Results 11 to 20 of about 319 (119)

Composition and P-T conditions of the lithospheric mantle beneath the Azimuth 125º Lineament, Northern and Southern Brazil: constraints from peridotite xenoliths enclosed in diamond-bearing kimberlites

open access: yesJournal of the Geological Survey of Brazil, 2022
We present new petrographic and chemical data together with calculated P-T equilibrium conditions of peridotite xenoliths enclosed in kimberlites from Rondônia, Northern Brazil (Cosmos-1 and Carolina-1) and Minas Gerais, Southeastern Brazil (Canastra-1)
Vidyã Vieira Almeida   +4 more
doaj   +1 more source

Provenance and sedimentary analysis of the basal portion of the Bambuí Group at Arcos (MG) [PDF]

open access: yesGeologia USP. Série Científica, 2013
The origin and evolution of Bambuí Basin has been a matter of debate, in much intensified by the recent exploratory efforts carried out by public and private companies looking for natural gas.
Matheus Kuchenbecker   +5 more
doaj   +1 more source

Geoquímica de Gnaisses do Arco Magmático de Goiás na Região Sul do Estado de Goiás [PDF]

open access: yesGeologia 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   +1 more
doaj  

Corrigendum to Unveiling geological complexity in the Serra Dourada Granite using self-organizing maps and hierarchical clustering: Insights for REE prospecting in the Goiás Tin Province, Brasília Belt, Central Brazil

open access: yesJournal of the Geological Survey of Brazil
Refers to: Unveiling geological complexity in the Serra Dourada Granite using self-organizing maps and hierarchical clustering: Insights for REE prospecting in the Goiás Tin Province, Brasília Belt, Central Brazil. Journal of the Geological Survey of
Guilherme Ferreira da Silva   +4 more
doaj   +1 more source

Book Review: The Brasília Belt and Tocantins Province, central Brazil: tectonic evolution and role on the São Francisco Craton and West Gondwana build up – an advanced approach

open access: yesJournal of the Geological Survey of Brazil
Recently, Editora Sorian published the substantial book authored by Luiz José Homem D’el-Rey Silva, entitled The Brasília Belt and Tocantins Province, Central Brazil: Tectonic Evolution and Role in the São Francisco Craton and West Gondwana Build-Up ...
Reinhardt Fuck
doaj   +1 more source

Chemical Characterization of Chromite from the Crominia and Mairipotaba Massifs, Goiás, Brazil [PDF]

open access: yesGeologia USP. Série Científica, 2010
Metaultramafi c bodies tectonically emplaced within the metasedimentary sequence of the Araxá Group are associatedwith an ophiolitic melange in southeast Goiás. In the region of Cromínia - Mairipotaba, they occur as lenticular bodiesaligned E-W. Cumulate
Nélson Angeli   +3 more
doaj  

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

open access: yesBrazilian Journal of Geology
: 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   +1 more source

Brazilian engagement to Asia and the Belt and Road Initiative in 2017: less politics, more trade and investments

open access: yesEstudos Internacionais, 2018
The paper aims to understand Brazilian position in relation to Asia and Belt and Road Initiative (BRI), based on a review of the bibliography and journalistic articles on Brazil-Asia subject and an observance of official data of the Brazilian economy ...
João Paulo Nicolini Gabriel   +2 more
doaj   +1 more source

Kamafugite Magma Pathways and Lava‐Flow Paleotopography From Three‐Dimensional Audiomagnetotelluric Imaging Constrained by Borehole Data

open access: yesEarth and Space Science, Volume 13, Issue 8, August 2026.
Abstract An audiomagnetotelluric (AMT) survey was conducted within the Alto Paranaíba Igneous Province, southeastern Brazil, to delineate shallow occurrences of kamafugite, a rare ultrapotassic volcanic rock worldwide. A dense grid of AMT stations was deployed, allowing the construction of a high‐resolution 3D electrical resistivity model ...
Lucca M. Franco   +6 more
wiley   +1 more source

A mineral potential mapping approach for supergene nickel deposits in southwestern São Francisco Craton, Brazil

open access: yesBrazilian Journal of Geology
: Southwestern São Francisco Craton makes limit with Brasília thrust-fold belt and involves rocks from Archean to formed during the Brasiliano-Pan Africano Neoproterozoic event, including a mafic-ultramafic belt (Morro do Ferro Greenstone Belt) hosted ...
João Gabriel Motta   +1 more
doaj   +1 more source

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