Results 51 to 60 of about 1,323 (166)

Interior Rifting Coupled With Peripheral Subduction in the Rodinia Supercontinent: New Insights From the Tarim Craton

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.
Abstract After assembly, supercontinents are shaped by internal rifting and peripheral subduction. However, the geodynamic relationship between these two processes and their respective contributions to supercontinent breakup remain poorly understood.
Shipeng Liu, Rongfeng Ge, Teng Zhou, Yang Si, Yue Wang   +4 more
wiley   +1 more source

Climax of Late Paleoproterozoic Rift‐Related Magmatism in the Columbia Supercontinent: Insights From a 1.77–1.76 Ga Large Igneous Province of the Dunhuang Block, Northwest China

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract Widespread mafic magmatism at ca. 1.8–1.7 Ga across fragments of the Columbia supercontinent records a transition in the Earth's supercontinent cycle. The paleogeographic position of the Dunhuang Block in northwestern China within Columbia, and its role in this tectonic reorganization, remain controversial.
Masumeh Sargazi, Chuan‐Lin Zhang, Xian‐Tao Ye, Zhi‐Hao Song, Hong‐Ran Wang   +4 more
wiley   +1 more source

U–Pb and Sm–Nd geochronology of amphibolites from the Curaçá Belt, São Francisco Craton, Brazil : tectonic implications [PDF]

, 2007
The Curaçá terrane is part of the Itabuna–Salvador–Curaçá (I–S–C) Paleoproterozoic orogen in the São Francisco craton, northeastern Brazil, and comprises supracrustal rocks, gneisses of their probable basement, amphibolites, and mafic-ultramafic Cu ...
Teixeira, João Batista Guimarães, João Batista Guimarães Teixeira, Jorge Henrique Laux, Dantas, Elton Luiz, Laux, Jorge Henrique, Silva, Maria da Glória da, Elton Luiz Dantas, Maria da Glória da Silva, Silva, Luiz José Homem D´El-Rey, Luiz José Homem D'el-Rey Silva   +9 more
core   +1 more source

High-K granites between the Archean Gavião and Jequié blocks, São Francisco craton, Brazil : implications for cratonization and amalgamation of the Rhyacian Atlantica continent.

, 2021
Precambrian terrane boundaries are sites of diverse rock associations and structural complexity. Motions along the boundary zones are commonly related to the construction of ancient large continental masses.
Oliveira, Elson Paiva de, Marinho, Moacyr Moura, Zincone, Stéfano Albino, Ribeiro, Bruno Pinto   +3 more
core   +1 more source

Transpressive dextral shear in the Italva-Itaperuna section, Northern State of Rio de Janeiro, Brazil

Anais da Academia Brasileira de Ciências, 2008
Structural analysis carried out on a segment of the Neoproterozoic Ribeira Belt, southeastern Brazil, show that it represents part of the transpressive dextral orogen related to the Central Mantiqueira Province.
Tiago R. Karniol, Rômulo Machado, Nolan M. Dehler   +2 more
doaj   +1 more source

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

Chromium isotopes track redox fluctuations in Proterozoic successions of the Chapada Diamantina, São Francisco craton, Brazil

, 2022
The Chapada Diamantina region in the São Francisco craton of eastern Brazil is composed of sedimentary successions containing both Mesoproterozoic and Neoproterozoic carbonate levels, making it a key natural laboratory for understanding the fluctuations ...
Uhlein, Gabriel J., Rodrigues, René, Willian Alexandre Lima Moura, Egberto Pereira, de Moura, William Alexandre Lima, René Rodrigues, Gabriel J. Uhlein, Frei, Robert, Caxito, Fabrício A., Fabrício de Andrade Caxito, Robert Frei, Alcides N. Sial, Pereira, Egberto, Sial, Alcides N.   +13 more
core   +1 more source

Experimental models of 'Basement'-controlled salients - application to the proterozoic fold-thrust belt of the quadrilátero ferrífero (Minas Gerais, Southeastern Brazil)

Anais da Academia Brasileira de Ciências, 2003
Scaled sandbox models are used to simulate the development of ´basement´-controlled, salients. We investigate the controlling factors on the development of closed curvatures in map-view, considering constant both the sand pack thickness and the space ...
Caroline J. S. Gomes, Milton Pereira-Filho, Silvia C. M. Braga   +2 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

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