Results 11 to 20 of about 14,875 (109)

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

open access: yesBrazilian 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   +3 more sources

Petrogenesis of Mafic-Ultramafic Intrusions in the Southern Goiás Magmatic Arc, Central Brazil

open access: yes, 2022
The Americano do Brasil and Mangabal Complexes belong to a cluster of Neoproterozoic mafic-ultramafic intrusions in the southern Goiás Magmatic Arc in Brazil that lies within the Brasília Belt, a complex, long-lived Neoproterozoic Orogen that formed ...
Augustin, Claudia Tharis
semanticscholar   +2 more sources

Metamorphic evolution and P-T path of gneisses from Goiás Magmatic Arc in southwestern Goiás State

open access: yes, 2013
No sudoeste do estado de Goias, as rochas do Arco Magmatico de Goias apresentam associacoes minerais tipicas da facies anfibolito. Calculos termobarometricos mostram que as condicoes P e T para associacoes envolvendo anfibolio + biotita + cianita ...
G. Navarro   +2 more
semanticscholar   +4 more sources

Mafic magmatism associated with the Goiás magmatic arc in the Anicuns region, Goiás, central Brazil: Sm–Nd isotopes and new ID-TIMS and SHIMP U–Pb data

open access: yes, 2004
Rocks exposed in the Anicuns region, in the eastern part of the Goiás magmatic arc, are represented dominantly by amphibolites (metavolcanic and metaplutonic) and metapelitic rocks.
J. Laux   +5 more
semanticscholar   +2 more sources

AIRBORNE GAMMA-RAY SPECTROMETRIC AND MAGNETIC SIGNATURES OF FAZENDA NOVA REGION, EAST PORTION OF ARENÓPOLIS MAGMATIC ARC, GOIÁS

open access: yes, 2014
. Airborne geophysical data are an important tool for the interpretation of geological features. The variations observed in airborne magnetic and gamma-ray spectrometric data are typically used to differentiate geological units and delimit structures. In
Lara N. Ramos, A. Pires, C. L. Toledo
semanticscholar   +2 more sources

Geology and geochemistry of Bois River Suite, Mara Rosa (GO): evidence of magmatic arc paleoproterozoic

open access: yesGeochimica Brasiliensis, 2014
The Bois River Headwaters Suite of, Rosa Mara-Nova Iguaçu (Goiás, Brazil) region, are granitoids to granodioritic and tonalitic with peraluminous characteristics, as distinguished granodiorite VI, granodiorite MU and tonalite SJ, which host gold ...
Said Abdallah
doaj   +2 more sources

Proveniência sedimentar dos segmentos internos da Faixa Paraguai - Domínios paleogeográficos distais de uma margem passiva?

open access: yes, 2023
The Western Gondwana final agglutination is recorded in diachronic Neoproterozoic-Paleozoic orogenic belts with distinct tectonic settings englobing several continental blocks. The Paraguay Belt, the westernmost orogenic arm of the Tocantins Province,
Frugis, Gabriella Labate
core   +1 more source

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