Results 61 to 70 of about 4,148,897 (157)

The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)

Sedimentology, Volume 73, Issue 3, Page 802-837, April 2026.
ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti, Marta Barbarano, Mara Limonta, Guido Pastore, Pieter Vermeesch, Giovanni Vezzoli   +5 more
wiley   +1 more source

Petrology of Gameleira potassic lamprophyres, São Francisco Craton

Anais da Academia Brasileira de Ciências, 2012
Gameleira lamprophyres are dykes and mafic microgranular enclaves associated with the shoshonitic Gameleira monzonite. This association belongs to the Paleoproterozoic alkaline magmatism from Serrinha nucleus, northeast Brazil.
Jorge Plá Cid, Cristiani S. Campos, Lauro V.S. Nardi, Luana Florisbal   +3 more
doaj  

Geochemical baseline and multivariate analysis of potentially toxic elements in stream sediments of the Vazante zinc district, Minas Gerais, Brazil

Frontiers in Environmental Science
Intense land use, driven by mining and agriculture, promotes the dispersal of elements, including potentially toxic ones (PTEs). This dispersal significantly enhances element concentrations in soils, sediments, and water bodies, thereby altering the ...
Rafael Tarantino Amarante, Rafael Tarantino Amarante, Rafael Tarantino Amarante, Eduardo Duarte Marques, Eduardo Duarte Marques, Úrsula Azevedo Ruchkys, Emmanoel Vieira Silva-Filho, Gabriel Soares Almeida, Isadora Mello, Gabriel Negreiros Salomão   +9 more
doaj   +1 more source

Exploring the Gravimetric and Geochronological Links in Ancient Terranes of the São Francisco Craton and Borborema Province, NE‐Brazil

Terra Nova, Volume 38, Issue 2, Page 77-86, April 2026.
ABSTRACT Deep crustal fragments and structural lineaments identified through satellite gravity data provide evidence for the extension of the reworked ancient basement of the Central African Block into the northern São Francisco Craton and southern Borborema Province.
Douglas Teixeira Martins, Wagner da Silva Amaral, Felipe Holanda dos Santos, Evilarde Uchôa Filho   +3 more
wiley   +1 more source

O enxame de diques de anfibolito do Cráton São Francisco meridional

Brazilian Journal of Geology
Resumo: Em níveis crustais mesozonais do Cráton São Francisco meridional, diques máficos datados em 2,19 Ga se constituíram em resposta à contração para NW ocorrida durante a Orogenia Transamazônica. Neste evento, o magma toleítico se alojou, cristalizou
Alexandre de Oliveira Chaves
doaj   +1 more source

Stabilization of the southern portion of the São Francisco craton, SE Brazil, through a long-lived period of potassic magmatism

, 2016
Although the southern portion of the São Francisco craton in southeast Brazil encompasses one of the largest segments of Meso- to Neoarchaean crust in the South American plate, there is little understanding of the processes leading to cratonization of ...
Alkmim, Fernando F., Armstrong, Richard, Romano, Rafael, Stevens, Gary, Lana, Cristiano   +4 more
core   +1 more source

Petrogenesis of the Brauna Kimberlite Field, São Francisco craton [PDF]

, 2018
Orientador: Elson Paiva de OliveiraTese (doutorado) - Universidade Estadual de Campinas, Instituto de GeociênciasResumo: A presente tese concentrou-se na classificação do magmatismo kimberlítico do Campo Kimberlítico Brauna no nordeste do Craton do São ...
Donatti Filho, Jose Paulo, 1981-
core  

Reconstruction of Precambrian terranes of Northeastern Brazil along Cambrian strike-slip faults: a new model of geodynamic evolution and gold metallogeny in the State of Bahia

Brazilian Journal of Geology, 2019
The Precambrian basement of Northeastern Brazil is the product of Rhyacian block convergence. The main deformation and intrusion of crustal granitoids occurred between 2.15 and 1.8 Ga ago.
João Batista Guimarães Teixeira, Aroldo Misi, Maria da Glória da Silva, Reinaldo Santana Correia de Brito   +3 more
doaj   +1 more source

Mesozoic alkaline volcanism and mantle evolution of the southwestern São Francisco craton, Brazil [PDF]

, 2016
This thesis explores the nature of the subcontinental lithosphere underlying the southwestern margin of the São Francisco craton and the relation of variations in the petrochemistry of kimberlites and related alkali igneous rocks to variations in age ...
Bizzi, Luiz Augusto
core   +1 more source

As raízes granulíticas do cinturão Salvador-Esplanada-Boquim, Cráton do São Francisco, Bahia-Sergipe, Brasil

Geologia USP. Série Científica, 2018
O Cinturão Salvador-Esplanada-Boquim (CSEB) é provavelmente um ramo nordeste do Orógeno Itabuna-Salvador-Curaçá. Neste trabalho, inédito para a região, é apresentada a caracterização petrográfica, petroquímica e geocronológica preliminar das rochas ...
Johildo Salomão Figueirêdo Barbosa, Moacyr Moura Marinho, Angela Beatriz de Menezes Leal, Ernande Melo de Oliveira, Jailma Santos de Souza-Oliveira, Roberto Max de Argollo, Cristiano Lana, Rafael Gordilho Barbosa, Leila Tatiane Lopes Santos   +8 more
doaj   +1 more source