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Transformation of Smectite to Illite In Bentonite and Associated Sediments from Kaka Point, New Zealand: Contrast in Rate and Mechanism

Published online by Cambridge University Press:  28 February 2024

Gejing Li ,
Donald R. Peacor  and
Douglas S. Coombs
Gejing Li*
Affiliation:
Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1063
Donald R. Peacor
Affiliation:
Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1063
Douglas S. Coombs
Affiliation:
Geology Department, University of Otago, Dunedin, New Zealand
*
†Current address Department of Geology, Arizona State University, Box 871404, Tempe, Arizona 85287-1404.
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Abstract

Smectite and mixed-layer illite/smectite (I/S) in Triassic heulandite-rich bentonite from Kaka Point, New Zealand, have been investigated by scanning electron microscopy (SEM), transmission electron microscopy/analytical electron microscopy (TEM/AEM) and X-raydiffraction (XRD) for comparison with matrix phyllosilicates in closely associated siltstones and analcimized tuff. Samples that were treated to achieve permanent expansion showed that some smectite in bentonite occurs as curved packets of wavy 10.5- to 13-Å layers enveloping relict glass shards, the centers of which consist of an amorphous clay precursor. The dominant clay minerals in bentonite are smectite-rich randomly disordered (R0) I/S with variable proportions of 10-Å illite-like interlayers, only locally organized as 1:1 ordered (R1) I/S. R0 I/S was also observed in separate packets retaining the detailed texture of packets that replaced shards. Such relations are consistent with a “solid-state”-like, layer-by-layer replacement of original smectite layers by illite-like layers with partial preservation of the primary smectite texture, in contrast to textures observed elsewhere, such as in Gulf Coast mudstones. The smectite, as in other examples in marine sediments, has K as the dominant interlayer cation, suggesting that precursor smectite may be a major K source for reaction to form illite.

Only a small proportion of illite (35%) occurs in mixed-layer smectite-rich I/S in bentonite and the dominant trioctahedral phyllosilicate is disordered high-Fe berthierine, implying that little mineralogical change has occurred with burial. This contrasts with observations of closely associated siltstones and analcimized tuff, which contain well-defined packets of illite and chlorite but which have no detectable matrix smectite component. These data imply that the rate of transformation of smectite to illite is much slower in bentonites than in associated sediments of the same burial depth and age. Such relations emphasize the significance of factors other than temperature, (e.g., organic acids, permeability and pore fluid compositions) in affecting the rate and degree (and perhaps mechanism) of transformation of smectite to illite.

Keywords

Analcimized TuffBentoniteBerthierineIllikeKaka PointMixedlayer I/SNew ZealandSiltstoneSmectiteZeolite Facies
Type
Research Article
Information
Clays and Clay Minerals , Volume 45 , Issue 1 , February 1997 , pp. 54 - 67
Copyright
Copyright © 1997, The Clay Minerals Society

