Skip to main content
SpringerLink
Log in

ESR studies of sepiolites

  • Published:
Applied Magnetic Resonance Aims and scope Submit manuscript

Abstract

The electron spin resonance (ESR) spectra for each beige and brown sepiolites from Polatli-Ankara, Turkey, a clay mineral of Mg8Si12O30(OH)4(OH2)4(H2O)8, at 77 K have their own single characteristic peak atg ≈ 1.99, which begins to anneal from 437 and 536°C, respectively. The sextet lines of Mn2+ were also observed in addition to two peaks (g = 4.4 and 5.0) associated with Fe3+. A high-quality sepiolite called “meerschaum” from Sepetci-Eskisehir, Turkey, has two characteristic peaks atg ≈ 1.99, which begins to anneal from 419°C, and atg ≈ 2.03. ESR intensities of the signal atg ≈ 1.99 for beige, brown sepiolites and meerschaum are enhanced by γ-ray irradiation to give equivalent dosesD E = 11.8 ± 3.4, 4.7 ± 2.3 and 4.6 ± 1.2 kGy, respectively. The ESR ages obtained by assessing the annual dose rate from the content of238U,232Th and40K determined by γ-ray spectroscopy are 1.8 ± 0.8, 0.7 ± 0.5 and 0.9 ± 0.2 Ma, respectively, falling into the Pliocene Epoch in geological time scale in agreement with the stratigraphy.

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. Ocal H., Gencoglu H., Irkec T.: Technological Properties of the Sedimentary Sepiolites, Eskisehir-Sivrihisar, VII Ulusal Kil Sempozyumu, Ankara 1995.

    Google Scholar 

  2. Ikeya M: Archaeometry20, 147–158 (1978)

    Article  Google Scholar 

  3. Ikeya M.: Magn. Reson. Rev.13, 91–134 (1988)

    Google Scholar 

  4. Ikeya M.: New Applications of Electron Spin Resonance — Dating, Dosimetry and Microscopy. Singapore: World Scientific 1993.

    Google Scholar 

  5. Grun R.: Quat. Int.1, 65–109 (1989)

    Article  Google Scholar 

  6. Grun R.: Nucl. Tracks Radiat. Meas.18, 143–153 (1991)

    Article  Google Scholar 

  7. Friedlander H.Z., Saldick J., Frink C.R.: Nature199, 61–62 (1963)

    Article  ADS  Google Scholar 

  8. Wauchophe R.D., Haque R.: Nature233, 141–142 (1971)

    ADS  Google Scholar 

  9. Meads R.E., Malden P.J.: Clay Minerals10, 313–345 (1975)

    Article  Google Scholar 

  10. Pinnavaia T.J. in: Advanced Chemical Methods for Soil and Clay Minerals Research (Stucks J.W., Banwart W.L., eds.), pp. 391–422. Dordrecht: Reidel Publishing 1980.

    Google Scholar 

  11. Fripiat J.J. in: Developments in Sedimentology — Advanced Techniques for Clay Mineral Analysis (Pinnavaia T.J., ed.), pp. 139–161. Amsterdam: Elsevier 1982.

    Google Scholar 

  12. McBride M.B. in: Instrumental Surface Analysis of Geologic Materials (Perry D.L., ed.). New York: VCH 1990.

    Google Scholar 

  13. Clozel B., Calas G., Muller J.P., Dran J.C., Herve A.: Chem. Geol.84, 259–260 (1990)

    Article  Google Scholar 

  14. Clozel B., Komura K., Makashima S., Nagao T., Masaki N., Hayashi H.: Rept. Res. Inst. Natural Resources57, 25 (1992)

    Google Scholar 

  15. Gencoglu H., Irkec T.: Bull. Geol. Congress Turkey9, 281–296 (1994)

    Google Scholar 

  16. Akinci O.: M.T.A. Dergisi, Bull. Min. Res. Exp. Inst. Turkey67, 82–97 (1967)

    Google Scholar 

  17. Otsuka R., Mariko T., Sakamoto T. in: Memories of the School of Science and Engineering, Waseda Univ., Japan37, 43–52 (1973)

    Google Scholar 

  18. Ogoh K., Ikeda S., Ikeya M.: Adv. ESR Appl.9, 22 (1993)

    Google Scholar 

  19. Lyons R.G., Brennan B.J.: Nucl. Tracks Radiat. Meas.18, 223–227 (1991)

    Article  Google Scholar 

  20. Jones J.P.E., Angel B.R., Hall P.L.: Clay Minerals10, 257–270 (1974)

    Article  Google Scholar 

  21. Ece O., Coban F.: Clays Clay Minerals42(1), 81–92 (1994)

    Article  Google Scholar 

  22. Yokoyama Y., Falgueres C.: Nucl. Tracks10(4/6), 921–928 (1985)

    Google Scholar 

  23. Imai N., Shimokawa K.: Quat. Sci. Rev.7, 523–527 (1988)

    Article  ADS  Google Scholar 

  24. Toyoda S., Ikeya M.: Geochem. J.25, 437–445 (1991)

    Google Scholar 

  25. Toyoda S., Ikeya M.: Nucl. Tracks Radiat. Meas.18(1/2), 179–184 (1991)

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Physics Engineering, Hacettepe University, Ankara, Turkey

    U. Ulusoy

  2. Department of Earth and Space Science, Graduate School of Science, Osaka University, Osaka, Japan

    M. Ikeya

Authors
  1. U. Ulusoy
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. M. Ikeya
    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

Ulusoy, U., Ikeya, M. ESR studies of sepiolites. Appl. Magn. Reson. 18, 537–548 (2000). https://doi.org/10.1007/BF03162300

Download citation

  • Received:

  • Revised:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF03162300

Keywords

Search

Navigation