Results 41 to 50 of about 200 (171)

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  

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

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, we performed detailed sedimentological investigations and U-Pb dating of detrital zircon in four ...
Rossignol, Camille, Siciliano Rego, Eric, Narduzzi, Francesco, Teixeira, Lívia, Ávila, Janaína, Silva, Marco, Lana, Cristiano, Philippot, Pascal   +7 more
openaire   +7 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  

Reflectance spectroscopy applied to mapping the hydrothermal alteration at the Mamão gold deposit, Andorinhas Greenstone Belt, Carajás Mineral Province, Northern Brazil [PDF]

Brazilian Journal of Geology
The Mamão gold deposit is located in the eastern portion of the Amazonian Craton, Northern Brazil, and hosted in Archean metamafic rocks of the Andorinhas greenstone belt. Troy Resources Ltd.
Sebastião Rodrigo Cortez de Souza, Diego Fernando Ducart, Nilson Francisquini Botelho   +2 more
doaj   +1 more source

Depositional Interplay Between the Ancestral Rocky Mountains and Ouachita–Marathon–Sonora Orogenies: Insights From Provenance Records in the Late Palaeozoic Marfa Basin, West Texas, USA

Basin Research, Volume 38, Issue 2, March–April 2026.
Provenance records from the late Palaeozoic Marfa Basin in West Texas reveal the transition from the Ancestral Rocky Mountains to the Ouachita–Marathon–Sonora orogenies during the early Permian in SW Laurentia. ABSTRACT The Marfa Basin in West Texas is a late Palaeozoic synorogenic depocenter associated with regional deformation linked to the Ancestral
Sandra Juárez‐Zúñiga, Daniel F. Stockli, Benjamin Johnson, Timothy F. Lawton   +3 more
wiley   +1 more source

Relics of ophiolite-bearing accretionary wedges in NE Brazil and NW Africa: Connecting threads of western Gondwana´s ocean during Neoproterozoic times

Geosystems and Geoenvironment, 2023
Neoproterozoic breakup of Rodinia resulted in the formation of several oceanic realms between dispersing cratons, which were later consumed during the assembly of Gondwana. In its western portion, the interior orogenic belts of Gondwana formed during the
Lauro Cézar M. de Lira Santos, Fabrício A. Caxito, Merlain H. Bouyo, Sonia Ouadahi, Kawther Araïbia, Geysson A. Lages, Glenda L. Santos, João Paulo A. Pitombeira, Peter A. Cawood   +8 more
doaj   +1 more source

Evolution of Terrestrial Planetary Bodies and Implications for Habitability

Reviews of Geophysics, Volume 63, Issue 4, December 2025.
Abstract The terrestrial planetary bodies of our solar system—Mercury, Venus, Earth, and Mars—share a common origin through nebular accretion and early magma ocean differentiation, yet they diverged significantly in geological evolution, tectonic regimes, and habitability.
Peter A. Cawood, Eva E. Stüeken, Priyadarshi Chowdhury, Chris J. Hawkesworth, Jacob A. Mulder   +4 more
wiley   +1 more source

Machine Learning Model for Assessing Melting Pressure Conditions of the TTG Genesis: Implications for the Timing of the Onset of Global Plate Tectonics

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.
Abstract Understanding the pressure conditions of the formation of tonalite‐trondhjemite‐granodiorite (TTG) series rocks is important, as these rocks are key constituents of the Archean continental crust. However, the detailed pressure history of Archean TTG gneisses remains ambiguous due to uncertainties surrounding their sources and the effects of ...
Denggang Lu, Jia Liu, Qunke Xia, Zhikang Luan, Jingjun Zhou, Kailong Yang, Eero Hanski   +6 more
wiley   +1 more source

The Rio Dourado Intrusive Suite - 1.88 Ga A-type Granite - Southeastern Amazonian Craton - Mato Grosso - Brazil [PDF]

Geologia USP. Série Científica, 2011
The Rio Dourado Intrusive Suite (RDIS) is composed of granitic rocks which are exposed in the southeastern AmazonCraton, Central Amazon Province. These granites intruded into the Paleoproterozoic granites of the Vila Rica IntrusiveSuite.
Márcia Aparecida de Sant’Ana Barros, Márcio Martins Pimentel, Mara Luiza Barros Pita Rocha, Fernanda Rodrigues da Silva, Rosilene Aparecida Padilha, Elton Luiz Dantas, Evelin de Moura   +6 more
doaj