Skip to main content
×
×
Home

Glauconite and celadonite: two separate mineral species

  • H. A. Buckley (a1), J. C. Bevan (a1), K. M. Brown (a1), L. R. Johnson (a1) and V. C. Farmer (a2)...
Summary

Analyses of glauconites and celadonites from continental sedimentary rocks and sea-floor basalts using X-ray diffraction, electron probe microanalysis, infra-red spectroscopy, and X-ray fluorescence spectroscopy are reported. The minerals are shown to be distinct species; each an isomorphous replacement series, glauconite having an average half unit cell of K0·85(Fe3+, Al3+)1·34 (Mg2+, Fe2+)0·66(Si3·76Al0·24)O10(OH)2 whereas celadonite approaches the ideal half unit cell of K(Fe3+, Al3+)(Mg2+, Fe2+)Si4O10(OH)2. Considerable Fe3+Alvi interchangeability occurs in the octahedral layer in both minerals and considerable substitution of aluminium in the tetrahedral layer of glauconites results in the more disordered 1Md type of structure compared with the more highly ordered 1M structure of celadonites. Some mixed layer glauconite-smectites and celadonites were also examined and could be distinguished from true glauconites and celadonites by chemical analysis, XRD, and IR techniques. It is proposed that the terms ‘glauconite’ and ‘celadonite’ should be used only for those minerals containing less than 5% interlayering.

Copyright
References
Hide All
Bentnor, (Y. K.) and Kastner, (M.), 1965. Jour. Geol. Petr. 35, 155-66.
Carroll, (D.), 1970. Geol. Soc. Am. Spec. Pap. 126, 1-80.
Easton, (A. J.), 1972. Chemical analysis of silicate rocks, 1-258, Elsevier, London.
Foster, (M. D.), 1969. U.S. Geol. Surv. Prof. Pap. 614-F, 117.
Hendricks, (S. B.) and Ross, (C. S.), 1941. Am. Mineral. 26, 683-708.
Kastner, (M.), 1976. In Schlanger, (S. O.) and Johnson, (E. D.), Initial Reports Deep-Sea Drilling Project, 35, 518-19.
Kempe, (D. R. C.), 1974. In Davis, (T. A.) and Luyendyk, (B. P.), Ibid. 26, 465503.
Kohyama, (N.), Shimode, (S.), and Sudo, (T.), 1971. Mineral. J. Japan, 6, 299312.
Mason, (B.), 1966. N.Z.J. Geophys. 9, 474-80.
Mason, (B.) and Allen, (R. O.), 1973. N.Z.J. Geophys. 16, 935-47.
Mason, (P.), Frost, (M. T.), and Reed, (S. J. B.), 1969. National Physical Lab. I.M.S. Report I.
McRae, (S. G.), 1972. Earth-Sci. Rev. 8, 397-440.
Odin, (G. S.), 1975. Ph.D. Thesis, Univ. P. et M. Curie de Paris.
Odom, (I. E.), 1976. Clays Clay Miner, 24, 232-8.
Padgham, (R. C.), 1970. Unpublished Ph.D. Thesis, Univ. of London.
Riley, (J. P.) and Williams, (M. P.), 1959. Mikrochim. Acta, 4, 516-24.
Russell, (J. D.), 1974. In Farmer, (V. C.), The infra-red spectra of minerals, Min. Soc. Lond, 11-25.
Summerhayes, (C. P.), 1970. Unpublished Ph.D. Thesis, Univ. of London.
Sweatman, (T. R.) and Long, (J. V. P.), 1969. J. Petrol. 10, 332-76.
Thompson, (G. R.) and Hower, (J.), 1975. Clays Clay Miner. 23, 289-300.
Weaver, (C. E.) and Pollard, (L. D.), 1973. The chemistry of clay minerals, Elsevier, 2345.
Wise, (S. E.) and Eugster, (H. P.), 1964. Am. Mineral. 49, 1031-83.
Zumpe, (H. H.), 1971. Mineral. Mag. 38, 215-24.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Mineralogical Magazine
  • ISSN: 0026-461X
  • EISSN: 1471-8022
  • URL: /core/journals/mineralogical-magazine
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed