Assinatura Geofísica dos Complexos Alcalinos Fazenda Buriti e Arenópolis, porção norte da Província Alcalina de Goiás

Feitoza, Lorena Malta; Carmelo, Adriana Chatack; Huelsen, Mônica G. Von; Freitas, Michelle A. R.

doi:10.1190/sbgf2011-140

12th International Congress of the Brazilian Geophysical Society &Amp; EXPOGEF, Rio De Janeiro, Brazil, 15–18 August 2011 2011

DOI: 10.1190/sbgf2011-140

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Assinatura Geofísica dos Complexos Alcalinos Fazenda Buriti e Arenópolis, porção norte da Província Alcalina de Goiás

Lorena Malta Feitoza

Adriana Chatack Carmelo

Mônica G. Von Huelsen

et al.

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2024

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Geophysical Methods Applied to the Mineralization Discovery of Rare-Earth Elements at the Fazenda Buriti Alkaline Complex, Goiás Alkaline Province, Brazil

dos Santos,

Leão-Santos,

Borges

et al. 2024

Minerals

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In this case study, exploratory techniques were applied for the selection of potential targets for rare-earth elements (REEs) in the Fazenda Buriti Mafic–Ultramafic Complex, part of the Goiás Alkaline Province. The results of the processing and interpretation of aeromagnetic and radiometric data associated with the direct measurements of magnetic susceptibility and radiometry in rock samples collected in the study area allowed for the characterization and delimitation of the geological units. The application of Boolean logic in the radiometric data of uranium (U), thorium (Th), and the U/Th ratio allowed for the generation of a prospective map with the delimitation of two exploration targets. A 100 m deep exploratory drill hole was drilled at the main target, intercepting REE mineralization and validating the developed prospective technique. The results contributed to the detailing of a 1:25,000 scale geological map and the interpretation of shallow and deep magnetic structures. Petrophysical data allowed for the estimation of the magnetite content in the main units of the study area. The delimitation of targets with the applied method proved to be efficient after positive geochemical results for REE from the drilled rocks. The total sum of ∑REEs reached 19,629 ppm in the superficial part of the hole and 3,560 ppm in the fresh rock. Mineralogical results in two follow-up drill core samples indicated that monazite was the main REE mineral. Total REE ranged from 34,746 ppm in HG1 to 30,017 ppm in HG2, with LREEs in its majority. The bulk and clay XRD analyses indicated that monazite consisted of 5.7% (HG1) and 5.1% (HG2). The mineral abundance from the TIMA-X analysis indicated 4.2% (HG1) and 4.4% (HG2) in monazite content.

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Geophysical Methods Applied to the Mineralization Discovery of Rare-Earth Elements at the Fazenda Buriti Alkaline Complex, Goiás Alkaline Province, Brazil

dos Santos,

Leão-Santos,

Borges

et al. 2024

Minerals

View full text Add to dashboard Cite

show abstract

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Assinatura Geofísica dos Complexos Alcalinos Fazenda Buriti e Arenópolis, porção norte da Província Alcalina de Goiás

Cited by 1 publication

References 15 publications

Geophysical Methods Applied to the Mineralization Discovery of Rare-Earth Elements at the Fazenda Buriti Alkaline Complex, Goiás Alkaline Province, Brazil

Geophysical Methods Applied to the Mineralization Discovery of Rare-Earth Elements at the Fazenda Buriti Alkaline Complex, Goiás Alkaline Province, Brazil

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