Jan 13, 2021· At Pedra Branca, 5 distinct PGE+Au deposit areas host, in aggregate, a current Inferred Resource of 1,067,000 ounces 2PGE+Au contained in 27.2 million tonnes grading 1.22 g/t …
Mesoproterozoic paleo-hidrothermal system in the Morro da Pedra Preta Formation, Serra do Itaberaba Group, São Paulo State, Brazil. Revista Brasileira de Geociências, Brasil.
It comprises an amphibolite-facies orogenic gold deposit, hosted by the Paleoproterozoic Serra das Pipocas greenstone belt. Airborne hyperspectral images (ProSpecTIR¿-VS system) covering the Pedra Branca gold deposit, as well as point and imaging spectroscopic data (ASD-Fieldspec® and SisuCHEMA¿ instruments) from representative rock samples ...
PT conditions of the regional retro-metamorphism are very similar to the PT conditions of ~495°C and 2.83 kbar of the mineralization, estimated fluid inclusions data in the Pedra Branca gold deposit.
Jan 13, 2021· At Pedra Branca, 5 distinct PGE+Au deposit areas host, in aggregate, a current Inferred Resource of 1,067,000 ounces 2PGE+Au contained in 27.2 million tonnes grading 1.22 g/t …
Dec 18, 2020· At Pedra Branca, 5 distinct PGE+Au deposit areas host, in aggregate, a current Inferred Resource of 1,067,000 ounces 2PGE+Au contained in 27.2 million tonnes grading 1.22 g/t …
The Pedra Pintada Suite (PPS) outcrops in the northernmost portion of the Roraima State, in the Ventuari-Tapajós Province, Guiana Shield. It comprises I-type, high-K and/or shoshonitic calc ...
Tal estudo envolveu a análise macroscópica e microscópica, em luz polarizada e em lâmina delgada de alguns dos mais de duzentos instrumentos de pedra polida recolhidos. A maior parte deles é de anfiboloxisto, cujos afloramentos mais próximos se situam a mais de 100 km de distância em linha recta, na bordadura ocidental do Maciço ...
At Pedra Branca, 5 distinct PGE+Au deposit areas host, in aggregate, a current Inferred Resource of 1,067,000 ounces 2PGE+Au contained in 27.2 million tonnes grading 1.22 g/t 2PGE+Au (see ValOre's July 23, 2019 news release). All the currently known Pedra Branca inferred PGE resources are potentially open pittable.
Apr 01, 2019· For the associated country rocks of the Pedra Branca gold deposit, metamorphic hornblende from garnet–amphibolite samples have δ 18 O values of +7.7 and +8.1‰, and δD values of −73 and −68‰, corresponding to fluid δ 18 O values of +10.0 and +10.4‰, and fluid δD values of −58 and −54‰, respectively .
Os anfibólios são minerais comuns (principalmente as "hornblendas") e podem ocorrer associados a diversos minerais em função de sua origem (ígnea ou metamórfica). Em muitas rochas metamórficas é comum ocorrerem mais de um tipo de anfibólio. Ocorre associado a piroxênios, plagioclásios, feldspato potássico, quartzo, biotita ...
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Abstract: The Pedra Branca gold deposit is a recent discovery conducted by private exploration projects in the Troia Massif of northern Borborema Province, Northeast Brazil. It comprises an amphibolite-facies orogenic gold deposit, hosted by the Paleoproterozoic Serra das Pipocas greenstone belt.
Pedra Branca is an untapped gem located amidst excellent infrastructure in northeastern Brazil. The maiden Inferred Mineral (4,042,000 t grading 1.38 g/t Au for 180,000 ounces of gold, was calculated utilizing only 42% of the total assay results. South Atlantic's reverse circulation drilling only averaged 40 m …
Mônica M. Perrotta's 3 research works with 9 citations and 180 reads, including: remotesensing-13-03688-s001.zip
Fluid inclusion and stable isotope (O, H, C) constraints on the genesis of the Pedra Branca gold deposit, Troia Massif, Borborema Province, NE Brazil: An example of hypozonal orogenic gold mineralization. ... (amphibolite facies metamorphism), and very little fluid is released above 550 °C (Tomkins, 2010, Tomkins, 2013). This is consistent ...
