1887
Volume 64, Issue 1
  • E-ISSN: 1365-2478

Abstract

ABSTRACT

The Catalão I alkaline–carbonatite complex, which is located in Central Brazil, is one of the main producers of niobium and phosphates in the world. It has been intensely studied geologically and geochemically for its economic potential. This work presents a geophysical analysis over this complex, identifying its behaviour in the subsurface and in portions that have not been explored yet. Different geophysical methods and techniques were applied to achieve the most reliable results possible: at the surface, through radiometric, geological, and topographic data, and at depth, by geological, magnetic, and gravimetric data. The analysis was successfully completed with inversions of gravity and magnetic data that resulted in quite similar models, both in volume and shape. Their density and magnetic susceptibility contrasts were consistent with the expected dunite–pyroxenite lithology from the original mafic intrusion and indicated (by exclusion) the volume of the carbonatite body, which along with the known contents of phosphates and niobium allowed an indirect estimate of the reserves and resources of the complex.

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2015-12-15
2024-04-27
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References

  1. AlmeidaF.F.M.1983. Relações tectônicas das rochas alcalinas mesozoicas da região meridional da Plataforma Sul Americana. Revista Brasileira de Geociências16, 325–349.
    [Google Scholar]
  2. AmaralG., BornH., HadlerJ.C., IunesP.J., KawashitaK., MachadoD.L.et al. 1997. Fission track analysis of apatites from São Francisco craton and Mesozoic alkaline‐carbonatite complexes from central and southeastern Brazil. Journal of South America Earth Sciences10, 285–294.
    [Google Scholar]
  3. BiondiJ.C.2003. Processos Metalogenéticos e Os Depósitos Minerais Brasileiros. Oficina de Textos.
    [Google Scholar]
  4. BrodJ.A., GibsonA.S., ThompsonR.N., Junqueira‐BrodT.C., SeerH.J., De MoraesL.C.et al. 2000. The Kamafugite‐Carbonatite Association in The Alto Paranaíba Igneous Province (APIP) Southeastern Brazil. Revista Brasileira de Geociências30(3), 408–412.
    [Google Scholar]
  5. BrodJ.A., RibeiroC.C., GasparJ.C., Junqueira‐BrodT.C., BarbosaE.S.R., RiffelB.F., et al. 2004. Excursão 1. Geologia e mineralização dos complexos alcalino‐carbonatíticos da Província Ígnea do Alto Paranaíba. 42nd Congresso Brasileiro de Geologia, Araxá, Brazil, Guide Tours, 1–29.
  6. CarvalhoW.T. and BressanS.R.1981. Depósitos Minerais Associados ao Complexo Ultramáfico‐Alcalino de Catalão I – Goiás. In: Os Principais Depósitos Minerais da Região Centro Oeste, Vol. 6 (ed W.H.Schmaltz), pp. 139–183. DNPM.
    [Google Scholar]
  7. CordaniR. and ShukowskyW.2009. Virtual Pole from Magnetic Anomaly (VPMA): A procedure to estimate the age of a rock from its magnetic anomaly only. Journal of Applied Geophysics69(2), 96–102.
    [Google Scholar]
  8. CordeiroP.F.O., BrodJ.A., PalmieriM., OliveiraC.D., BarbosaE.S.R., SantosR.V.et al. 2011. The Catalão I niobium deposit, central Brazil: Resources, geology and pyrochlore chemistry. Ore Geology Reviews41, 112–121.
    [Google Scholar]
  9. FediM., FlorioG. and RapollaA.1994. A method to estimate the total magnetization direction from a distortion analysis of magnetic anomalies. Geophysical Prospecting42, 3, 261–274.
    [Google Scholar]
  10. FediM. and FlorioG.2001. Detection of potential fields source boundaries by enhanced horizontal derivative method. Geophysical Prospecting49, 40–58.
    [Google Scholar]