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References

Ahn, J.H. and Peacor, D.R.. 1986. Transmission and analytical electron microscopy of the smectite-to-illite transition. Clays Clay Miner 34: 165–179.Google Scholar
Ahn, J.H. and Peacor, D.R.. 1987. Kaolinitization of biotite: TEM data and implications for an alteration mechanism. Am Mineral 72: 353–356.Google Scholar
Ahn, J.H. and Peacor, D.R.. 1989. Illite/smectite from Gulf Coast shales: A reappraisal of transmission electron microscope images. Clays Clay Miner 37: 542–546.Google Scholar
Ahn, J.H., Peacor, D.R. and Coombs, D.S.. 1988. Formation mechanisms of illite, chlorite and mixed layer illite-chlorite in Triassic volcanogenic sediments from the Southland Syncline, New Zealand. Contrib Mineral Petrol 99: 82–89.CrossRefGoogle Scholar
Boles, J.R.. 1971. Synthesis of analcime from natural heulandite and clinoptilolite. Am Mineral 56: 1724–1734.Google Scholar
Boles, J.R. and Coombs, D.S. 1975. Mineral reactions in zeolitic Triassic tuff, Hokonui Hills, New Zealand. Geol Soc Am Bull 86: 163–173.2.0.CO;2>CrossRefGoogle Scholar
Boles, J.R. and Coombs, D.S. 1977. Zeolite facies alteration of sandstones in the Southland Syncline, New Zealand. Am J Sci 277: 982–1012.CrossRefGoogle Scholar
Boles, J.R. and Franks, S.G.. 1979. Clay diagenesis in Wilcox sandstones of southwest Texas: Implications of smectite diagenesis on sandstone cementation. J Sed Petrol 49: 55–70.Google Scholar
Buatier, M., Peacor, D.R. and O'Neil, J.R.. 1992. Smectite-illite transition in Barbados accretionary wedge sediments: TEM and AEM evidence for dissolution/crystallization at low temperature. Clays Clay Miner 40: 65–80.CrossRefGoogle Scholar
Burst, J.F.. 1969. Diagenesis of Gulf Coast clayey sediments and its possible relation to petroleum migration. Am Assoc Petrol Geol Bull 53: 73–93.Google Scholar
Cliff, G. and Lorimer, G.W.. 1975. The quantitative analysis of thin specimens. J Microscopy 103: 203–207.CrossRefGoogle Scholar
Coombs, D.S.. 1965. Sedimentary analcime rocks and sodium-rich gneisses. Mineral Mag 34: 144–158.Google Scholar
Coombs, D.S.. 1993. Dehydration veins in diagenetic zone and their significance to mineral facies. J Metam Geol 11: 389–399.CrossRefGoogle Scholar
Coombs, D.S. and Cox, S.. 1991. Low and very low-grade meta-morphism in southern New Zealand. Geol Soc New Zealand Misc Publ 58. 78 p.Google Scholar
Coombs, D.S., Ellis, A.J., Fyfe, W.S. and Taylor, A.M.. 1959. The zeolite facies, with comments on the interpretation of hydro-thermal syntheses. Geochim Cosmochim Acta 17: 53–107.CrossRefGoogle Scholar
Eberl, D.D.. 1993. Three zones for illite formation during burial diagenesis and metamorphism. Clays Clay Miner 41: 26–37.CrossRefGoogle Scholar
Eggleton, R.A. and Keller, J.. 1982. The palagonitization of limburgite glass—A TEM study. N Jb Miner Mh H7: 321–336.Google Scholar
Essene, E.J. and Peacor, D.R.. 1995. Clay mineral thermometry: A critical perspective. Clays Clay Miner 43: 540–553.CrossRefGoogle Scholar
Freed, R.L. and Peacor, D.R.. 1989. Variability in temperature of the smectite/illite reaction on Gulf Coast sediments. Clay Miner 24: 171–180.CrossRefGoogle 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. J Sed Petrol 62: 220–234.Google Scholar
Grubb, S.M.B., Peacor, D.R. and Jiang, W.-T.. 1991. Transmission electron microscopy observations of illite polytypism. Clays Clay Miner 39: 540–550.CrossRefGoogle Scholar
Hillier, S., Matyas, J., Matter, A. and Vasseur, G.. 1995. Illite/smectite diagenesis and its variable correlation with vitrinite reflectance in the Pannonian Basin. Clays Clay Miner 43: 174–183.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. In: Scholle, P.A., Schluger, P.S., editors. Aspects of diagenesis. SEPM Spec Publ 26: 55–79.CrossRefGoogle Scholar
Hover, V.C., Walter, L.M., Peacor, D.R. and Martini, A.M.. 1995. K-uptake by smectite during early marine diagenesis in brackish and hypersaline depositional environments [abstract]. 32nd Clay Miner Soc Annual Meeting Program and Abstracts. p 61.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. Bull Geol Sci Am 87: 725–737.2.0.CO;2>CrossRefGoogle Scholar
Huang, W.-L., Longo, J.M. and Pevear, D.R.. 1993. An experimentally derived kinetic model for smectite-to-illite conversion and its use as a geothermometer. Clays Clay Miner 41: 162–177.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 Miner 35: 111–120.CrossRefGoogle Scholar
Inoue, A., Watanabe, T., Kohyama, N. and Brusewitz, A.M.. 1990. Characterization of illitization of smectite in bentonite beds at Kinekulle, Sweden. Clays Clay Miner 38: 241–249.CrossRefGoogle Scholar
Jiang, W.-T., Essene, E.J. and Peacor, D.R.. 1990. Transmission electron microscopic study of coexisting pyrophyllite and muscovite: Direct evidence for the metastability of illite. Clays Clay Miner 38: 225–240.CrossRefGoogle Scholar
