Hostname: page-component-7bb8b95d7b-dvmhs Total loading time: 0 Render date: 2024-10-04T18:45:46.092Z Has data issue: false hasContentIssue false
  • English
  • Français

Regularly Interstratified Montmorillonite-Chlorite in Basalt

Published online by Cambridge University Press:  01 January 2024

J. W. Earley  and
I. H. Milne
J. W. Earley
Affiliation:
Gulf Research & Development Company, Pittsburgh, Pennsylvania, USA
I. H. Milne
Affiliation:
Gulf Research & Development Company, Pittsburgh, Pennsylvania, USA
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The dominant clay mineral in an amygdaloidal basalt from Mozambique is a mixed-layer variety having a highly regular alternation of montmorillonite-like and chlorite-like layers. The montmorillonite-chlorite occurs in the amygdules as green rosettes having a fine fibrous structure.

X-ray examination of this mineral shows a long spacing of about 29 A in air and a fairly well-developed sequence of basal spacings. The long spacing shows some variation which is dependent on the relative humidity of the air surrounding the sample. The montmorillonite-like layers expand with glycerol and contract with heat treatment similar to montmorillonite, while the chiorite-like layers show modified reflection intensities on heating similar to chlorite. The mineral shows a 31.7 A spacing when glycerol saturated and a 23.3 A spacing when fully dehydrated.

Type
Article
Information
Clays and Clay Minerals (National Conference on Clays and Clay Minerals) , Volume 4 , February 1955 , pp. 381 - 384
Copyright
Copyright © The Clay Minerals Society 1955

Footnotes

Publication authorized by Executive Vice-President, Gulf Research & Development Company.

References

Bradley, W. F., 1950, The alternating layer sequence of rectorite: Amer. Min., v. 35, p. 590–595.Google Scholar
Earley, J. W., Brindley, G. W., McVeagh, W. J., and Vanden Heuvel, R. C., 1956, A regularly interstratified montmorillonite-chlorite: Amer. Min. v. 41, p. 258–267.Google Scholar
Heystek, H., 1954, An occurrence of a regular mixed-layer clay mineral: Min. Mag., v. 30, p. 400–408.Google Scholar
Lippmann, F., 1954, Über einen Keuperton von Zaisersweiher bei Maulbronn: Heidel. Beit, z. Min. u. Petrol., v. 4, p. 130–134.Google Scholar
Sudo, T., Takahashi, H., and Matsui, H., 1954, On x-ray properties of the fireclay from the Kurata Mines, Yamaguchi Prefecture: Jap. J. Geol. and Geog., v. 24, p. 71–85; Nature, v. 173, p. 261.Google Scholar