Skip to main content
SpringerLink
Log in

Electron probe microanalyses of muscovites from low grade metamorphic rocks of Tennant Creek area, Central Australia

  • Published:
Proceedings / Indian Academy of Sciences

Abstract

Electron probe microanalyses of 38 muscovites from Warramunga rocks, “porphyroidal” rocks and from magnetite rocks of lode structures of Tennant Creek field were carried out. Recrystallisation of muscovite, progressive in Warramunga rocks and retrogressive in “porphyroidal” rocks was contemporaneous and took place under lower green schist facies conditions of metamorphism during regional deformation. Muscovite in the magnetite lode structures and the country rock had formed ahead of the sulphide mineralisation on the Warramunga rocks subsequent to their regional metamorphism and was due to metasomatic alteration on the wall rocks.

The analysed muscovites conform to phengite mica but some of them have Si in excess of the stipulated limit of 3·5 units per half unit cell. The analysed phengites show a shift in the layer charge from tetrahedral to octahedral layer conforming to trisilicictetrasilicic series. The (Si +R 2+) and (AlVI + AlIV) show positive correlation. The author advocates that the term phengite be retained to describe all the intermediate members of the potassium dioctahedral micas including those having Si in excess on the stipulated limit.

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. Lambert, R. St.,J. Trans. R. Soc. Edinburgh 63 553 (1959).

    CAS  Google Scholar 

  2. Zen, E-an,Am. Mineral. 45 129 (1960).

    CAS  Google Scholar 

  3. Ernst, W. G.,Am. Mineral. 48 1357 (1963).

    CAS  Google Scholar 

  4. Ernst, W. G.,Geochem. et. Cosmochim. Acta 28 1631 (1964).

    Article  CAS  Google Scholar 

  5. McNamara, M. J.,Geol. Fore. i Stockholm Forh,87 347 (1965).

    CAS  Google Scholar 

  6. Brown, E. H.,Contrib. Mineral. Petrol. 14 259 (1967).

    Article  CAS  Google Scholar 

  7. Owen, H. B., Report on the Tennant Greek gold-field,Geol. Br. Dept. Int. Aust. (unpub.) (1942).

  8. Noakes, L. C.,Fifth Empire Mining and Metallurgical Congress, Australia and New Zealand ed. A. B. Edwards1 284 (1953).

    Google Scholar 

  9. Ivanac, J. F.Bureau of Mineral Resources Geology and Geophys. Bull. 22 (1, 2) (1954).

  10. Crohn, P. W., and Oldershaw, W.Bureau of Mineral Resources, Geology and Geophys. Records 1964/79 82 (1964).

  11. Dunnentt, D. and Harding, R. R.,N.T. Bureau of Mineral Resources, Geology and Geophys. Records 1965/16893 (1965).

  12. Hurley, P. M., Fisher, N. H., Pinson, W. H. and Fairbairn, H. W.,Geol. Soc. Am. Bull. 72 653 (1961).

    Article  CAS  Google Scholar 

  13. Elliston, J. N.,Austas. Inst. Min. Metall. Proc. 218 9 (1966).

    Google Scholar 

  14. Duncan, D. Mc.,Selected perphyroidal and granitic rocks at Tennant Creek, Northern Territory unpublished Ph.D. thesis submitted to the University of Tasmania (1970).

  15. Whittle, A. W. G.,The paragenesis and origin of the Tennant Creek mineral deposits, unpublished Ph.D. thesis, University of Adelaide (1966).

  16. McNeil, R. D.,Econ. Geol. 61 221 (1968).

    Article  Google Scholar 

  17. Edwards, A. B.,C.S.I.R.O. Mineragraphic Reports, Melbourne (1955–58).

  18. Smith, J. V.,J. Geol. 73 830 (1965).

    Article  CAS  Google Scholar 

  19. Long, J. V. P.,Physical Methods in Determinative Mineralogy, ed. J. Zussman (Academic Press, London) (1967).

    Google Scholar 

  20. Heinrich, K. F. J.,The Electron Probe, Eds. T. D. McKinley, K. F. J. Heinrich and D. B. Wittry, John Wiley, New York 296 (1966).

    Google Scholar 

  21. Colby, J. B.,The Electron Probe, eds. T. D. Mckinley, K. F. J. Heinrich and D. B. Wittry (John Wiley, New York)95 (1966).

    Google Scholar 

  22. Foster, M. D.,Am. Mineral. 45 383 (1960).

    CAS  Google Scholar 

  23. Schaller, W. T.,Mineral Mag. 29 406 (1950).

    Article  CAS  Google Scholar 

  24. Foster, M. D.,U.S. Geol. Surr. Bull. 1036 D57 (1956).

  25. Mather, J. D.,J. Petrol. 11 254 (1970).

    Google Scholar 

  26. Zen, E-an, and Albee, A. L.,Am. Mineral. 49 904 (1964).

    CAS  Google Scholar 

  27. Kurata, H. and Banno, S.,J. Petrol. 15 (2) 361 (1974).

    CAS  Google Scholar 

  28. Velde, B.,Contrib. Mineral. Petrol. 14 250 (1967).

    Article  CAS  Google Scholar 

  29. Winchell, A. N.,Am. Mineral. 12 267 (1927).

    CAS  Google Scholar 

  30. Winchell, A. N.,Am. Mineral.,34 220 (1949).

    CAS  Google Scholar 

  31. Kanehira, K. and Banno, B.,J. Geol. Soc. Tokyo 66 554 (1960).

    Google Scholar 

  32. Velde, B.,Am. J. Sci. 263 886 (1965).

    CAS  Google Scholar 

  33. Velde, B.,Contrib. Mineral. Petrol. 17 82 (1968).

    Article  CAS  Google Scholar 

  34. Brown, E. H.,Contrib. Mineral. Petrol. 17 78 (1968).

    Article  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Geology, Andhra University, 530003, Waltair

    T. Ramamohana Rao

Authors
  1. T. Ramamohana Rao
    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

Rao, T.R. Electron probe microanalyses of muscovites from low grade metamorphic rocks of Tennant Creek area, Central Australia. Proc. Indian Acad. Sci. 83, 150–159 (1976). https://doi.org/10.1007/BF03045704

Download citation

  • Received:

  • Revised:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF03045704

Keywords

Search

Navigation