Determination of weathering rate of the Morro do Ferro Th-REEs deposit, Brazil using U-isotope method

Applied Radiation and Isotopes

Volumn 65, Issue 5, 2007, Pages 474-481

  Bonotto, D M ^a   Fujimori, K ^b   Moreira Nordemann, L M ^c  

^a SÃO PAULO STATE UNIVERSITY UNESP   (Brazil)

^b UNIVERSITY OF SÃO PAULO   (Brazil)

^c INSTITUTO NACIONAL DE PESQUISAS ESPACIAIS   (Brazil)

Author keywords

Brazil; Po os de Caldas plateau; Th REEs deposit; Uranium isotopes; Weathering rate

Indexed keywords

BRAZIL; IMPURITIES; ISOTOPES; ROCKS; SURFACE WATERS; URANIUM;

ACTIVITY RATIO (AR); POCCEDILOS DE CALDAS PLATEAU; TH-REES DEPOSIT; URANIUM ISOTOPES; WEATHERING RATE;

WEATHERING;

ISOTOPE; SURFACE WATER; THORIUM; URANIUM 234; URANIUM 238;

ARTICLE; CLIMATE; POLLUTANT; PRIORITY JOURNAL; RIVER BASIN; STATISTICAL SIGNIFICANCE; WEATHERING;

BRAZIL; ENVIRONMENTAL MONITORING; SOIL POLLUTANTS, RADIOACTIVE; URANIUM; WATER POLLUTANTS, RADIOACTIVE;

EID: 33847721014     PISSN: 09698043     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.apradiso.2006.11.003     Document Type: Article

References (29)

1. Almeida Filho, R., Paradella, W.R., 1977. Estudo do maciço alcalino de Poços de Caldas através de imagens Landsat com ênfase em mineralizações radioativas. Rep. 11/2-TPT/065, Instituto Nacional de Pesquisas Espaciais.
2. Barreto P.M.C., and Fujimori K. Natural analogue studies: geology and mineralogy of Morro do Ferro. Brazil. Chem. Geol. 55 (1986) 297-312
3. Bonotto D.M. The behavior of dissolved uranium in groundwaters of the Morro do Ferro thorium deposit. Brazil. J. Hydrol. 107 (1989) 155-168
4. Bowie S.H.U., and Plant J.A. Natural radioactivity in the environment. In: Thornton I. (Ed). Applied Environmental Geochemistry (1983), Academic Press, London 501pp
5. Bushee J. A geochronological study of the alkaline massif of Poços de Caldas, Brazil. Ph.D. Thesis (1971), University of California, Berkeley
6. Chapman N.A., McKinley I.G., Penna Franca E., Shea M.E., and Smellie J.A.T. The Poços de Caldas project: an introduction and summary of its implications for radioactive waste disposal. J. Geochem. Explor. 45 (1992) 1-24
7. Conceição F.T., and Bonotto D.M. Use of U-isotope disequilibrium to evaluate the weathering rate and fertilizer-derived uranium in São Paulo State, Brazil. Environ. Geol. 44 (2003) 408-418
8. Currie L.A. Limits for qualitative detection and quantitative determination. Anal. Chem. 40 (1968) 586-593
9. Eisenbud M., Krauskopf K., Franca E.P., Lei W., Ballad R., and Linsalata P. Natural analogues for the transuranic actinide elements. Environ. Geol. Water Sci. 6 (1984) 1-9
10. Ellert R. Contribuição à geologia do maciço alcalino de Poços de Caldas. Bol. Geologia FFCL USP 237 (1959) 5-64
11. 226Ra data in surface waters and groundwaters from the Morro do Ferro. Unp. Rep., Universidade Federal do Rio de Janeiro.
12. Frayha R. Urânio e tório no Planalto de Poços de Caldas. Bol. DNPM 116 (1962) 75pp
13. Fujimori, K., 1982. Silicato de terras raras e cheralita, minerais responsáveis pela anomalia no Morro do Ferro, Poços de Caldas (MG). In: Proc. XXXII Congresso Brasileiro de Geologia. SBG (Sociedade Brasileira de Geologia), São Paulo, pp. 669-671.
14. Grimaldi P.Q. Uranium Distribution in Surface Waters at Morro do Ferro and Vicinity. Interoffice Communication (1981), University Medical Center, New York
15. Holmes D.C., Pitty A.E., and Noy D.J. Geomorphological and hydrogeological features of the Poços de Caldas caldera analogue study sites. J. Geochem. Explor. 45 (1992) 215-247
16. IPT (Instituto de Pesquisas Tecnológicas do Estado de São Paulo S.A.), 1982. Estudos para a caracterização do comportamento do lençol freático do Morro do Ferro, Poços de Caldas (MG). Rep. 16423, 16pp.
17. Ivanovich M., and Harmon R.S. Uranium Series Disequilibrium: Applications to Environmental Problems (1982), Oxford University Press, Oxford 571pp
18. Lei W. Thorium mobilization in a terrestrial environment. Ph.D. Thesis (1984), New York University Medical Center, New York
19. MacKenzie, A.B., Scott, R.D., Linsalata, P., Miekeley, N., Osmond, J.K., Curtis, D.B., 1991. Natural radionuclide and stable element studies of rock samples from the Osamu Utsumi mine and Morro do Ferro analogue study sites, Poços de Caldas, Brazil. NAGRA:NTB 90-20, SKB:TR 90-11, UK-DOE:WR 90-042. Poços de Caldas Technical Report Series 7, 185pp.
20. 238U disequilibrium in measuring chemical weathering rate of rocks. Geochim. Cosmochim. Acta 44 (1980) 103-108
21. Moreira-Nordemann L.M. Salinity and weathering rate of rocks in a semi-arid region. J. Hydrol. 71 (1984) 131-147
22. Osmond J.K., and Cowart J.B. The theory and uses of natural uranium isotopic variations in hydrology. At. Energy. Rev. 14 (1976) 621-679
23. Roser, F.X., Cullen, T.J., 1962. Environmental radioactivity in high background areas of Brazil. Tech. Rep., Pontifícia Universidade Católica, Rio de Janeiro, 75pp.
24. Schorscher H.D., and Shea M.E. The regional geology of the Poços de Caldas alkaline complex: mineralogy and geochemistry of selected nepheline syenites and phonolites. J. Geochem. Explor. 45 (1992) 25-51
25. Tolbert, G.E., 1955. Preliminary report on the Morro do Ferro thorium bearing rare-earths deposit, Poços de Caldas plateau, Brazil. Tech. Rep., Conselho Nacional de Pesquisas, Rio de Janeiro.
26. Ulbrich H.H.G.J. A petrografia, estrutura e o quimismo de nefelina sienitos do Maciço Alcalino de Poços de Caldas, MG-SP. Ph.D. Thesis (1984), Universidade de São Paulo, São Paulo
27. 238U in natural waters. Radiochim. Acta 21 (1974) 151-154
28. Waber N., Schorscher H.D., and Peters T. Hydrothermal and supergene uranium mineralization at the Osamu Utsumi mine, Poços de Caldas, Minas Gerais, Brazil. J. Geochem. Explor. 45 (1992) 53-112
29. Wedow, H., 1967. The Morro do Ferro thorium and rare-earth ore deposit, Poços de Caldas District, Brazil. United States Geological Survey Bulletin 1185-D, 35pp.