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BIBTEX RIS

A RADIOATIVIDADE NATURAL DA REGIÃO DE IRECÊ, BA

1992; Sociedade Brasileira de Geologia; Volume: 22; Issue: 2 Linguagem: Inglês

10.25249/0375-7536.1992167174

ISSN

2177-4382

Autores

CLEMIRO FERREIRA, LYCIA M. MOREIRA-NORDEMANN, DANIEL J.R. NORDEMANN,

Tópico(s)

Geography and Environmental Studies

Resumo

REGION OF IRECÊ, BAHIA STATE, BRAZIL.Scintillometric measurements were performed over an area of about 10.000 km 2 in the calcareous region of Irecê (Bahia State, Brazil).Total gamma activity counting rates were found to be between 45 and 80 cps, with amean value of 50 cps, showing a rather homogeneous environmental total radioactivity.Seventy samples of rocks and soils were collected and their concentration of uranium, thorium and potassium were measured by laboratory gamma-ray spectrometry.At the same time iron and manganese rich concretions were sampled and studied, indicating strong correlation of MnO-U and Fe 2 O 3 -Th type.The results obtained were discussed from the point of view of the geochemical behavior of natural radioactive elements and correlated with previous data on underground waters of the region.

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