Skip to main content
SpringerLink
Log in

Geochronology of sediments in the Cananeia-Iguape estuary and in southern continental shelf of Săo Paulo State, Brazil

  • Published:
Journal of Radioanalytical and Nuclear Chemistry Aims and scope Submit manuscript

Abstract

Instrumental analysis methods for 210Pb, 226Raand 137Cs by gamma-spectrometry in sediments, as well as the sedimentationrates in cores collected from Brazilian coastal region are presented. Samplinglocations have covered the Cananeia-Iguape estuary and the continental shelfof southern Sao Paulo State. Values for 210Pb ranged from 122.5to 14.3 Bq . kg —1 for estuarine sediments and from 195.5to 23.6 Bq . kg –1 at the continental shelf. For 226Ra thevalues obtained in sediments varied from 15.2 to 2.3 Bq . kg —1 in the estuary and from 30.1 to 16.1 Bq . kg —1 atthe continental shelf. Sedimentation rates are variable, ranging from 0.53to 0.98 cm . y —1 in estuary sediments and from 0.18 to 0.40cm . y —1 at the continental shelf.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. M. Koide,A. Soutar,E. D. Goldberg, Earth Planet Sci. Letters, 14 (1972) 442.

    Google Scholar 

  2. L. U. Joshi,T. L. Ku, J. Radioanal. Nucl. Chem., 52 (1979) 329.

    Google Scholar 

  3. M. Ravichandran,M. Baskaran,P. H. Santschi,T. S. Bianchi, Chem. Geol., 125 (1995) 291.

    Google Scholar 

  4. J. D. Eakins, IAEA-TECDOC-298, 1983, p. 31.

  5. G. Kirchener,H. Ehlers, J. Coastal Res., 14 (1998) 483.

    Google Scholar 

  6. Z. Zuo,D. Eisma,R. Gieles,J. Beks, Deep-Sea Res. II, 44 (1997) 597.

    Google Scholar 

  7. C. C. Fuller,A. V. Genn,M. Baskaran,R. Anima, Mar. Chem., 64 (1999) 7.

    Google Scholar 

  8. B. L. K. Somayajulu,R. Bhushan,A. Sarkar,G. S. Burr,A. J. T. Jull, Sci. Total Environ., 237/238 (1999) 429.

    Google Scholar 

  9. B. M. Castro Filho,L. B. Miranda,S. Y. Myao, Bolm. Inst. Oceanogr., 35 (1987) 135.

    Google Scholar 

  10. M. M. Mahiques, Associate Professorship Thesis, Oceanographic Institute of Sao Paulo University, 1998, p. 86.

  11. EGG&Ortec, Maestro II Software Model A64–BI Operator Manual, USA, 1992.

  12. I. I. L. Cunha,R. C. L. Figueira,R. T. Saito, J. Radioanal. Nucl. Chem., 239 (1999) 477.

    Google Scholar 

  13. International Atomic Energy Agency, Catalogue of Reference Materials. IAEA, Vienna, 2000.

    Google Scholar 

  14. G. R. Helz,G. H. Setlock,A. Y. Cantillo,W. S. Moore, Earth Planet Sci. Letters, 76 (1985/ 1986) 23.

    Google Scholar 

  15. P. McDonald,G. T. Cook,M. S. Baxter, Proc. Intern. Symp. on Radionuclides in the Study of Marine Process, Norwich, United Kingdom, Sept., 1991.

  16. M. Baskaran,S. Naidu, Geochim. Cosmochim. Acta, 59 (1995) 4435.

    Google Scholar 

  17. R. C. L. Figueira,L. R. N. Silva,A. M. G. Figueiredo,I. I. L. Cunha, Proc. Intern. Conf. on the Radiological Accident of Goiania-10 years later, Goiania, Brazil, Oct., 1997.

  18. I. Othman,T. Yassine,I. S. Bhat, Sci. Total Environ., 153 (1994) 57.

    Google Scholar 

  19. G.-H. Hong,S.-H. Lee,S.-H. Kim,C-S. Chung,M. Baskaran, Sci. Total Environ., 237/238 (1999) 225.

    Google Scholar 

  20. U. S. Kumar,S. V. Navada,S. M. Rao,R. P. Nachiappan,B. Kumar,T. Krishnamoorthy,S. K. Jha,V. K. Shukla, Appl. Radiation Isotopes, 51 (1999) 97.

    Google Scholar 

  21. C. A. Huh,H.-Y. Chen, Mar. Pollut. Bull., 38 (1999) 545.

    Google Scholar 

  22. C-A. Huh,C-C. Su, Mar. Geol., 160 (1999) 183.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. 1 IPEN/CNEN-SP, Brazil (TFR)

    I.I. L. Cunha

Authors
  1. I.I. L. Cunha
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Cunha, I.L. Geochronology of sediments in the Cananeia-Iguape estuary and in southern continental shelf of Săo Paulo State, Brazil. Journal of Radioanalytical and Nuclear Chemistry 250, 109–115 (2001). https://doi.org/10.1023/A:1013228616973

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1023/A:1013228616973

Keywords

Search

Navigation