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Transmission and Analytical Electron Microscopy of the Smectite-To-Illite Transition

Published online by Cambridge University Press:  02 April 2024

Juno Ho Ahn  and
Donald R. Peacor
Juno Ho Ahn
Affiliation:
Department of Geological Sciences, The University of Michigan, 1006 C. C. Little Building, Ann Arbor, Michigan 48109
Donald R. Peacor
Affiliation:
Department of Geological Sciences, The University of Michigan, 1006 C. C. Little Building, Ann Arbor, Michigan 48109
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Abstract

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The smectite to illite reaction was studied by transmission and analytical electron microscopy (TEM/AEM) in argillaceous sediments from depths of 1750, 2450, and 5500 m in a Gulf Coast well. Smectite was texturally characterized as having wavy 10- to 13-Å layers with a high density of edge-dislocations, and illite, as having relatively defect-free straight 10-Å layers. The structures of smectite and illite were not continuous parallel to (001) at smectite-illite interfaces. AEM data showed that the smectite and illite were chemically distinct although smectite had a more variable composition. Illite formation appeared to have initiated with the growth of small packets of illite layers within subparallel layers of smectite matrix. With increasing depth, ubiquitous thin packets of illite layers increased in size until they coalesced.

A model for the transition requires that the structure of smectite was largely disrupted at the illite-smectite interface and reconstituted as illite, with concomitant changes in the chemistry of octahedral and tetrahedral sites. At least partial Na-K exchange of smectite preceded illite formation. Transport of reactants (K, Al) and products (Na, Si, Fe, Mg, H20) through the surrounding smectite matrix may have taken place along dislocations.

The smectite-to-illite conversion process for the studied samples does not necessarily appear to have required mixed-layer illite/smectite as an intermediate phase, and TEM and AEM data from unexpanded samples were found to be incompatible with the existence of mixed-layer illite/smectite in specimens whose XRD patterns indicated its presence.

Keywords

Analytical electron microscopyBurial diagenesisIlliteInterstratificationSmectiteTransmission electron microscopy
Type
Research Article
Information
Clays and Clay Minerals , Volume 34 , Issue 2 , April 1986 , pp. 165 - 179
Copyright
Copyright © 1986, The Clay Minerals Society

Footnotes

1

Contribution No. 412, the Mineralogical Laboratory, Department of Geological Sciences, The University of Michigan, Ann Arbor, Michigan 48109.

