Results 51 to 60 of about 848 (205)

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

Unwrapping reworked crust at the Columbia supercontinent margin within Amazonian Craton using satellite potential field data synergy

, 2020
This file contains the geochronology data inventory (Supplementary Material Table 1) as a MS Excel (*.xls) table used for interpretation in the the original publication of 'Unwrapping reworked crust at the Columbia supercontinent margin within Amazonian
João G. Motta, Peter G. Betts, Vinícius T. Meira, Carlos R. de Souza Filho, Verônica G. Trevisan   +4 more
core   +1 more source

Recycling process and proto-kimberlite melt metasomatism in the lithosphere-asthenosphere boundary beneath the Amazonian Craton recorded by garnet xenocrysts and mantle xenoliths from the Carolina kimberlite [PDF]

, 2022
Here we present new data on the major and trace element compositions of silicate and oxide minerals from mantle xenoliths brought to the surface by the Carolina kimberlite, Pimenta Bueno Kimberlitic Field, which is located on the southwestern border of
Jasper Berndt, Valmir da Silva Souza, Jalowitzki, Tiago Luís Reis, Yannick Bussweiler, Rocha, Marcelo Peres, Rodrigues, Rodrigo Antônio de Freitas, Weska, Ricardo Kalikowski, Elton Luiz Dantas, Elisa Soares Rocha Barbosa, Stephan Klemme, Rodrigues, Eduardo Novais, Gervasoni, Fernanda   +11 more
core   +1 more source

Lithospheric origin of a diamond from the Rio Sorriso area, Mato Grosso State, Brazil

Frontiers in Geochemistry
Diamonds are unique samples that enlarge our vision of the physical and chemical reactions occurring in Earth’s deep, inaccessible mantle. By investigating the minerals and fluids trapped within them, it is possible to ascertain the key conditions ...
A. Angellotti, G. Marras, M. Morana, S. Chariton, V. Stopponi, L. Medeghini, C. Romano, A. Correale, L. Bindi, F. V. Kaminsky, V. Stagno, V. Stagno   +11 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

Rhyacian evolution of the eastern São Luís Craton: petrography, geochemistry and geochronology of the Rosário Suite

Brazilian Journal of Geology
: The São Luís Cráton comprises an area between northeast Pará state and northwest Maranhão that exposes Paleoproterozoic granitic suites and meta-volcanosedimentary sequences. In the east of this geotectonic unit, about 70 km south of São Luís, there is
Bruna Karine Correa Nogueira, Paulo Sergio de Sousa Gorayeb, Elton Luiz Dantas, Rafael Estumano Leal, Marco Antonio Galarza   +4 more
doaj   +1 more source

Near‐Synchronous Cambrian Evolution of the Transbrasiliano‐Kandi‐4°50′ Shear Zone in South America and Africa

Terra Nova, Volume 38, Issue 2, Page 97-105, April 2026.
ABSTRACT The Transbrasiliano‐Kandi‐4°50′ (TK4) shear zone in western Gondwana crosscuts South America and NW Africa for at least 6000 km. Despite its impressive size, the timing of the main episode of dextral ductile shearing is uncertain. We present detailed in situ multi‐mineral geochronology of mylonites from both Brazil and Algeria supporting that ...
F. A. Caxito, B. V. Ribeiro, F. Alkmim, A. Deramchi, C. L. Kirkland   +4 more
wiley   +1 more source

Paleomagnetic Study of Paleoproterozoic Units from Amazonian Craton

, 2012
Na América do Sul, o Cráton Amazônico representa um componente essencial nas reconstruções de supercontinentes, entretanto, há uma grande escassez de dados paleomagnéticos de qualidade para esta unidade geotectônica, principalmente, para o Proterozóico ...
Santos, Franklin Bispo dos, Franklin Bispo dos Santos   +1 more
core   +1 more source

Petrology, geochemistry and U -Pb zircon and baddeleyite ages of the alkaline rocks from the central- southern Guyana Shield, northern Amazonian Craton [PDF]

, 2021
CAPES - COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIORThe Apiau Alkaline Complex (AAC) represents a rift-related intracontinental magmatism and occurs as intrusions within the Precambrian basement of the central-southern portion of the ...
Santos, Ticiano José Saraiva dos, Tonetto, Erica Martini, de Figueiredo, Raisa Fagundes   +2 more
core   +1 more source

Datações U-Pb Convencional Versus SHRIMP do Maciço Estanífero Santa Bárbara, Suíte Granitos Últimos de Rondônia, Brasil [PDF]

Geologia USP. Série Científica, 2002
O Maciço Granítico Santa Bárbara é parte da Suíte Granitos Últimos de Rondônia (998 - 974 Ma), e integra a ProvínciaEstanífera de Rondônia (SW do Cráton Amazônico). Compreende três unidades de granitos altamente fracionados,metaluminosos a peraluminosos,
Irena Sparrenberger, Jorge Silva Bettencourt, Richard M. Tosdal, Joseph L. Wooden   +3 more
doaj