Results 71 to 80 of about 14,875 (109)

The 2.26 to 2.18 Ga Arc-Related Magmatism of the Almas-Conceição do Tocantins Domain: An Early Stage of the São Francisco Paleocontinent Assembly in Central Brazil

, 2020
Paleoproterozoic (Rhyacian) rocks dominate within the basement of the Neoproterozoic Brasilia Belt and their genesis has been attributed to the orogenic amalgamation event that assembled the Sao Francisco-Congo paleocontinent from 2.18 to 2.07 Ga ...
A. Saboia, Claudinei Gouveia de Oliveira, E. Dantas, J. Scandolara, P. Cordeiro, J. Rodrigues, I. Sousa   +6 more
semanticscholar   +1 more source

Retrieving geological units with unsupervised clustering of gamma-ray spectrometry data

, 2021
Airborne gamma-ray spectrometry (AGRS) provides valuable insights for geological mapping, mineral exploration, geomorphological studies, and lithological differentiation.
J. Weihermann, M. Ferreira, Luís Gustavo de Castro, F. J. Ferreira, A. Silva   +4 more
semanticscholar   +1 more source

Tonian Intra-Oceanic Magmatism as the source of the Goiás Porphyry Copper-Gold System in the Brasília Orogenic belt: Petrogenesis and Metallogenetic Implications

Journal of the Geological Society
In the Goiás Intra-Oceanic Arc System (Goiás IOAS), Brasília Orogen, Brazil, occurrences of porphyry-type mineral deposits have been identified. The most significant of these is the Chapada Cu-Au deposit (1056 Mt Cu @ 0.24% Au @ 0.12 g/t).
A. Ferreira, Claudinei Gouveia de Oliveira, Ana Paula Schuertz Costa   +2 more
semanticscholar   +1 more source

Petrogenesis of the Córrego das Campinas Gabbro-Anorthosite Suite: Characterization of a Neoproterozoic massif-type anorthosite in the Goiás Magmatic Arc and its significance in the evolution of the Brasília belt, Brazil

Journal of South American Earth Sciences, 2022
Fernando Santos Diener, R. Fuck, N. Botelho, H. J. Polo, M. Pimentel, Tiago Bandeira Duarte, Gabriel Veloso Martineli, J. A. Brod   +7 more
semanticscholar   +1 more source

Metamorphism overprint in mafic-ultramafic cumulates in the Mangabal and Americano do Brasil Complexes, Brasilia Belt, Brazil

Journal of the Geological Society
The Americano do Brasil and Mangabal Complexes belong to a cluster of Neoproterozoic mafic-ultramafic intrusions in the southern Goiás Magmatic Arc in Brazil.
C. Augustin, J. E. Mungall, M. E. Schutesky, Richard E. Ernst   +3 more
semanticscholar   +1 more source

The mantle and crust record of convergent margin deposits – Preliminary results of the MT Brazil Project

Proceedings
The Goiás Magmatic Arc (GMA) evolved between ~900–600 Ma during the Brasiliano Orogeny, involving arc magmatism, craton collisions, and post-collisional processes. Despite insights from airborne geophysics, uncertainties remain about mantle/lower crustal
R. Vidotti, Raphael Correa, J. Inacio, Sergio Fontes, Vanessa Oliveira, M. E. Schutesky, Diego Guilherme da Costa Gomes, William Ribeiro Lopes, A. Saboia, R. Carvalho, Claudinei Oliveira, G. P. D. Silva   +11 more
semanticscholar   +1 more source

THE ANICUNS-ITABERAÍ VOLCANO-SEDIMENTARY SEQUENCE, GOIÁS MAGMATIC ARC: NEW GEOCHEMICAL AND Nd-Sr ISOTOPIC DATA

, 2012
J. Laux, M. Pimentel, S. Gioia, V. Ferreira   +3 more
semanticscholar   +1 more source

Miocene adakitic magmatism and conditions of porphyry metallogenesis in the Gangdese magmatic arc, Tibet

Ore Geology Reviews, 2022
Zhiming Yang, Yuanchuan Zheng
exaly  

The lower crust of the Gangdese magmatic arc, southern Tibet, implication for the growth of continental crust

Gondwana Research, 2020
Zeming Zhang, Huixia Ding, Richard M Palin   +2 more
exaly  

Singularity analysis of igneous zircon U-Pb age and Hf isotopic record in the Zhongdian arc, northwest Yunnan, China: Implications for Indosinian magmatic flare-up and the formation of porphyry copper deposits

Ore Geology Reviews, 2021
Yuanzhi Zhou, Qiuming Cheng, Pingping Zhu   +2 more
exaly