Amazon Craton
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Stratigraphy, petrography and tectonics of the manganese-bearing Buritirama Formation, Northern Carajás Domain, Amazon Craton
Abstract The Buritirama Formation (BF) occurs at the extreme north of the Carajás Province, close to the contact with the Bacajá domain, in the southeastern portion of the Amazon Craton (Brazil). The BF consists of a 40 km long, ca. 3 km wide NW-SE trending structure arranged in four imbricated thrusts that individualize three main stratigraphic units. The
Braz. J. Geol.. Publicado em: 15/04/2019
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2. Sedimentology and stratigraphy of Neoproterozoic-lower Paleozoic carbonate-siliciclastic succession of the southwesternmost Amazon Craton, state of Rondônia, Brazil
ABSTRACT: Facies and stratigraphic analysis were carried out in Neoproterozoic-Lower Paleozoic carbonate-siliciclastic deposits of Cacoal and Pimenta Bueno formations exposed on basement rocks and into the Pimenta Bueno Graben, northwestern portion of Parecis Basin, southwesternmost Amazon Craton. The redescription and redefinion of this succession confirmed
Braz. J. Geol.. Publicado em: 22/02/2018
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3. Caracterização geológica e metalogenética do depósito X1 : Província Aurífera de Alta Floresta, região de Matupá (MT) / Geological and metallogenic characterization of deposit X1 : alta floresta gold province, region Matupá (MT)
Depósitos auríferos na Província Aurífera de Alta Floresta (PAAF), localizada no centro-sul do Craton Amazônico, extremo norte do Estado de Mato Grosso, geralmente hospedam-se em suítes graníticas geradas em ambiente de arcos magmáticos que se desenvolveram e se agregaram progressivamente no decorrer do Paleoproterozóico (1,98 Ga - 1,87 Ga). A miner
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/04/2012
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4. Processamento e modelagem de dados geofísicos e imagens ASTER aplicados à interpretação geológica e prospecção mineral na Província Aurífera de Alta Floresta, MT / Processing and modeling of geophysical data and ASTER images applied to geological interpretation and mineral exploration in the Alta Floresta Gold Province, MT
The Alta Floresta Gold Province (AFGP) is located in the central-southern Amazon craton between the limits of the Ventuari-Tapajos (1.95-1.8 Ga) and Rio Negro-Juruena (1.8-1.55 Ga) provinces. In its eastern segment there are more than one hundred gold deposits hosted in volcanic and plutonic rocks and concentrated along the Peru-Trairao Belt in a NW-SE direc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
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5. Petrologia e geocronologia do complexo máfico-ultramáfico trincheira, sudoeste do cráton amazônico: implicações tectônicas do mesoproterozóico
The tectonic framework of the ultramafic-mafic rocks of the southwestern Amazon Craton is generally little known. Most of work this cratonic portion is focused on the geochronological studies of granitoids, so that little is known about the origin and tectonic significance of these rocks. In this context, this study contributes to the knowledge of the tecton
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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6. Depósitos auríferos associados ao magmatismo granítico do setor leste da Província de Alta Floresta (MT), Craton Amazônico: tipologia das mineralizações, modelos genéticos e implicações prospectivas / Granitoid-related gold deposits in the Alta Floresta Gold Province (MT), Amazon Craton: ore-forming processes, genetic models and implications to exploration
A Província Aurífera de Alta Floresta, porção centro-sul do Craton Amazônico, localiza-se entre os limites das províncias geocronológicas Ventuari - Tapajós (1,95-1,8 Ga) e Rio Negro - Juruena (1,8-1,55 Ga). Corresponde a uma unidade tectônica essencialmente composta por sequências plutono-vulcânicas geradas em ambiente de arcos magmáticos que se
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2011
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7. Diferenças entre os depósitos auríferos do Grupo Aguapei (Estado de Mato Grosso) e os exemplos de ouro em conglomerados
Gold prospects in the Aguapeí Folded Belt are situated in the southwestern portion of the Amazon Craton, within the Alto Guaporé Province, southwestern state of Mato Grosso. The mineralizations are mainly concentrated in the Pau-a-Pique Deposit (south), Lavrinha Region (central), and São Vicente Mine (north). Gold ore comprises quartz veins and disseminat
Publicado em: 2010
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8. Seismic tomography with P- and S-waves for the study of the upper mantle in Brazil / Tomografia sísmica com ondas P e S para o estudo do manto superior no Brasil
We used travel time seismic tomography to study the upper mantle beneath SE and Central Brazil. This method is based on the inversion of P- and S-wave relative travel time residuals (VanDecar, 1991) obtained from more than 80 stations in an area of 20 x 20 degrees. More than 11000 P and PKP residuals, and more than 8000 S, ScS, SKS, and SKKS residuals were o
Publicado em: 2008
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9. Mapeamento do potencial mineral para niquel e ouro no Cinturão Metassedimentar Nova Brasilandia - Rondonia por meio de logica nebulosa (fuzzi) e redes neurais artificiais / Mineral potential mapping for nickel and gold in Nova Brasilandia Metassedimentar Belt - Rondonia trough fuzzy logic and artificial neuraL networks
Analysis and integration of spatial data from different natures, particularly on Geographic Information Systems (GIS), is a well known technique in mineral prospection. The available tools and other ones recently developed can help prospection campaigns where there is not enough geologic and metalogenetic knowledge, as the Nova Brasilândia Metassedimentar B
Publicado em: 2008
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10. Paleomagnetic Study of Colider Paleoproterozoic Suite and Associated Mafics, Southwestern Amazonian Craton / Estudo Paleomagnético da Suíte Paleoproterozóica Colíder e Máficas Associadas, Sudoeste do Cráton Amazônico
This work presents a paleomagnetic study perfomed on felsic volcanic rocks of the Colider Suite (5 oriented cores and 42 oriented hand samples, 12 sites), Flor da Serra and Guadalupe mafic rocks (75 oriented cores and 3 oriented hand samples, 11 sites). These units are situated in the northern Mato Grosso State (southwestern Amazonian Craton), close to the A
Publicado em: 2007
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11. EVOLUÇÃO TECTONOSSEDIMENTAR DA BACIA DOS PARECIS AMAZÔNIA
The Parecis basin is located in central-western Brazil, on the southwestern part of the Amazon craton, between the Rondônia and Guaporé fold belts. From west to east, the Parecis basin can be divided into three tectono-sedimentary domains: a tectonic low to the west, a central compartment characterized by a negative gravimetric anomaly, and a interior sag
Publicado em: 2007
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12. Integração digital de imagens de radar e LANDSAT-TM com dados geológicos e aerogamaespectrométricos no auxílio ao mapeamento geológico da região do Complexo Granítico Estrela - Pará (PA) / Radar, geologic, airborne gamma ray and LANDSAT-TM digital data integration for geological mapping of the Estrela Granite Complex (PA).
This work is focused on the geotectonic context of the Carajás Mineral Province, Amazon Craton, which represents the most important Brazilian Mineral Province and hosts iron, cooper, gold, manganese and nickel deposits. At the end of Archean age, during the tecno-metamorphic evolution, moderated alkaline granitoids were generated, such as, Estrela Granite C
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/03/2002