Results 61 to 70 of about 1,323 (166)

The Carrancas Group and the Andrelandia Nappe front in the southern portion of the São Francisco Craton: sedimentary provenance and tectonic implications

, 2011
O Sistema de Nappes Carrancas compõe um sistema de nappes que circunda ao sul o Cráton do São Francisco e é formado pela Unidade Biotita Xisto e pelas formações Campestre e São Tomé das Letras do Grupo Carrancas. A Unidade Biotita Xisto contém veios de
Alice Westin Teixeira, Teixeira, Alice Westin   +1 more
core   +1 more source

Borehole Logging Lithological Classification in Carbonatite‐Hosted Niobium Deposit Integrating Geophysical and Geochemical Data With Self‐Organizing Maps

Geophysical Prospecting, Volume 74, Issue 3, March 2026.
ABSTRACT Lithological classification from borehole data remains challenging in geologically complex alkaline–carbonatite systems, where compositional overlap and gradual transitions between lithotypes limit conventional interpretation methods. This study presents an integrated and automated workflow for drill‐core lithological classification using self‐
Fabrizzio R. Costa, Lívia Namie S. Nishimura, Reginaldo Antonio R. Filho, Bruno P. Milanezi, Dong Yaosong, Cleyton de C. Carneiro, Carina Ulsen   +6 more
wiley   +1 more source

First Precise U-pb Baddeleyite Ages Of 1500ma Mafic Dykes From The São Francisco Craton, Brazil, And Tectonic Implications

, 2015
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)The São Francisco Craton (SFC) is an Archaean-Proterozoic craton that hosts a significant number of mafic intrusions. Previous attempts to date the igneous emplacement of these rocks are
Leal A.B.M., Oliveira E.P., Soderlund U., Ernst R.E., Silveira E.M.   +4 more
core   +1 more source

Diamictites and Sturtian Cap Dolomites Covering the Jacobina Group - Araras, North of Campo Formoso - Bahia [PDF]

Geologia USP. Série Científica, 2008
Occurrences of diamictites with a probable glacial origin underlying limestones north of Campo Formoso – BA around Araras village, had already been described by some authors during the 60´s and 70´s.
Augusto José de Cerqueira Lima Pedreira da Silva, Benjamim Bley de Brito Neves   +1 more
doaj  

Geologic conceptual model of the municipality of Sete Lagoas (MG, Brazil) and the surroundings

Anais da Academia Brasileira de Ciências, 2016
The study area is located in the state of Minas Gerais, Brazil, among the municipalities of Pedro Leopoldo, Matozinhos, and Sete Lagoas, with Velhas River as the eastern boundary.
PAULO GALVÃO, RICARDO HIRATA, ARNALDO CORDEIRO, DANIELA BARBATI, JORGE PEÑARANDA   +4 more
doaj   +1 more source

Does the Cave Environment Limit Functional Diversity? Rethinking Patterns in Oniscidea Assemblages From a Neotropical Karst

Biotropica, Volume 58, Issue 1, January 2026.
Cave habitats strongly filter functional traits, constraining the diversity of terrestrial isopod communities along the epigean–hypogean gradient. Functional turnover decreases while richness differences increase in hypogean systems, reflecting uneven occupation of trait space rather than simple trait replacement.
Rafaela Bastos‐Pereira, Leila A. de Souza, Júlia B. Galo, Rafael C. Cardoso, Rodrigo L. Ferreira   +4 more
wiley   +1 more source

The detrital zircon record of an Archaean convergent basin in the Southern São Francisco Craton, Brazil.

, 2015
Detrital zircon ages are an importanttoolto study the provenance and evolution of sedimentary rocks, and currently there is a general lack of such studies in greenstone belt basins.
Moreira, Hugo Souza, Lana, Cristiano de Carvalho, Nalini Júnior, Hermínio Arias   +2 more
core   +1 more source

Geochemistry of komatiites and basalts from the Rio das Velhas and Pitangui greenstone belts, São Francisco Craton, Brazil: implications for the origin, evolution, and tectonic setting

, 2021
FAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOCNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOThe Neoarchean Rio das Velhas and Pitangui greenstone belts are situated in the southern São Francisco Craton, Minas Gerais ...
Moreno, Juan A., Verma, Sanjeet K., Oliveira, Elson P., Amaral, Wagner S., Silva, Paola M.   +4 more
core   +1 more source

Tectonic Framework of the Arenópolis and Anicuns‐Itaberaí Segments of the Goiás Magmatic Arc Based on 3D Magnetotelluric Inversion

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.
Abstract The Goiás Magmatic Arc (GMA) is a Neoproterozoic juvenile terrain formed through oceanic‐oceanic and oceanic‐continental subduction. It comprises three main segments: Mara Rosa, Anicuns‐Itaberaí (GMAAI), and Arenópolis (GMAA), whose tectonic evolution and connectivity remain uncertain.
J. G. C. Inacio, R. M. Vidotti, R. T. Correa, M. E. Schutesky, S. L. Fontes   +4 more
wiley   +1 more source

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