Characterisation of Components of Waste Rock Piles of Future Uranium Mining Activities in Brazil Using INAA and Statistical Data Treatment

E.A.N. Fernandes; F.S. Tagliaferro; P. Bode; M.A. Bacchi; G.A. Sarriés

doi:10.1023/a:1006727100798

Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 244: Issue 3

Characterisation of Components of Waste Rock Piles of Future Uranium Mining Activities in Brazil Using INAA and Statistical Data Treatment

Authors:

E.A.N. Fernandes

E.A.N. Fernandes Universidade de São Paulo, CENA/USP Centro de Energia Nuclear na Agricultura Caixa Postal 96 13400-970 Piracicaba, SP Brazil

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F.S. Tagliaferro

F.S. Tagliaferro Universidade de São Paulo, CENA/USP Centro de Energia Nuclear na Agricultura Caixa Postal 96 13400-970 Piracicaba, SP Brazil

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P. Bode

P. Bode Delft University of Technology Interfaculty Reactor Institute Mekelweg 15 2629JB Delft The Netherlands

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M.A. Bacchi

M.A. Bacchi Universidade de São Paulo, CENA/USP Centro de Energia Nuclear na Agricultura Caixa Postal 96 13400-970 Piracicaba, SP Brazil

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, and

G.A. Sarriés

G.A. Sarriés ESALQ/USP Departamento de Ciências Exatas Avenida Pádua Dias 11 CP 9 13400-970 Piracicaba, SP Brazil

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Pages:: 595–598

Online Publication Date:: 01 Nov 2004

Publication Date:: 17 Jun 2000

Article Category:: Research Article

DOI:: https://doi.org/10.1023/a:1006727100798

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Abstract

In a preliminary study performed with the waste rocks from the future uranium mine to be explored in Brazil, 106 samples were taken from the eight main lithologies found in the massif and analysed by instrumental neutron activation analysis (INAA) for 20 elements. For samples from the same lithology, a high variability in the concentration of most of the elements was found (coefficient of variation larger than 20%), which might be attributed to either insufficient homogenisation of minerals or to local variation within lithology. The hypothesis that the variability within the lithology does not have an influence to the total variability was tested by analysing 5 replicates of the 5 most contrasting samples from the predominant lithology (plagioclase-microcline-gneiss), chosen after applying statistical evaluation (principal components and cluster analyses). Results indicated that homogenisation of samples was adequate due to low variation among replicates. The hypothesis tested was rejected with a confidence level higher than 99% for all the elements, corroborating the large intra-lithology variability.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)