Results 21 to 30 of about 848 (205)

The Amazonian Craton and its influence on past fluvial systems (Mesozoic-Cenozoic, Amazonia)

, 2010
The Amazonian Craton is an old geological feature of Archaean/Proterozoic age that has determined the character of fluvial systems in Amazonia throughout most of its past.
Hoorn, C., Roddaz, M., Carina Hoorn, Russell Mapes, Ochoa-Lozano, D., Wesselingh, F.P., Hoorn, C.; id_orcid, Uba, C., Rodolfo Dino, Soares, E., Emilio Soares, Martin Roddaz, Dino, R., Mapes, R., Diana Ochoa-Lozano, Cornelius Uba   +15 more
core   +4 more sources

Geology and geochemistry of deformed granites from the Querari Complex, Rio Negro Province, NW-Amazonian Craton, Brazil

Journal of the Geological Survey of Brazil, 2021
The Querari Complex corresponds to the basement rocks from Uaupés Domain and represents one of the least studied units in the northwest of the Rio Negro Province, Amazonian Craton.
Paulo Jerry Bentes Gomes, Rielva Solimairy Campelo do Nascimento, Renata da Silva Veras, Marcelo Esteves Almeida, Marcia Caroline Rodrigues Carneiro   +4 more
doaj   +1 more source

Thermobarometry of diamond inclusions: Mantle structure and evolution beneath Archean cratons and mobile belts worldwide

Geosystems and Geoenvironment, 2023
Thermobarometric calculations for mineral inclusions in diamonds provide a systematic comparison of P-T-fO2 conditions for different cratons and mobile belts worldwide, using a database of 4440 mineral EPMA analyses.
Igor Ashchepkov, Alla Logvinova, Zdislav Spetsius, Hilary Downes   +3 more
doaj   +1 more source

Crustal growth in the northeast portion of the Rhyacian Bacajá domain, SE Amazonian craton, based on U-Pb, Lu-Hf, and Sm-Nd data [PDF]

Brazilian Journal of Geology, 2023
The Bacajá domain, southeastern Amazonian craton, comprises Mesoarchaean and Siderian terrains reworked during the Transamazonian cycle. Combined analyses of zircon LA-ICP-MS U-Pb and Lu-Hf with whole-rock Sm-Nd from the northeast portion of this domain ...
Lucas Baía Magalhães, Moacir José Buenano Macambira, Edesio Maria Buenano Macambira, Paulo dos Santos Freire Ricci   +3 more
doaj   +1 more source

San José de Guaviare Syenite, Colombia: Repeated Ediacaran intrusions in the northwestern Amazonian Craton

Boletín Geológico, 2021
The Neoproterozoic igneous rocks found in the municipality of San José del Guaviare include several isolated plutonic bodies that protrude from the Phanerozoic sedimentary cover in belts aligned NW-SE.
Carolina Amaya López, Marion Weber Scharff, Mauricio Ibáñez Mejía, Federico Alberto Cuadros Jiménez, Jorge Julián Restrepo Álvarez, Nilson Francisquini Botelho, Mario Maya Sánchez, Orlando Manuel Pérez Parra, Carlos Ramírez Cárdenas   +8 more
doaj   +1 more source

The NW Amazonian Craton in Guainia and Vaupes departments, Colombia : transition between orogenic to anorogenic environments during the Paleo-Mesoproterozoic

, 2021
In order to improve our understanding of the NW-Amazonian Craton evolution, we present new petrographic, geochemical and geochronological analyses of 27 samples from the geotectonic Rio Negro-Juruena Province in eastern Colombia (Guainia and Vaupes ...
Alessio, Brandon, Kroonenberg, Salomon, Cramer, Thomas, Glorie, Stijn, De Grave, Johan, Bonilla, Amed, De Grave, JohanWE138010013111730000-0003-0425-625XF59A4EAA-F0ED-11E1-A9DE-61C894A0A6B4   +6 more
core   +1 more source

From microanalysis to supercontinents: insights from the Rio Apa Terrane into the Mesoproterozoic SW Amazonian Craton evolution during Rodinia assembly [PDF]

, 2022
First published: 10 November 2021Deciphering the tectono-metamorphic evolution of Precambrian terranes can be difficult due to reworking by later superimposed events.
Melanie A. Finch, Simpson, Alexander, Glorie, S., Cawood, Peter A., Vitor R. Barrote, Glorie, Stijn, Cawood, P., Mahyra Tedeschi, Ribeiro, Bruno V., Tedeschi, Mahyra, Alexander Simpson, Stijn Glorie, Barrote, V., Tedeschi, M., Frederico M. Faleiros, Armit, R., Peter A. Cawood, Faleiros, Frederico M., Robin Armit, Murphy, T.D., Bruno V. Ribeiro, Timothy D. Murphy, Finch, M., Murphy, Timothy D., Meira Faleiros, F., Armit, Robin, Barrote, Vitor R., Ribeiro, B., Finch, Melanie A., Simpson, A.   +29 more
core   +1 more source

Geological knowledge advances on the Alto Rio Negro region, northwestern Amazonian Craton, Brazil: a review

Journal of the Geological Survey of Brazil, 2021
This paper presents a literature review of the geology of the Alto Rio Negro region, located in northwestern Brazil. Firstly, we summarize the Amazonian Craton tectonic models and how the study area fits in these different tectonic models.
Túlio Amós de Araújo Mendes, Rielva Solimairy Campelo do Nascimento, Renata da Silva Veras, Marcelo Esteves Almeida, Luiz Guilherme Knauer   +4 more
doaj  

Unraveling one billion years of geological evolution of the southeastern Amazonia Craton from detrital zircon analyses

, 2021
International audienceDespite representing one of the largest cratons on Earth, the early geological evolution of the Amazonia Craton remains poorly known due to relatively poor exposure and because younger metamorphic and tectonic events have obscured ...
Philippot, Pascal, Silva, MAL, Rossignol, Camille, de Souza, Romário Almeida, Ávila, JN, Antonio, PYJ, Lana, Cristiano, Ávila, Janaína, N, Narduzzi, Francesco, Rossignol, C, Silva, Marco, a L, Rego, ES, Siciliano Rego, Eric, Trindade, Ricardo, I F, Teixeira, Lívia, de Souza, RA, Narduzzi, F, Philippot, P, Yves Jean Antonio, Paul, Teixeira, L, Lana, C, Trindade, RIF   +21 more
core   +1 more source

Geology, petrology, and geochronology of 2.03 to 1.98 Ga arc magmatic granites from the Novo Mundo Complex: implications for the Amazonian Craton tectonic evolution [PDF]

Brazilian Journal of Geology
The Novo Mundo granitic Complex lies in the southernmost margin of the Amazonian Craton, Brazil. New petrological, geochemical, U–Pb and Sm–Nd isotopic data allow us to propose a new petrogenetic model for granite genesis in the southernmost portion of ...
Adriana Araujo Castro Lopes, Márcia Abrahão Moura, Anna Lorena Gomes da Costa Testa, Antônio João Paes de Barros   +3 more
doaj   +2 more sources