Results 41 to 50 of about 848 (205)

The Encantada Granite: registration of a peraluminous intrusion in the Rondonian Province - San Ignacio, in SW Amazonic Craton, Mato Grosso, Brazil [PDF]

Geologia USP. Série Científica, 2015
The Encantada Granite occurs on the extreme southwest of the state of Mato Grosso, SW of the Amazonian Craton, near the border of Brasil/Bolívia. It corresponds to an body oriented to NNW direction that intruded metasedimentary and metavolcanic rocks ...
Brena Verginassi do Nascimento, Carlos Humberto da Silva, Ana Cláudia Dantas da Costa   +2 more
doaj   +1 more source

Insights on the framework of the Carajás Province, Amazonian Craton, Brazil, and on the three-dimensional shape of the Carajás Basin, based on gravity data

Journal of the Geological Survey of Brazil, 2019
This work interprets and models aerogravity data surveyed in the Carajás Province (also Carajás Domain) - Eastern Amazonian Craton, with the purpose of understanding the deep tectonic framework of this region and sketching the three-dimensional shape of ...
Roberto Gusmão de Oliveira
doaj   +1 more source

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

Morphological and compositional study of quartz and cassiterite of the Mocambo Granite, South Pará Tin Province, Amazonian Craton

Brazilian Journal of Geology, 2020
Quartz and cassiterite crystals of granite, greisens, and quartz veins from Mocambo Granite, Carajás Province, were studied by scanning electron microscopy — cathodoluminescence and electron microprobe. Five types of quartz were identified: Qz1, magmatic
Rubem Santa Brígida Barros Neto, Claudio Nery Lamarão, Gisele Tavares Marques, Cristina Valle Pinto-Coelho   +3 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

Columbia revisited: Paleomagnetic results from the 1790 Ma colider volcanics (SW Amazonian Craton, Brazil)

, 2008
In an attempt to improve our understanding of the Paleoproterozoic geodynamic evolution, a paleomagnetic study was performed on 10 sites of acid volcanic rocks of the Colider Suite, southwestern Amazonian Craton. These rocks have a well-dated zircon U-Pb
Elming, Sten-åke,, Pinho, Francisco E.C.,, JANIKIAN, Liliane, SILVA, Jesue A., BARROS, Marcia A. S., Trindade, Ricardo I.F.,, BISPO-SANTOS, Franklin, D’Agrella-Filho, Manoel S.,, TRINDADE, Ricardo I. F., Janikian, Liliane,, Pacca, Igor I.G.,, Barros, Márcia A.S.,, D`AGRELLA-FILHO, Manoel S., PINHO, Francisco E. C., PACCA, Igor I. G., Bispo-Santos, Franklin,, Silva, Jesué A.,, ELMING, Sten-Ake   +17 more
core   +1 more source

Paleoproterozoic, Mesoproterozoic, and Paleozoic sedimentary successions of the Southwestern Amazonian craton: geochemistry, provenance, and post-sedimentary events

, 2023
The Amazonian Craton is home to many Statherian to Calymmian taphrogenesis events that evolved over Large Igneous Provinces. The NW-SE faults on the Western Amazonian Igneous Belt (1.82–1.74Ga) and their reactivations, which facilitated the deposition of
Elton Luiz Dantas (4627303), Adriana Maria Coimbra Horbe (17178422), Caio César Aguiar Borges (17178428), Matheus S. Simões (17178425), Márcio Fernando dos Santos Albuquerque (17178419)   +4 more
core   +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

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  

Well-preserved Late Paleoproterozoic volcanic centers in the Sao Felix do Xingu region, Amazonian Craton, Brazil

, 2010
The Amazonian craton in the Sao Felix do Xingu city, southeast region of the Para state, north of Brazil, hosts exceptionally well-preserved Paleoproterozoic bimodal magmatic units grouped in the Sobreiro and Santa Rosa formations.
Juliani, Caetano, FERNANDES, Carlos Marcello Dias   +1 more
core   +1 more source