Results 51 to 60 of about 62,283 (208)

The structural setting of the Canaã dos Carajás region and Sossego-Sequeirinho deposits, Carajás – Brazil [PDF]

, 2009
The Carajás Terrane in the Amazon Craton hosts Precambrian Cu-Au deposits with resources larger than 100 million tonnes of ore (e.g. Igarapé Bahia-Alemão, Cristalino, Sossego, 118 and Salobo).
DOMINGOS, FABIO
core  

The Role of Gene Flow in the Diversification of the Monkey Treefrog Complex Across the South American Dry Diagonal

Zoologica Scripta, Volume 55, Issue 4, Page 568-588, July 2026.
ABSTRACT Understanding Neotropical megadiversity remains challenging due to fundamental taxonomic issues, including identifying and describing cryptic species and their distribution, and the limited knowledge of key factors driving biological diversification. Such challenges are especially prominent in diverse clades with high levels of cryptic species,
Felipe Camurugi, Vinícius A. São Pedro, Felipe Magalhães, Marcelo Gehara, Eliana F. Oliveira, Gabriel C. Costa, Frank T. Burbrink, Edward A. Myers, Guarino R. Colli, Miguel T. Rodrigues, Adrian A. Garda   +10 more
wiley   +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

Through the Prism of eDNA: Exploring Cryptic Freshwater Bivalves Diversity in a Mega‐Diverse Tropical Environment

Environmental DNA, Volume 8, Issue 3, May–June 2026.
Extensive eDNA sampling in remote tropical rivers revealed six new species, two of which were later confirmed through traditional surveys and formally described. eDNA also captured basin‐scale haplotype diversity, showing that pristine upstream areas harbor both more species and higher genetic diversity than sites affected by human activities ...
Vincent Prié, Sébastien Brosse, Alice Valentini, Benjamin Adam, Mathieu Rhone, Simon Clavier, Gregory Quartarollo, Manuel Lopes‐Lima   +7 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

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

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

Evidence for strong seasonality in the carbon storage and carbon use efficiency of an Amazonian forest [PDF]

, 2014
The relative contribution of gross primary production and ecosystem respiration to seasonal changes in the net carbon flux of tropical forests remains poorly quantified by both modelling and field studies.
Benoit Burban, Burban, Benoit, Williams, Mathew, Stephane Ponton, Clement Stahl, Damien Bonal, Joana Zaragoza‐Castells, Stahl, Clement, Ponton, Stephane, Patrick Meir, Timothy Charles Hill, Lucy Rowland, Bonal, Damien, Meir, Patrick, Mathew Williams, Zaragoza-Castells, Joana, Rowland, Lucy, Williams, Mathew; id_orcid, Hill, Timothy Charles, Siebicke, Lukas, Lukas Siebicke   +20 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  

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