English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

. Nuclebras and Comissao Nacional de Energia Nuclear (CNEN) investigated northeastern Goias State, Brazil, in the 1970s and 1980s to detect radioactiveelements, when the Rio Preto and Campos Belos prospective uranium projects were undertaken. These projects identified an estimated 1,000 tons of U3O8, which wasconsidered small and, therefore, search was interrupted in these areas. In 2006, an airborne geophysical survey covered these areas with gamma ray spectrometry andmagnetometry data. Aerogeophysical data has been widely used in the direct detection of uranium mineralized bodies. However, in areas of great lithological variability,the determination of the anomalous values becomes difficult because uranium concentration is significantly influenced by the rock type. The objective of this study isto evaluate the multiple linear regression technique applied to the aerogeophysical data that cover the anomalous lithological units of uranium in northeastern Goias,using the methodology proposed by Pires et al. (2010), to mitigate the influence of lithology on the uranium concentrations. The results demonstrate the effectivenessof the proposed methodology for the removal of lithological influences on the uranium levels, highlighted the known uranium occurrences in the region and identifiednew prospective targets for this radioelement. Keywords: gamma ray spectrometry, magnetometry, anomaly enhancement, Ticunzal Formation, Aurumina Suite. RESUMO. A regiao nordeste do Estado de Goias foi investigada pela Nuclebras e pela Comissao Nacional de Energia Nuclear (CNEN) nas decadas de 1970 e 1980 comvistas a detectar elementos radioativos, ocasiao em que foram empreendidos os projetos prospectivos de urânio Rio Preto e Campos Belos. Tais projetos identificaram mineralizacoes uraniferas estimadas em cerca de 1.000 toneladas de U3O8, que foram consideradas de pequeno porte, portanto, foram interrompidos os trabalhos depesquisa. Em 2006 foi executado um levantamento aerogeofisico que recobriu as areas destes projetos com dados de gamaespectrometria e magnetometria. Dados aerogeofisicos tem sido amplamente utilizados na deteccao direta de corpos mineralizados em urânio. Entretanto, a determinacao de valores a serem considerados anomalos torna-se dificil para areas de grande variabilidade litologica, pois a concentracao de urânio e significativamente influenciada pelo tipo de rocha. O objetivodo presente trabalho e avaliar a tecnica de regressao linear multipla aplicada aos dados aerogeofisicos que recobrem as unidades litologicas anomalas em urânio nonordeste de Goias, utilizando a metodologia proposta por Pires et al. (2010), para atenuar a influencia litologica sobre as concentracoes de urânio. O resultado demonstroua eficacia da metodologia proposta na remocao de influencias litologicas sobre os teores de urânio, como tambem realcou as ocorrencias de urânio conhecidas na regiao e identificou novos alvos prospectivos para este radioelemento. Palavras-chave: gamaespectrometria, magnetometria, realce de anomalias, Formacao Ticunzal, Suite Aurumina

URANIUM PROSPECTING IN NORTHEASTERN GOIÁS STATE, BRAZIL: MULTIPLE REGRESSION APPLIED TO AIRBORNE GEOPHYSICAL DATA