  11. GibsonS.A., ThompsonR.N., LeonardosO.H., DickinA.P. and MitchellJ.G.1995. The Late Cretaceous impact of the Trindade mantle plume: evidence from large‐volume, mafic, postassic magmatism in SE Brazil. Journal of Petrology36, 189–229.
    [Google Scholar]
  12. GierthE. and BaeckerM.L.1986. A mineralização de nióbio e as rochas alcalinas associadas no complexo Catalão I, Goiás. In: Principais depósitos minerais do Brasil, Vol. 2 (ed. C.Schobbenhaus), pp. 456–462. MME/DNPM.
    [Google Scholar]
  13. GomesC.B., RubertiE. and MorbidelliL.1990. Carbonatites complexes from Brazil. Journal of South American Earth Sciences3, 51–63.
    [Google Scholar]
  14. GuimarãesH.N. and WeissR.A.2001. The Complexity of the Niobium Deposits in the Alkaline‐UltramaficIintrusions Catalão I and II—Brazil. Mineração Catalão.
    [Google Scholar]
  15. HasuiY. and CordaniU.G.1968. Idades Potássico‐Argônio de rochas eruptivas mesozoicas do oeste mineiro e sul de Goiás. In: 22nd Congresso Brasileiro de Geologia, Belo Horizonte, Brazil, Proceedings, pp. 139–143.
    [Google Scholar]
  16. HsuS.K., SibuetI.C. and ShyuC.T.1996. High‐resolution detection of geologic boundaries from potential‐field anomalies: An enhanced analytic signal technique. Geophysics61, 373–386.
    [Google Scholar]
  17. HsuS., CoppensD. and ShyuC.1998. Depth to magnetic source using generalized analytic signal. Geophysics63, 1947–1957.
    [Google Scholar]
  18. IAEA 1991. Airbone gamma ray spectrometer surveying. In: IAEA Technical Reports Series323. IAEA.
    [Google Scholar]
  19. IAEA 2003. Guidelines for Radioelement Mapping Using Gamma Ray Spectrometry Data. IAEA.
    [Google Scholar]
  20. JamesD.E., AssumpçãoM., SnokeJ.A., RibottaL. and KuehnelR.1993. Seismic studies of continental lithosphere beneath SE Brazil. Academia Brasileira de Ciências65, 227–250.
    [Google Scholar]
  21. KaplanI.1955. Nuclear Physics. Addison‐Wesley Publishing Company.
    [Google Scholar]
  22. LaFehrT.R.1991. An exact solution for the gravity curvature (Bullard B) correction. Geophysics56, 1179–1184.
    [Google Scholar]
  23. LiY. and OldenburgD.W.1996. 3D inversion of magnetic data. Geophysics61(2), 394–408.
    [Google Scholar]
  24. LiY. and OldenburgD.W.1998. 3D inversion of gravity data. Geophysics63, 109–119.
    [Google Scholar]
  25. LiY. and OldenburgD.W.2003. Fast inversion of large‐scale magnetic data using wavelet transforms and a logarithmic barrier method. Geophysical Journal International152(2), 251–265.
    [Google Scholar]
  26. LongK.R., Van GosenB.S., FoleyN.K. and CordierD.2010. The principal rare earth elements deposits of the United States—A summary of domestic deposits and a global perspective. U.S. Geological Survey Scientific Investigations Report2010–5220.
  27. LouroV.H.A. and MantovaniM.S.M.2012. 3D inversion and modeling of magnetic and gravimetric data characterizing the geophysical anomaly source in Pratinha I in the southeast of Brazil. Journal of Applied Geophysics80, 110–120.
    [Google Scholar]
  28. LouroV.H.A., MantovaniM.S.M. and RibeiroV.B.2012. Indirect detection of remanent magnetization: a procedure for the composition of initial models for inversion. AGUFall meeting 2012, San Francisco, USA.
  29. LowrieW.2007. Fundamentals of Geophysics. Cambridge University Press.
    [Google Scholar]
  30. MacLeodI.N., JonesK. and DaiT.F.1993. 3D analytic signal in the interpretation of total magnetic field data at low magnetic latitudes. Exploration Geophysics24, 679–688.
    [Google Scholar]
  31. MantovaniM.S.M., ShukowskyW., Brito NevesB.B. and RugenskiA.2008. Gravimetric study of a potential mineral deposit in the Itapororoca region, Brazil. Geophysical Prospecting56, 751–760.
