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The Pendennis peralkaline minette

Published online by Cambridge University Press:  05 July 2018

A. Hall
A. Hall*
Affiliation:
Department of Geology, King's College, Strand, London WC2R 2LS
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Abstract

The Pendennis minette has an exceptionally high K2O/Na2O ratio and is strongly peralkaline. Its constituent minerals, which are described in detail, are sanidine, biotite, two carbonates (dolomite and ferroan magnesite), two amphiboles (riebeckite and a new variety, potassium magnesio-arfvedsonite), and quartz. The major and trace dement composition of the minette indicates close affinities with the lamproitic lavas.

Type
Research Article
Information
Mineralogical Magazine , Volume 45 , Issue 337 , 1982 , pp. 257 - 266
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1982

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References

Bachinski, S. W., and Scott, R. B. (1979) Geochim. Cosmochim. Acta, 43, 93-100.CrossRefGoogle Scholar
Carmichael, I. S. E. (1967) Contrib. Mineral. Petrol. 15, 24-66.CrossRefGoogle Scholar
Cosgrove, M. E. (1972) Ibid. 36, 155-70.Google Scholar
Dawson, J. B., and Smith, J. V. (1977) Geochim. Cosmochim. Acta, 41, 309-23.CrossRefGoogle Scholar
Deer, W. A., Howie, R. A., and Zussman, J. (1963) Rock forming minerals. Vol. 3. Longmans, London.Google Scholar
Eggler, D. H., and Wendlandt, R. F. (1978) Carnegie Inst. Washington Yearb. 77, 751-6.Google Scholar
Hall, A. (1974) West Cornwall. Geologists’ Association Guide, no. 19.Google Scholar
Harte, B., and Gurney, J. J. (1975) Carnegie Inst. Washington Yearb. 74, 528-36.Google Scholar
Leake, B. E. (1978) Mineral. Mag. 42, 533-63.CrossRefGoogle Scholar
Lees, G. J. (1974) Proc. Ussher Soc. 3, 149-55.Google Scholar
Metais, D., and Chayes, F. (1963) Carnegie Inst. Washington Yearb. 62, 156-7.Google Scholar
Milodowski, A. E., and Morgan, D. J. (1980) Nature, 286, 248-9.CrossRefGoogle Scholar
Sahama, Th. G. (1974) In The alkaline rocks (Sorensen, H., ed.) John Wiley, London, 96-109.Google Scholar
Scott, B. H. (1979) In Kimberlites, diatremes and diamonds: their geology, petrology and geochemistry (F. R., Boyd and H. O. A., Meyer, eds.) Am. Geophys. Union, Washington. 190-205.Google Scholar
Velde, D. (1967) Bull. Soc. Ft. Mineral. Cristallogr. 90, 214-23.Google Scholar
Velde, D. (1971) Contrib. Mineral. Petrol. 30, 216-39.CrossRefGoogle Scholar
Velde, D. (1975) Am. Mineral. 60, 566-73.Google Scholar
Wedepohl, K. H., and Muramatsu, Y. (1979) In Kimberlites, diatremes and diamonds: their geology, petrology and geochemistry (Boyd, F. R. and Meyer, H. O. A., eds.) Am. Geophys. Union, Washington. 300-12.CrossRefGoogle Scholar