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Pedra de qualidade superior é extraída, cortada e polida para uso arquitetônico. É usado como revestimento de pedra no exterior de edifícios e como piso e painéis em ambientes fechados. Algumas das peças mais atraentes são cortadas para uso como bancadas. Nestes usos arquitetônicos, o anfibolito é um dos muitos tipos de pedra vendidos ...
Pedra da Luz Mines, Trindade, Vila Flor, Bragança, Portugal : Located 10 kilometers SE of Mirandela. Perigranitic mineralization with lateral zoning around a Hercynian leucogranite : stade 1/near the granite (scheelite, wolframite, molybdenite, bismuth, ...
Hábito. Sua forma de ocorrência é variável. Pode formar agregados colunares, granulares, fibrosos, radiados, asbestiformes (o termo asbesto é sinônimo de amianto), etc. Os cristais são prismáticos curtos a longos, tabulares, laminados, aciculares e/ou fibrosos e, geralmente exibem seções transversais rômbicas ou pseudo-hexagonais.
Petrography and geochemistry of the Pedra Dourada Granulite, southeastern Minas Gerais, Brazil By Kassia de Souza Medeiros Marinho (6148388), Hanna Jordt-Evangelista (6126926) and Marcelo de Souza Marinho (6135029)
The metamorphic conditions present during the development of 'S IND.1' and 'S IND.2' were in the amphibolite facies and during the development of the 'S IND.3', in the amphibolite facies grading to the green schists facies, this one typically associated with retrometamorphism of assemblages of …
Metal source and fluid-rock interaction in the Archean BIF-hosted Lamego gold mineralization: Microthermometric and LA-ICP-MS analysis of fluid inclusions in …
Os Artefactos de Pedra Polida do Almonda ao Zêzere - tese de mestrado. Julio Pereira. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 36 Full PDFs related to this paper. Read Paper. Os Artefactos de Pedra Polida do Almonda ao Zêzere - tese de mestrado.
rocks and amphibolite facies paragneisses. The Urariqüera Complex is an amphibolite facies orthogneiss unit including amphibolites and granitoid. Based on reconnaissance field data, the Parima Group was interpreted as a greenstone belt of Archean (Pinheiro et al., 1981) or Paleoproterozoic (Reis et al., 1994; Gaudette et al., 1996) age.
Os Artefactos de Pedra Polida do Almonda ao Zêzere - tese de mestrado. By Julio Pereira. Contributo para a definição das práticas funerárias neolíticas e calcolíticas no Maciço Calcário Estremenho. 3: um machado votivo de talão perfurado proveniente da gruta da …
Pedra da Boca Pedra da Boca is situated at the border between the states of Paraiba and Rio Grande del Norte, with the main cluster of domes located just south of this border which runs along the Curimataú river (Fig. 2b). The nearest larger town is Passa e Fica,some4kmtoNE,whereasthecityofNatalisca.90km to NE.
The Morro da Pedra Preta Formation is crosscut by quartz veins that contain both intermediate schorl-dravite and an alkali-deficient, Cr-(V-)bearing tourmaline, in which the occupancy of the X-site is 0 . 51 Ca 0 . 33 Na 0 . 15, characterizing it as intermediate to foitite and magnesiofoitite end-
Jan 15, 2021· At Pedra Branca, 5 distinct PGE+Au deposit areas host, in aggregate, a current Inferred Resource of 1,067,000 ounces 2PGE+Au contained in 27.2 million tonnes grading 1.22 g/t …
May 22, 2019· Bibliografia: Artigo: Point and imaging spectroscopy investigations on the Pedra Branca orogenic gold deposit, Troia Massif, Northeast Brazil: Implications for mineral exploration in amphibolite metamorphic-grade terrains Autores: João Luís Carneiro Naleto, Mônica Mazzini Perrotta, Felipe Grandjean da Costa, Carlos Roberto de Souza Filho
The metamorphic grade corresponds to the lower amphibolite facies. Mineralization (disseminated, fine-grained, pyrite-arsenopyrite and pyrrhotite) occurs in conjunction with foliation-parallel mm-cm scale quartz stringers consistently mapped along the entire mineralized structure. Grades and thicknesses do vary along strike according to the ...
O presente trabalho visa o estudo geológico e petrográfico da região da Serra das Flechas, localizada na parte oeste do município de Pedra Lavrada, no Estado da Paraíba. Tendo em vista o potencial de recursos minerais e consequente caráter exploratório da região, a execução do mapeamento geológico, na escala de 1:30.000, juntamente com a análise petrográfica dos litotipos ...
