Results 1 to 10 of about 511 (62)

The tectonic evolution of the Neoproterozoic Brasília Belt, central Brazil: a geochronological and isotopic approach [PDF]

Brazilian Journal of Geology, 2016
: The Brasília Belt is one of the most complete Neoproterozoic orogens in western Gondwana. Rapid progress on the understanding of the tectonic evolution of the belt was achieved due to new U-Pb data, combined with Sm-Nd and Lu-Hf analyses. The evolution
Márcio Martins Pimentel
doaj   +5 more sources

Detrital zircon provenance and paleogeography implications for Furnas Formation in the northwest of Paraná Basin [PDF]

Geologia USP. Série Científica, 2015
In the northwest of the Paraná Basin, between the states of Mato Grosso and Goiás, there are exposures of the Furnas Formation, where the Transbrasiliano Lineament is also recognized.
Thais Borba Santos, Fernando Mancini, Leonardo Fadel Cury, Francisco José Fonseca Ferreira   +3 more
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‘I hate sand … it gets everywhere’—Phanerozoic sedimentary recycling from NW Africa

Basin Research, Volume 35, Issue 1, Page 187-213, February 2023., 2023
Key episodes of zircon formation and sedimentary recycling along the North Gondwana margin since Neoproterozoic times. Abstract Over 10,000 published detrital zircon ages have been reprocessed (applying a +10% normal and reverse concordance range) and analysed to understand the evolution of the detrital zircon record of north‐west Africa during the ...
James Lovell‐Kennedy, Emmanuel Roquette, Stefan Schröder, Jonathan Redfern   +3 more
wiley   +1 more source

Petrography and geochemistry of metamafic rocks intercalated in gneisses from Goiás Magmatic Arc, region of Indiara (GO) [PDF]

Geologia USP. Série Científica, 2015
In Indiara region (GO), dozens of metamafic rocks lenses of various dimensions (metric to kilometric) occur, intercalated in gneisses of the Goiás Magmatic Arc and oriented according to the direction of the main foliation (Sn).
Guillermo Rafael Beltran Navarro, Regiane Andrade Fumes, Antenor Zanardo, Marcos Aurélio Farias de Oliveira, George Luiz Luvizotto   +4 more
doaj   +1 more source

The Araxá Group in the South-Southwest Region of the Goiás State [PDF]

Geologia USP. Série Científica, 2013
In the S – SW region of Goiás State, Brazil, the Araxá Group is constituted of a metasedimentary sequence containing schistoseand gneissic (garnet-biotite-quartz schists, feldspatic garnet-biotite-quartz schists, garnet-biotite-quartz paragneisses,with ...
Guillermo Rafael Beltran Navarro, Antenor Zanardo, Fabiano Tomazini da Conceição   +2 more
doaj   +1 more source

Shrimp U-Pb age and Sr-Nd isotopes of the Morro do Baú mafic intrusion: implications for the evolution of the Arenópolis volcano-sedimentary sequence, Goiás Magmatic Arc

Anais da Academia Brasileira de Ciências, 2003
The Arenópolis volcano-sedimentary sequence is located in the southern part of the Goiás Magmatic Arc and includes a ca. 900 Ma calc-alkaline arc sequence made of volcanic rocks ranging in composition from basalts to rhyolites, metamorphosed under ...
Márcio M. Pimentel, Maria Helena B. M. Hollanda, Richard Armstrong   +2 more
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Thermomagnetic Features of Crust in Southern Parts of the Structural Provinces of Tocantins and São Francisco, Brazil

International Scholarly Research Notices, Volume 2013, Issue 1, 2013., 2013
In the present work we report results of a regional scale investigation of the thermal and magnetic characteristics of the crust in the southern sector of the geologic provinces of Tocantins and São Francisco, Brazil. Updated compilations of aeromagnetic and geothermal data sets were employed for this purpose.
Suze Nei P. Guimaraes, Valiya M. Hamza, G. Casula, Y.-J. Chuo, K. Maamaatuaiahutapu, F. Monteiro Santos   +5 more
wiley   +1 more source

The Vazante and Canastra groups revisited: Sm-Nd and Sr isotopes - evidence for contribution from Tonian intraplate magmatism during passive margin development along the SW São Francisco margin, Brazil

Brazilian Journal of Geology, 2019
Combined Sm-Nd isotope studies and U-Pb ages of detrital zircons have shown significant differences between the provenance patterns of Neoproterozoic metasedimentary successions in the Southern Brasília belt.
Manuela de Oliveira Carvalho, Claudio de Morisson Valeriano, Carla Cristine Aguiar Neto, Gustavo Diniz Oliveira, Monica Heilbron   +4 more
doaj   +1 more source

The Anicuns-Itaberaí volcano-sedimentary sequence, Goiás Magmatic Arc: new geochemical and Nd-S isotopic data [PDF]

Geochimica Brasiliensis, 2017
The Neoproterozoic Anicuns-Itaberaí volcano-sedimentary sequence exposed in the surroundings of Anicuns, western Goiás, comprises a complex association of igneous and supracrustal rocks, which has been divided into: (i) the Córrego da Boa Esperança ...
Jorge Henrique Laux, Márcio Martins Pimentel, Simone Maria C. L. Gioia, Valderez Pinto Ferreira   +3 more
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Geoquímica de Gnaisses do Arco Magmático de Goiás na Região Sul do Estado de Goiás [PDF]

Geologia USP. Série Científica, 2007
Gnaisses graníticos a trondhjemíticos da região de Pontalina, sul do estado de Goiás, mostram composição cálcica acálcio-alcalina, metaluminosa a peraluminosa.
Guillermo Rafael Beltran Navarro, Antenor Zanardo   +1 more
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