Results 11 to 20 of about 848 (205)

Paleomagnetism of the Amazonian Craton and its role in paleocontinents [PDF]

Brazilian Journal of Geology, 2016
: In the last decade, the participation of the Amazonian Craton on Precambrian supercontinents has been clarified thanks to a wealth of new paleomagnetic data.
Manoel Souza D'Agrella-Filho, Franklin Bispo-Santos, Ricardo Ivan Ferreira Trindade, Paul Yves Jean Antonio   +3 more
doaj   +4 more sources

The Novo Progresso Formation, Tapajós Gold Province, Amazonian Craton: zircon U-Pb and Lu-Hf constraints on the maximum depositional age, reconnaissance provenance study, and tectonic implications [PDF]

Journal of the Geological Survey of Brazil, 2018
The Novo Progresso Formation, located in southeastern Tapajós Gold Province, at its boundary with the Iriri-Xingu Domain, south of the Amazonian Craton, is composed of quartz- and lithic-arenites and siltstones with volcanic/volcanoclastic contributions,
Evandro Klein, Stella Bijos Guimarães, Joseneusa Brilhante Rodrigues, Cesar Lisboa Chaves, Sulsiene Machado Souza-Gaia, Elem Cristina dos Santos Lopes, João Marcelo Rodrigues Castro   +6 more
doaj   +7 more sources

Extensional exhumation of cratons: insights from the Early Cretaceous Rio Negro–Juruena belt (Amazonian Craton, Colombia) [PDF]

Solid Earth, 2023
This study presents results from apatite fission track (AFT) thermochronology to investigate the thermal history and exhumation dynamics of the Rio Negro–Juruena basement, situated within the western Guiana Shield of the Amazonian Craton.
A. Fonseca, S. Nachtergaele, A. Bonilla, S. Dewaele, J. De Grave   +4 more
doaj   +6 more sources

Archean crust and metallogenic zones in the Amazonian Craton sensed by satellite gravity data. [PDF]

Sci Rep, 2019
The formation of ore deposits has been extensively studied from a shallow crust perspective. In contrast, the association of mineral systems with deep crustal structure of their host terranes remains relatively undisclosed, and there is evidence that ...
Motta JG, Souza Filho CR, Carranza EJM, Braitenberg C.   +3 more
europepmc   +6 more sources

U-Pb SHRIMP dating of basement rocks of the Iriri-Xingu domain, Central Amazonian province, Amazonian craton, Brazil

Brazilian Journal of Geology, 2019
The Iriri-Xingu domain, located in the central part of the Amazonian craton, consists of extensive occurrences of Paleoproterozoic volcanic rocks and granites with published ages of ca.
Marcelo Lacerda Vasquez, Umberto Giuseppe Cordani, Kei Sato, Jaime dos Passos de Oliveira Barbosa, Maria Telma Lins Faraco, Victor Câmara Maurer   +5 more
doaj   +2 more sources

Large igneous provinces of the Amazonian Craton and their metallogenic potential in Proterozoic times

Geological Society, London, Special Publications, 2022
This paper overviews the Proterozoic large igneous provinces (LIPs) of the Amazonian Craton, characterized by large volumes of extrusive and intrusive magmatic rocks.
Bettencourt, J. S., D'Agrella-Filho, M. S., Goulart, L. E. A., Ernst, Richard E., Reis, Nelson Joaquim, Teixeira, Wilson   +5 more
core   +2 more sources

Intense weathering attending the emergence of the southeast Amazonian Craton during the Neoarchean

Journal of the Geological Society
Sedimentological evidence and detrital zircon provenance analysis show that the Amazonian Craton, Brazil, was subjected to large-scale subaerial erosion by c. 2.7 Ga.
Philippot, Pascal, Rossignol, Camille, Thomazo, Christophe, Siciliano Rego, Eric, Pellerin, Alice, Tribovillard, Nicolas   +5 more
core   +4 more sources

Organic Matter In The Neoproterozoic Cap Carbonate From The Amazonian Craton, Brazil

Journal of South American Earth Sciences, 2017
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Bitumen found in Neoproterozoic carbonates from the southern Amazonian Craton, Brazil, represents a great challenge ...
Afonso C. R.; Santos Neto, Candido A. V.; Araujo, Sousa Junior, Eugenio V.; Moura, Gustavo R.; Nogueira, Bruno Q.; Reis, Francisco de A. M.   +6 more
core   +3 more sources

The 1590-1520 Ma Cachoeirinha magmatic arc and its tectonic implications for the Mesoproterozoic SW Amazonian craton crustal evolution

Anais da Academia Brasileira de Ciências, 2004
Isotopic and chemical data of rocks from the Cachoeirinha suite provide new insights on the Proterozoic evolution of the Rio Negro/Juruena Province in SW Amazonian craton.
Ruiz Amarildo S., Geraldes Mauro C., Matos João B., Teixeira Wilson, Van Schumus William R., Schmitt Renata S.   +5 more
doaj   +1 more source

Stratigraphy and geochronological constraints of the Serra Sul Formation (Carajás Basin, Amazonian Craton, Brazil)

Precambrian Research, 2020
The Carajás Basin, Amazonian Craton, hosts extensive Neoarchean to Paleoproterozoic sedimentary archives, which are still poorly constrained regarding their depositional settings, ages, and type of basin in which they have been deposited. In this study,
Silva M. A. L., Rossignol C., Teixeira L., Lana C., Philippot P., Siciliano Rego E., Narduzzi F., Avila J. N.   +7 more
core   +8 more sources