105
Valls Geoconsultant. (n.d.). Valls Geoconsultant YouTube Channel [Video channel]. YouTube. https://www.youtube.com/@valls_geoconsultant/videos [User Context].
Wikipedia. (n.d.). Mining in Brazil. https://en.wikipedia.org/wiki/Mining_in_Brazil.
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