Hostname: page-component-78c5997874-j824f Total loading time: 0 Render date: 2024-11-13T07:14:02.475Z Has data issue: false hasContentIssue false
  • English
  • Français

Expansion of Smectite by Laurylamine Hydrochloride: Ambiguities in Transmission Electron Microscope Observations

Published online by Cambridge University Press:  02 April 2024

Jung Hoo Lee  and
Donald R. Peacor
Jung Hoo Lee*
Affiliation:
Department of Geological Sciences, The University of Michigan, Ann Arbor, Michigan 48109
Donald R. Peacor
Affiliation:
Department of Geological Sciences, The University of Michigan, Ann Arbor, Michigan 48109
*
2Present address: Department of Geology, Jeonbuk National University, Jeonju, South Korea.
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.

Treatment of smectite with laurylamine hydrochloride was verified to cause expansion of d(001) which may be retained and observed in ion-milled samples by transmission electron microscopy. The spacings between layers as observed in lattice fringe images, however, are variable and may be as small as 10 Å. The method therefore produces ambiguities in differentiating between some smectites and illites, similar to those that have been found for untreated samples; e.g., on this basis, expanded layers may be inferred to be smectite, but layers with d-values approaching 10 Å may be either illite or smectite. Expansion also destroys the original rock texture, which, therefore, must be observed using only untreated samples.

Keywords

ExpansionIlliteLattice fringe imagesLaurylamine hydrochlorideSmectiteTransmission electron microscopy
Type
Research Article
Information
Clays and Clay Minerals , Volume 34 , Issue 1 , February 1986 , pp. 69 - 73
Copyright
Copyright © 1986, The Clay Minerals Society

Footnotes

1

Contribution No. 410, Mineralogical Laboratory, Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109.

References

Ahn, J. H., Lee, J. H. and Peacor, D. R., 1983 Mineralogical and textural transitions in phyllosilicates during burial diagenesis of Gulf Coast shales Geol. Soc. Amer. Ann. Meet. Abstr. with Prog. 15 512.Google Scholar
Ahn, J. H. and Peacor, D. R., 1984 The smectite to illite transformation in Gulf Coast argillaceous sediments based on microstructure by TEM/AEM Prog. with Abstracts, Ann. Meet. Clay Minerals Soc., Baton Rouge, Louisiana, 1984 22.Google Scholar
Freed, R. L. and Peacor, D. R., 1984 Complete dehydration of illite/smectite in Gulf Coast overpressured shales Amer. Assoc. Pet. Geol. Bull. Tech. Prog. Summ. and Abstr. 68 498.Google Scholar
Isaacs, A. M., Brown, P. E., Valley, J. W., Essene, E. J. and Peacor, D. R., 1981 An analytical electron microscopic study of a pyroxene-amphibole intergrowth Contrib. Min. Pet. 77 115–120.CrossRefGoogle Scholar
Klimentidis, R. E. and Mackinnon, D. R., 1984 High resolution electron microscopy of mixed-layer clays Prog. with Abstracts, Ann. Meet. Clay Minerals Soc, Baton Rouge, Louisiana, 1984 70.Google Scholar
Lee, J. H., Ahn, J. H. and Peacor, D. R., 1985 Textures in layered silicates: progressive changes through diagenesis and low temperature metamorphism Sed. Petrol. 33 228–236.Google Scholar
Lee, J. H. and Peacor, D. R., 1983 Intralayer transitions in phyllosilicates of the Martinsburg Shale Nature 303 608–609.CrossRefGoogle Scholar
Page, R. and Wenk, H. R., 1979 Phyllosilicate alteration of plagioclase studied by transmission electron microscopy Geology 7 393–397.2.0.CO;2>CrossRefGoogle Scholar
Peacor, D. R., Essene, E. J., Lee, J. H., Kuo, L.-C., Alexander, D. H. and Birchard, G. F., 1984 Analysis of factors affecting the stability of backfill materials Proc. U.S. Nuclear Regulatory Commission, NRC Nuclear Waste Geochemistry’ 83 234–293.Google Scholar
Yoshida, T., 1973 Elementary layers in the interstratified clay minerals as revealed by electron microscopy Clays & Clay Minerals 21 413–420.CrossRefGoogle Scholar