References

Ahn, J. H. and Peacor, D. R., 1985 Transmission electron microscopic study of diagenetic chlorite in Gulf Coast argillaceous sediments Clays & Clay Minerals 33 228–236.CrossRefGoogle Scholar
Ahn, J. H. and Peacor, D. R., 1985 The smectite to ka-olinite transformation in Gulf Coast argillaceous sediments: a TEM and AEM study Program and Abstracts International Clay Conference, Denver, Colorado, 1985 4.Google Scholar
Ahn, J. H., Peacor, D. R. and Essene, E. J., 1985 Coexisting paragonite-phengite in blueschist eclogite: a TEM study Amer, Mineral. 70 1193–1204.Google Scholar
Aronson, J. L. and Hower, J., 1976 The mechanism of burial metamorphism of argillaceous sediments: 2. Radiogenic argon evidence Geol. Soc. Amer. Bull. 87 738–744.2.0.CO;2>CrossRefGoogle Scholar
Boles, J. R. and Franks, S. G., 1979 Clay diagenesis in Wilcox sandstones of southeast Texas: implications of smectite diagenesis on sandstone cementation J. Sed. Petrol. 49 55–70.Google Scholar
Burst, J. F., 1969 Diagenesis of Gulf Coast clayey sediments and its possible relation to petroleum migration Amer. Assoc. Petrol. Geol. Bull. 53 73–93.Google Scholar
Cliff, G. and Lorimer, G. W., 1975 The quantitative analysis of thin specimens J. Microsc. 103 203–207.CrossRefGoogle Scholar
Cooper, J. E. and Abedin, K. Z., 1981 The relationship between fixed ammonium-nitrogen and potassium in clays from a deep well on the Texas Gulf Coast Texas J. Sci. 33 103–111.Google Scholar
Eberl, D. D., 1971 Experimental diagenetic reactions involving clay minerals Ph.D. thesis Cleveland, Ohio Case Western Reserve Univ..Google Scholar
Eberl, D., 1978 The reaction of montmorillonite to mixed-layer clay: the effect of interlayer alkali and alkaline earth cations Geochim. Cosmochim. Acta 42 1–7.CrossRefGoogle Scholar
Eberl, D., 1978 Reaction series for dioctahedral smectites Clays & Clay Minerals 26 327–340.CrossRefGoogle Scholar
Eberl, D. D., 1980 Alkali cation selectivity and fixation by clay minerals Clays & Clay Minerals 28 161–172.CrossRefGoogle Scholar
Eberl, D. D., 1984 Clay mineral formation and transportation in rocks and soils Phil. Trans. Roy. Soc. Lond. A311 241–259.Google Scholar
Eberl, D. and Hower, J., 1976 The kinetics of illite formation Bull. Geol. Soc. Amer. 87 1326–1330.2.0.CO;2>CrossRefGoogle Scholar
Eberl, D. and Hower, J., 1977 The hydrothermal transformation of sodium and potassium smectite into mixed-layer clay Clays & Clay Minerals 25 215–227.CrossRefGoogle Scholar
Eggleton, R. A., 1984 Formation of iddingsite rims on olivine: a transmission electron microscope study Clays & Clay Minerals 32 1–11.CrossRefGoogle Scholar
Eslinger, E., Highsmith, P., Albers, D. and deMayo, B., 1979 Role of iron reduction in the conversion of smectite to illite in bentonites from the Disturbed Belt, Montana Clays & Clay Minerals 27 327–338.CrossRefGoogle Scholar
Eslinger, E. and Sellars, B., 1981 Evidence for the formation of illite from smectite during burial metamorphism in the Belt Supergroup, Clark Fork, Idaho J. Sed. Petrol. 51 202–216.Google Scholar
Gast, R. G., 1969 Standard free energies of exchanges of alkali metal cations on Wyoming bentonite Soil Sci. Soc. Amer. Proc. 33 37–41.CrossRefGoogle Scholar
Heling, D., 1978 Diagenesis of illite in argillaceous sediments of the Rhinegraben Clay Miner. 13 211–220.CrossRefGoogle Scholar
Hoffman, J. and Hower, J., 1979 Clay mineral assemblages as low grade metamorphic geothermometers: application to the thrust faulted Disturbed Belt of Montana, U.S.A. Soc. Econ. Paleontol. Mineral. Spec. Pubi. 26 55–79.Google Scholar
Hower, J. and Longstaffe, F. J., 1981 Shale diagenesis Clays and the Resource Geologist Canada Short Course Handbook 7, Mineral. Assoc. 60–80.Google Scholar
Hower, J., Eslinger, E. V., Hower, M. E. and Perry, E. A., 1976 Mechanism of burial metamorphism of argillaceous sediments: 1. Mineralogical and chemical evidence Geol. Soc. Amer. Bull. 87 725–737.2.0.CO;2>CrossRefGoogle Scholar
Iijima, S. and Buseck, P. R., 1978 Experimental study of disordered mica structure by high-resolution electron microscopy Acta Crystallogr A34 709–719.CrossRefGoogle Scholar
Inoue, A., 1983 Potassium fixation by clay minerals during hydrothermal treatment Clays & Clay Minerals 31 81–91.CrossRefGoogle Scholar
Inoue, A. and Minato, H., 1979 Ca-K exchange reaction and interstratification in montmorillinite Clays & Clay Minerals 27 393–401.CrossRefGoogle Scholar
Inoue, A. and Utada, M., 1983 Further investigation of a conversion series of dioctahedral mica/smectite in the Shin-zan hydrothermal alteration area, northeast Japan Clays & Clay Minerals 31 401–412.CrossRefGoogle Scholar
