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Some chemical data on British Carboniferous sediments and their relationship to the clay mineralogy of these rocks

Published online by Cambridge University Press:  14 March 2018

G. D. Nicholls  and
D. H. Loring
G. D. Nicholls
Affiliation:
Department of Geology, University of Manchester
D. H. Loring
Affiliation:
Department of Geology, University of Manchester
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Abstract

Analyses of shales, mudstones and associated strata from the British Coal Measures reflect the general similarity of the clay mineralogy of the rocks studied. Variations in the Na+:K+ ratio appear to be due to variations in the Na+:K+ ratio in illite. It is suggested that degraded illite supplied to the site of sedimentation had a higher Na+:K+ ratio than the illite now present in the shales and that post-depositional changes have caused a fall in this ratio. Under conditions of rapid sedimentation such changes tend to be inhibited by rapid burial. In the seat earths, produced by very slow sedimentation, post-depositional changes continued to an advanced stage and resulted in low Na+:K+ ratio in the final sedimentary rock.

Type
Research Article
Information
Clay Minerals Bulletin , Volume 4 , Issue 24 , December 1960 , pp. 196 - 207
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1960

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References

Degens, E. T., Williams, E. G., and Keith, M. L., 1957. Bull. Amer. Ass, Petrol. Geol., 41, 2427.Google Scholar
Ernst, W., Krejci-Graf, K., and Werner, H., 1958. Geochim. et cosmoch. Acta, 14, 211.Google Scholar
Grim, R. E., 1953. Clay Mineralogy. McGraw-Hill, New York.Google Scholar
Grim, R. E., and Bradley, W. F., 1955. Geol. Rdsch., 43, 469.Google Scholar
Hirst, D. M., 1958. Ph.D. Thesis, University of Manchester.Google Scholar
Johns, W. D., and Grim, R. E., 1958. J. Sediment. Petrol., 28, 186.Google Scholar
Landergren, S., 1945. Ark. Kemi Min. Geol., 19a, No. 26.Google Scholar
Milne, I. H., and Earley, J. W., 1958. Bull. Amer. Ass. Petrol. Geol., 42, 328.Google Scholar
Nicholls, G. D., 1960. J. Sediment. Petrol. (In press).Google Scholar
Powers, M. C., 1959. Clays and Clay Minerals (A. Swineford, editor). Per-gamon Press, London, p. 309.Google Scholar
Weaver, C. E., 1958. Bull. Amer. Ass. Petrol. Geol., 42, 254.Google Scholar
Weaver, C. E., 1959. Clays and Clay Minerals (A. Swineford, editor). Per-gamon Press, London, p. 154.Google Scholar