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Phenomenes de diagenese dans les sediments argileux

Published online by Cambridge University Press:  14 March 2018

Georges Kulbicki
Georges Kulbicki*
Affiliation:
Laboratoire de Minéralogie, Université de Toulouse
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Abstract

Microscopic observation is valuable for elucidating diagenetic phenomena in clays subsequent to deposition. Examples:—

  1. (1) Pressure can enlarge the regions of parallel orientation in kaolinite (Fig. 1), even giving zoned regions (Figs. 2, 3).

  2. (2) Solution and re-precipitation may give vermicular kaolinite (Figs. 4,5), “fluidic” halloysite (Fig. 6), or vermicular dickite on nuclei of hydrargillite (Fig. 7).

  3. (3) Montmorillonite may form from halloysite by action of basic siliceous waters (Fig. 8); or (together with halloysite) from kaolinite (Fig. 9).

  4. (4) Illite may recrystallise, giving large hexagonal forms (Fig. 10).

Type
Research Article
Information
Clay Minerals Bulletin , Volume 2 , Issue 12 , December 1954 , pp. 183 - 188
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1954

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References

Références

Kulbicki, G., 1953. (a) 78e Congrès des Soc. savantes, Toulouse, pp. 149-153; (b) C.R., 237, 194–196; (e) Thèse Sciences, Toulouse, dec, 1953.Google Scholar
de Lapparent, J., 1930. Les bauxites de la France méridionale. Mémoire Carte géol. Fr., Paris.Google Scholar