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Changes in Particle Morphology During Illitization: An Experimental Study

Published online by Cambridge University Press:  28 February 2024

Gene Whitney
Affiliation:
U.S. Geological Survey, MS 904 Box 25046, Denver, Colorado 80225
Bruce Velde
Affiliation:
École Normale Supérieure, 24 rue Lhomond, 75231 Paris, France
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Abstract

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Smectite was reacted at several temperatures between 200°C and 500°C to produce interstratified illite/smectite (I/S) with different proportions of expandable layers. Dispersed and sedimented products were examined using a transmission electron microscope. Particle size and aspect ratio showed no systematic change as a function of reaction extent during R0 illitization. However, particles exhibited rounded edges during the early stages of the reaction, suggesting some dissolution of primary smectite. Additionally, increasing particle contrast in the electron beam suggests thickening of particles with increasing reaction extent. The thickening of particles is thought to be produced by the nucleation and precipitation of secondary illite layers on primary smectite layers. In the most extensively reacted I/S, particles have become aggregated into clumps or quasicrystals by lateral growth of illite layers. Internal uniformity of crystallographic alignment of individual growing crystals within each aggregate was reflected in the increasing frequency of 60° and 120° interfacial angles within each aggregate. In highly illitic I/S, these aggregates took on an overall euhedral form and became crystallographically contiguous, producing single crystal electron diffraction patterns.