    [Google Scholar]
  32. MintyB.R.S.1988. A Review of Airborne Gamma‐Ray Spectrometric Data‐Processing Techniques. Australian Government Publishing Service.
  33. MintyB.R.S.1991. Simple micro‐levelling for aeromagnetic data. Exploration Geophysics22, 591–592.
    [Google Scholar]
  34. MorelliC.1968. Gravimetria. Editora Udine Italia.
    [Google Scholar]
  35. NabighianM.N.1972. The analytic signal of two‐dimensional magnetic bodies with polygonal cross‐section: Its properties and use for automated anomaly interpretation. Geophysics37, 507–517.
    [Google Scholar]
  36. OliveiraS.M.B. and ImbernonR.A.L.1998. Weathering and REE concentration in the Catalão I carbonatite complex, Central Brazil. Journal South American Earth Science11(4), 379–388.
    [Google Scholar]
  37. PereiraW.R. and MantovaniM.S.M.2012. Inversão de Dados Geofísicos do Complexo Alcalino‐Carbonatítico do Barreiro, Araxá – MG, com Ênfase em Métodos Potenciais. Geologia USP ‐ Série Científica12(2), 15–30.
    [Google Scholar]
  38. PiñaW.H.S. and SousaM.A.2001. O estado da base de dados gravimétricos do Observatório Nacional (BDG‐ON) situação em junho, 2001. Revista Brasileira de Geofísica19(3), 325–328.
    [Google Scholar]
  39. RibeiroC.C.2008. Geologia, geometalurgia, controles e gênese dos depósitos de fósforo, terras raras e titânio do complexo carbonatítico Catalão I, GO. Ph.D. Thesis, Universidade de Brasília.
    [Google Scholar]
  40. RibeiroC.C., BrodJ.A., Junqueira‐BrodT.C., GasparJ.C. and PetrinovicI.A.2005. Mineralogical and field aspects of magma‐fragmentation deposits in a carbonate‐phosphate magma chamber: evidence from the Catalão I Complex, Brazil. Journal of South American Earth Sciences18, 355–369.
    [Google Scholar]
  41. RibeiroV.B. and MantovaniM.S.M.2011. Campo Gravimétrico do Complexo Alcalino de Tapira/MG: Comparação entre Técnicas de Interpolação e de Separação Regional‐Residual. Revista Brasileira de Geofísica29, 463–485.
    [Google Scholar]
  42. RibeiroV.B. and MantovaniM.S.M.2012. Contribuição geofísica ao estudo do Batólito Granítico Santa Helena, sudoeste do Cráton Amazônico. Geologia USP‐ Série Científica12, 65–82.
    [Google Scholar]
  43. RibeiroV.B., MantovaniM.S.M. and LouroV.H.A.2014. Aerogamaespectrometria e suas aplicações no mapeamento geológico. Terræ Didatica10(1), 29–51.
    [Google Scholar]
  44. RugenskiA., MantovaniM.S.M., DiogoL.A. and ShukowskyW.2005. Resultados Geofísicos Integrados de um Corpo com Geometria 3D sem Manifestação Superficial. Geologia USP ‐ Série Científica5, 41–56.
    [Google Scholar]
  45. SeerH.J., BrodJ.A., FuckR.A., PimentelM.M., BoaventuraG.R. and DardenneM.A.2001. Grupo Araxá em sua área tipo: um fragmento de crosta oceânica neoproterozóica na faixa de dobramentos Brasília. Revista Brasileira de Geociências31(3), 386–396.
    [Google Scholar]
  46. SlavecG.B., MantovaniM.S.M. and ShukowskyW.2004. Estudo geofísico do maciço alcalino de poços de caldas. Revista Brasileira de Geociências34, 275–280.
    [Google Scholar]
  47. SonokiL.K. and GardaG.M.1988. Idades K‐Ar de rochas alcalinas do Brasil meridional e Paraguai oriental: compilação e adaptação às novas constantes de decaimento. Boletim IG‐USP19, 63–85.
    [Google Scholar]
  48. TelfordW.M., GeldartL.P., SheriffR.E. and KeysD.A.1990. Applied Geophysics. Cambridge University Press.
    [Google Scholar]
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  • Article Type: Research Article
Keyword(s): Gravity; Inversion; Magnetics

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