Lahann, R. W. and Roberson, H. E., 1980 Dissolution of silica from montmorillonite: effect of solution chemistry Geochim. Cosmochim. Acta 44 1937–1943.CrossRefGoogle Scholar
Lee, J. H., Ahn, J. H. and Peacor, D. R., 1985 Textures in layered silicates: progressive changes through diagenesis and low-temperature metamorphism J. Sed. Petrol. 55 532–540.Google Scholar
Lee, J. H., Peacor, D. R., Lewis, D. D. and Wintsch, R. P., 1984 Chlorite-illite/muscovite interlayered and inter-stratified crystals: a TEM/STEM study Contrib. Mineral. Petrol. 88 372–385.CrossRefGoogle Scholar
Lipmann, F., van Olphen, H. and Veniale, F., 1982 The thermodynamic status of clay minerals Proc. Int. Clay Conf., Bologna, Pavia, 1981 Amsterdam Elsevier 475–485.Google Scholar
Lorimer, G. W., Cliff, G. and Wenk, H. R., 1976 Analytical electron microscopy of minerals Electron Microscopy in Mineralogy Berlin Springer 506–519.CrossRefGoogle Scholar
Nadeau, P. H., Tait, J. M., McHardy, W. J. and Wilson, M. J., 1984 Interstratified XRD characteristics of physical mixtures of elementary clay particles Clay Miner. 19 67–76.CrossRefGoogle Scholar
Nadeau, P. H., Wilson, M. J., McHardy, W. J. and Tait, J. M., 1984 Interparticle diffraction: a new concept for interstratified clays Clay Miner. 19 757–769.CrossRefGoogle Scholar
Page, R. H. and Wenk, H. R., 1979 Phyllosilicate alteration of plagioclase studied by transmission electron microscopy Geology 7 393–397.2.0.CO;2>CrossRefGoogle Scholar
Perry, E. and Hower, J., 1970 Burial diagenesis in Gulf Coast pelitic sediments Clays & Clay Minerals 18 165–177.CrossRefGoogle Scholar
Powers, M. C., 1967 Fluid-release mechanisms in compacting marine mudrocks and their importance in oil exploration Amer. Assoc. Petroleum Geol. Bull. 51 1240–1254.Google Scholar
Reynolds, R. C. Jr. and Hower, J., 1970 The nature of interlayering in mixed-layer illite/montmorillonite Clays & Clay Minerals 18 25–36.CrossRefGoogle Scholar
Roberson, H. E. and Lahann, H. E., 1981 Smectite to illite conversion rates: effects of solution chemistry Clays & Clay Minerals 29 129–135.CrossRefGoogle Scholar
Sayles, F. L., Mangelsdorf, P. C. Jr., 1977 The equilibration of clay minerals with seawater: exchange reactions Geochim. Cosmochim. Acta 41 951–960.CrossRefGoogle Scholar
Sayles, F. L., Mangelsdorf, P. C. Jr., 1979 Cation-exchange characteristics of Amazon River suspended sediment and its reaction with seawater Geochim. Cosmochim. Acta 43 767–779.CrossRefGoogle Scholar
Środoń, J., Eberl, D. and Bailey, S. W., 1984 Illite Micas, Reviews in Mineralogy, Vol. 13 Washington, D.C. Mineralogical Society of America 495–544.Google Scholar
Tabikh, A. A., Barshad, I. and Overstreet, R., 1960 Cation exchange hysteresis in clay minerals Soil Sci. 90 219–226.CrossRefGoogle Scholar
Tardy, Y., Duplay, J. and Fritz, B., 1985 The stability field of clay minerals as function of their composition and temperature of formation Abstracts, 1985 International Clay Conference, Denver, Colorado 234.Google Scholar
Veblen, D. R. and Shock, R. N., 1985 Extended defects and vacancy non-stoichiometry in rock-forming minerals Point Defects in Minerals, Geophysical Monograph Washington, D.C. American Geophysical Union 122–131.Google Scholar
Veblen, D. R. and Buseck, P. R., 1980 Microstructure and reaction mechanism in biopyriboles Amer. Mineral. 65 599–623.Google Scholar
Weaver, C. E. and Beck, K. C. (1971) Clay-water diagenesis during burial: how mud becomes gneiss: Geol. Soc. Amer. Spec. Pap. 134, 96 pp.Google Scholar
Weaver, C. E. and Pollard, L. D., 1973 The Chemistry of Clay Minerals Amsterdam Elsevier.Google Scholar
Yau, Y. C., Anovitz, L. M., Essene, E. J. and Peacor, D. R., 1984 Phlogopite-chlorite reaction mechanisms and physical conditions during retrograde reaction in the Marble Formation, Franklin, New Jersey Contrib. Mineral. Petrol. 88 299–308.CrossRefGoogle Scholar
Yau, Y. C., Lee, J. H., Peacor, D. R. and McDowell, S. D., 1983 TEM study of illite diagenesis in shale of Salton Sea geothermal field, California Program and Abstracts, 20th Annual Meeting New York Clay Minerals Society, Buffalo 42.Google Scholar
Yeh, H.-S. and Savin, S.M., 1977 The mechanism of burial diagenetic reactions in argillaceous sediments: 3. Oxygen isotope evidence Bull. Geol. Soc. Amer. 88 1321–1330.2.0.CO;2>CrossRefGoogle Scholar
Yoshida, T., 1973 Elementary layers in the interstratified clay minerals as revealed by electron microscopy Clays & Clay Minerals 21 413–420.CrossRefGoogle Scholar