Type
Research Article
Copyright
Copyright © 1993, The Clay Minerals Society

References

Ahn, J. H. and Peacor, D. R., 1986 Transmission and analytical electron microscopy of the smectite-to-illite transition Clays & Clay Minerals 34 165179 10.1346/CCMN.1986.0340207.Google Scholar
Andreoli, C. Y., Robert, M. and Pons, C. H., 1989 First steps of smectite-illite transformation with humectation and desiccation cycles Applied Clay Science 4 423435 10.1016/0169-1317(89)90020-3.CrossRefGoogle Scholar
Banfield, J. F., Jones, B. F. and Veblen, D. R., 1991 An AEM-TEM study of weathering and diagenesis, Abert Lake, Oregon: II. Diagenetic modification of the sedimentary assemblage Geochim. et Cosmochim. Acta 55 27952810 10.1016/0016-7037(91)90445-B.CrossRefGoogle Scholar
Baronnet, A., 1984 Growth kinetics of the silicates: A review of basic concepts Fortsch. Miner. 62 187232.Google Scholar
Corothers, W. W. and Kharaka, Y. K., 1978 Aliphatic acid anions in oil-field waters—Implications for origin of natural gas Am. Assoc. Petroleum Geol. Bull. 62 24412453.Google Scholar
Eberl, D. D. and Środoń, J., 1988 Ostwald ripening and interparticle-diffraction effects for illite crystals Amer. Mineral. 73 13351345.Google Scholar
Eberl, D. D., Środoń, J., Kralik, M., Taylor, B. E. and Peterman, Z., 1990 Ostwald ripening of clays and metamorphic rocks Science 248 474477 10.1126/science.248.4954.474.CrossRefGoogle Scholar
Eberl, D. D., Środoń, J., Northrop, H. R., Davis, J. A. and Hayes, K. F., 1986 Potassium fixation in smectite by wetting and drying Geochemical Processes at Mineral Surfaces Washington, D.C. American Chemical Society 296326.Google Scholar
Eberl, D. D., Whitney, G. and Khoury, H., 1978 Hydrothermal reactivity of smectite Amer. Mineral. 63 401409.Google Scholar
Freed, R. L. and Peacor, D. R., 1992 Diagenesis and the formation of authigenic illite-rich I/S crystals in Gulf Coast shales: TEM study of clay separates Jour. Sed. Petr. 62 220234.Google Scholar
Gaultier, J. P., Mamy, J., Mortland, M. M. and Farmer, V. C., 1979 Evolution of exchange properties and crystallographic characteristics of biionic K-Ca montmorillonite submitted to alternate wetting and drying Proc. Int. Clay Conf. 1978, Oxford Amsterdam Elsevier Scientific Publishing Company 167175.Google Scholar
Howard, J. J., Schultz, L. G., van Olphen, H. and Mumpton, F. A., 1987 Influence of shale fabric on illite/smectite diagenesis in the Oligocene Frio Formation, South Texas Proc. Inter. Clay Conf. 1985, Denver Bloomington, Indiana The Clay Minerals Society 144150.Google Scholar
Howard, J. J., 1991 Porosimetry measurement of shale fabric and its relationship to illite-smectite diagenesis Clays & Clay Minerals 39 355361 10.1346/CCMN.1991.0390403.CrossRefGoogle Scholar
Inoue, A., Kohyama, N., Kitagawa, R. and Watanabe, T., 1987 Chemical and morphological evidence for the conversion of smectite to illite Clays & Clay Minerals 35 111120 10.1346/CCMN.1987.0350203.CrossRefGoogle Scholar
Inoue, A., Velde, B., Meunier, A. and Touchard, G., 1988 Mechanism of illite formation during smectite-to-illite conversion in a hydrothermal system Amer. Mineral. 73 13251334.Google Scholar
Morse, J. W. and Casey, W. H., 1988 Ostwald processes and mineral paragenesis in sediments Amer. Jour. Sci. 288 537560 10.2475/ajs.288.6.537.CrossRefGoogle Scholar
Morton, J. P., 1985 Rb-Sr evidence for punctuated illite/smectite diagenesis in the Oligocene Frio Formation, Texas Gulf Coast Geol. Soc. Amer. Bull. 96 114122 10.1130/0016-7606(1985)96<114:REFPID>2.0.CO;2.2.0.CO;2>CrossRefGoogle Scholar
Nadeau, P. H. and Bain, D. C., 1986 Composition of some smectites and diagenetic illitic clays and implications for their origin Clays & Clay Minerals 34 455464 10.1346/CCMN.1986.0340412.CrossRefGoogle Scholar
Nadeau, P. H., Wilson, M. J., McHardy, W. J. and Tait, J. M., 1984 Interstratified clays as fundamental particles Science 225 923925 10.1126/science.225.4665.923.CrossRefGoogle ScholarPubMed
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 757769 10.1180/claymin.1984.019.5.06.CrossRefGoogle Scholar
Ohr, M., Halliday, A. N. and Peacor, D. R., 1991 Sr and Nd isotopic evidence for punctuated clay diagenesis, Texas Gulf Coast Earth Planet. Sci. Lett. 105 110126 10.1016/0012-821X(91)90124-Z.CrossRefGoogle Scholar
Plançon, A., Besson, G., Gaultier, J. P., Mamy, J., Tchoubar, C., Mortland, M. M. and Farmer, V. C., 1979 Qualitative and quantitative study of a structural reorganization in montmorillonite after potassium fixation Int. Clay Conf. 1978, Oxford Amsterdam Elsevier Scientific Publishing Company 4554.Google Scholar
Pollastro, R. M., 1985 Mineralogical and morphological evidence for the formation of illite at the expense of illite/smectite Clays & Clay Minerals 33 265274 10.1346/CCMN.1985.0330401.CrossRefGoogle Scholar
Pollastro, R. M., Nuccio, V. F. and Barker, C. E., 1990 The illite/smectite geothermometer—Concepts, methodology, and application to basin history and hydrocarbon generation Applications of Thermal Maturity Studies to Energy Exploration Tulsa Society of Economic Paleontologists and Mineralogists 118.Google Scholar
Quirk, J. P. and Aylmore, L. A. G., 1971 Domains and quasi-crystalline regions in clay systems Soil Sci. Soc. Amer. Proc. 35 652654 10.2136/sssaj1971.03615995003500040046x.CrossRefGoogle Scholar
Reynolds, R. C. Jr., Brindley, G. W. and Brown, G., 1980 Interstratified clay minerals Crystal Structures of Clay Minerals and Their X-ray Identification London Mineralogical Society 249304.CrossRefGoogle Scholar
Środoń, J., Andreoli, C., Elsass, F. and Robert, M., 1990 Direct high-resolution transmission electron microscopic measurement of expandability of mixed-layer illite/smectite in bentonite rocks Clays & Clay Minerals 38 373379 10.1346/CCMN.1990.0380406.CrossRefGoogle Scholar
Sunagawa, I., Koshino, Y., Asakura, M. and Yamamoto, T., 1975 Growth mechanisms of some clay minerals Fortschr. Miner. 52 217224.Google Scholar
Surdam, R. C., Crossey, L. J., Hagen, E. S. and Heasler, H. P., 1989 Organic-inorganic interactions and sandstone diagenesis Am. Assoc. Petroleum Geol. Bull. 73 123.Google Scholar
Tissot, B. P. and Weite, D. H., 1978 Petroleum Formation and Occurrence New York Springer-Verlag 10.1007/978-3-642-96446-6.CrossRefGoogle Scholar
Whalley, W. R. and Mullins, C. E., 1991 Effect of saturating cation on tactoid size distribution in bentonite suspensions Clay Miner. 26 1117 10.1180/claymin.1991.026.1.02.CrossRefGoogle Scholar
Whitney, G., 1990 Role of water in the smectite-to-illite reaction Clays & Clay Minerals 38 343350 10.1346/CCMN.1990.0380402.CrossRefGoogle Scholar
Whitney, G. and Northrop, H. R., 1988 Experimental investigation of the smectite to illite reaction—Dual reaction mechanisms and oxygen-isotope systematics Amer. Mineral. 73 7790.Google Scholar
Wollast, R. and Bricker, O. P., 1971 Kinetic aspects of the nucleation and growth of calcite from aqueous solutions Carbonate Cements Baltimore The Johns Hopkins Press 264273.Google Scholar