Estudo do potencial mineral do deposito uranifero de Lagoa Real, BA, com base em dados geologicos, aerogeofisicos e de sensoriamento remoto

AUTOR(ES)
DATA DE PUBLICAÇÃO

1999

RESUMO

Integrated analysis of available geological, geophysical and remote sensing data for the Lagoa Real District yielded a large amount of additional data regarding regional geology and ore controI. This district is Brazil s second largest uranium reserve, associated with albitite lenses enc1osed in Mesoproterozoic granitic rocks within the Paramirim block, at the southem portion of the São Francisco Craton. Airbome gammaspectrometry data were useful for delineating known and probable uranium ano malie s. Magnetic data were useful for extraction of regional structural information, indicating discontinuities in the 30°, 70°, 170°, 0° and 140° azimuths, the last two being the main directions of the albitite lens, associated with a regional ductile flexure. Landsat 5 - TM image for the beginning of the dry season enhanced mainly vegetation (savanna type) differences which could be associated to the main lithologic units. Residual soil (c1ay and iron oxides and hydroxides) presented almost no difference due to the widespread lateritic weathering. Landsat lineament statistical analysis was disturbed by random directions. However, comparison with magnetic linear features allowed discrimination ofthe main structural directions

ASSUNTO(S)

processamento digital de imagens - tecnicas digitais landsat (satelites) geofisica uranio

ACESSO AO ARTIGO

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