Results 51 to 60 of about 3,579 (174)

Trace-element composition of pyrite and its implications for hydrothermal process within the Mesoproterozoic metasedimentary sequences of the São Francisco Craton, northeastern Brazil

Geologia USP. Série Científica, 2022
The distribution of trace elements in pyrite has been documented for the first time in quartz veins hosted in the Mesoproterozoic metasedimentary sequence of the Tombador Formation, São Francisco Craton, northeast Brazil.
Marilane Gonzaga de Melo, Éder Carlos Moreira, Fábio Simplicio, Gláucia Nascimento Queiroga, Letícia Garcia D’Agostim, Marco Paulo de Castro   +5 more
doaj  

Detrital zircon records of the Paleo-Mesoproterozoic rift-sag Tamanduá Group in its type-section, Northern Quadrilátero Ferrífero, Minas Gerais, Brazil

Brazilian Journal of Geology, 2020
The Quadrilátero Ferrífero metallogenetic province is located in the southernmost portion of the São Francisco craton, SE Brazil. The Tamanduá and Cambotas ridges stand out topographically in the northeastern portion of Quadrilátero Ferrífero and show NE-
Luiz Fernandes Dutra, Sérgio Patusco Dias, Maximiliano Martins, Cristiano Lana, Ana Carolina Batista, Tulio Delôgo Tavares   +5 more
doaj   +1 more source

Geological and structural markers of the eastern Borborema Province based on a geotransect covering the Paraíba, Pernambuco, Alagoas and Sergipe states, northeastern Brazil

Journal of the Geological Survey of Brazil, 2020
This study comprises a field investigation of a NE-SW geological transect along the Eastern Borborema Province in NE Brazil. The transect covered distinct geological domains that differ in a number of aspects, being bounded by shear zones.
Haroldo Monteiro Lima, Lauro Cesar Montefalco de Lira Santos, Roberto Max de Argollo, Edilton Santos   +3 more
doaj   +1 more source

Contribution to the study of the Paleo and Mesoproterozoic magmatism of the SW Amazonian craton based on stable isotopes of O, H and S [PDF]

, 2008
Os isótopos estáveis de O, H e S foram utilizados para investigar a origem das rochas magmáticas nos Terrenos Jauru e Pontes e Lacerda do SW do Craton Amazônico, estado de Mato Grosso, Brasil.
GERALDES, Mauro Cesar, Teixeira, Wilson, VALLADARES, Claudia Sayão   +2 more
core   +2 more sources

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

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

Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil) [PDF]

, 2006
The Campo Formoso stratiform intrusive complex, in Bahia State, Brazil, considered to be of Paleoproterozoic age, consists of a tabular body of ultramafic rocks about 40 km long and 100-1100 m wide.
Garuti, G., Instituto Andaluz de Ciencias de la Tierra, Martin, R. F., Zaccarini, F.   +3 more
core   +2 more sources

Confronting Episodic vs. Continuous Heat Sources in Long‐Lived Hot Orogens: Insights From Petrochronological Studies in the Nova Venecia Complex, Araçuaí Orogen (SE Brazil)

Journal of Metamorphic Geology, Volume 43, Issue 9, Page 863-890, December 2025.
ABSTRACT Orogenic belts that sustain elevated temperatures at intermediate crustal depths for tens of millions of years are known as hot orogens. The evolution of these hot orogens is largely influenced by thermal maturation, primarily driven by the distribution of heat‐producing elements (HPEs), such as K, Th and U in the overthickened crust.
Lucas R. Schiavetti, Vinicius T. Meira, Sean Mulcahy, Jeffrey D. Vervoort, Peter L. Baker, George L. Luvizotto, Ricardo I. F. Trindade   +6 more
wiley   +1 more source

The development of magmatism along the Cameroon Volcanic Line: evidence from seismicity and seismic anisotropy [PDF]

, 2014
The Cameroon Volcanic Line (CVL) straddles the continent-ocean boundary in West Africa but exhibits no clear age progression. This renders it difficult to explain by traditional plume/plate motion hypotheses; thus, there remains no consensus on the ...
Bastow, I.D., Chambers, E.L., De Plaen, R.S.M., Gallacher, R.J., Keane, J., Keir, D.   +5 more
core   +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