Jiang, W.-T., Peacor, D.R., Merriman, R.J. and Roberts, B.. 1990. Transmission and analytical electron microscopic study of mixed-layer illite/smectite formed as an apparent replacement of product of diagenetic illite. Clays Clay Miner 38: 449–468.CrossRefGoogle Scholar
Jiang, W.-T., Nieto, F. and Peacor, D.R.. 1992. Composition of diagenetic illite as defined by analytical electron microscope analyses: Implications for smectite-illite-muscovite transition [abstract]. 29th IGC Meeting Program and Abstracts; Kyoto, Japan. p 100.Google Scholar
Kawano, M. and Tomita, K.. 1992. Formation of allophane and beidellite during hydrothermal alteration of volcanic glass below 200°C. Clays Clay Miner 40: 666–674.CrossRefGoogle Scholar
Kim, J.-W., Peacor, D.R., Tessier, D. and Elsass, F.. 1995. A technique for maintaining texture and permanent expansion of smectite interlayers for TEM observations. Clays Clay Miner 43: 51–57.CrossRefGoogle Scholar
Lahann, R.W.. 1980. Smectite diagenesis and sandstone cement: the effect of reaction temperature. J Sed Petrol 50: 755–760.CrossRefGoogle Scholar
Li, G., Mauk, J.L. and Peacor, D.R.. 1995. Preservation of clay minerals in the Precambrian (1.1 Ga) Nonesuch Formation in the vicinity of the White Pine copper mine, Michigan. Clays Clay Miner 43: 361–376.CrossRefGoogle Scholar
Masuda, H., Tanaka, H., Gamo, T., O'Neil, J.R., Peacor, D.R. and Jiang, W.-T.. 1992. Formation of authigenic smectite and zeolite and associated major element behavior during early diagenesis of volcanic ash in the Nankai Trough, Japan, ODP leg 131. In: Proc 7th International Symposium on Water-Rock Interaction. Rotterdam: Balkema. p 1659–1662.Google Scholar
Masuda, H., O'Neil, J.R., Jiang, W.-T. and Peacor, D.R.. 1996. Relation between interlayer composition of authigenic smectite, mineral assemblages, I/S reaction rate and fluid composition in silicic ash of the Nankai Trough. Clays Clay Miner 44: 443–459.CrossRefGoogle Scholar
Nadeau, P.H., Wilson, M.J., McHardy, W.J. and Tait, J.M.. 1985. The conversion of smectite to illite during diagenesis: Evidence from some illite clays from bentonite and sandstones. Mineral Mag 49: 393–400.CrossRefGoogle Scholar
Perry, E.A. and Hower, J.. 1970. Burial diagenesis in Gulf Coast pelitic sediments. Clays Clay Miner 29: 165–177.CrossRefGoogle Scholar
Perry, E.A. and Hower, J.. 1972. Later-stage dehydration in deeply buried pelitic sediments. Am Assoc Petrol Geol Bull 56: 2013–2021.Google Scholar
Pollastro, R.M.. 1989. Clay minerals as geothermometers and indicators of thermal maturity—Application to basin history and hydrocarbon generation. Am Assoc Petrol Geol Bull 73: 1171.Google Scholar
Pollastro, R.M.. 1990. The illite/smectite geothermometry—Concepts, methodology, and application to basin history and hydrocarbon generation. In: Nuccio, V.F., Barker, C.E., editors. Applications of thermal maturity studies to energy exploration, Rocky Mountain Section. Tulsa: SEPM. p 1–18.Google Scholar
Pollastro, R.M.. 1993. Considerations and applications of the illite/smectite geothermometer in hydrocarbon-bearing rocks of Miocene to Mississippian age. Clays Clay Miner 41: 119–133.CrossRefGoogle Scholar
Powers, M.C.. 1959. Adjustment of clays to chemical changes and the concept of the equivalent level. Clays Clay Miner 6: 309–326.CrossRefGoogle Scholar
Powers, M.C.. 1967. Fluid release mechanisms in compacting marine mudrocks and their importance in oil exploration. Am Assoc Petrol Geol Bull 51: 1240–1254.Google Scholar
Price, K.L. and McDowell, S.D.. 1993. Illite/smectite geothermometry of the Proterozoic Oronto Group, Midcontinent Rift System. Clays Clay Miner 41: 134–147.CrossRefGoogle Scholar
Pytte, A.M. and Reynolds, R.C. Jr. 1989. The thermal transformation of smectite to illite. In: Naeser, N.D., McColloh, T.H., editors. Thermal history of sedimentary basins. New York: Springer-Verlag. p 133–140.CrossRefGoogle Scholar
Ramseyer, K. and Boles, R.J.. 1986. Mixed-layer illite/smectite minerals in Tertiary sandstones and shales, San Joaquin Basin, California. Clays Clay Miner 34: 115–124.CrossRefGoogle Scholar
Shau, Y.-H. and Peacor, D.R.. 1992. Phyllosilicates in hydrothermally altered basalts from DSDP Hole 504B, Leg 83—A TEM and AEM study. Contrib Mineral Petrol 112: 119–133.CrossRefGoogle Scholar
Small, J.S.. 1994. Fluid composition, mineralogy and morphological changes associated with the smectite-to-illite reaction: an experimental investigation of the effect of organic acid anions. Clay Miner 29: 539–554.CrossRefGoogle Scholar
Small, J.S. and Manning, D.A.C.. 1993. Laboratory reproduction of morphological variation in petroleum reservoir clays: Monitoring of fluid composition during illite precipitation. In: Manning, D.A.C., Hall, P.L., Hughes, C.R., editors. Geochemistry of clay pore fluid interactions. London: Mineral Soc/Chapman and Hall. p 181–212.Google Scholar
Środoń, J. and Eberl, D.D.. 1984. Illite. In: Bailey, S.W., editor. Micas. Mineral Soc Am, Rev Mineral 13. p 495–544.CrossRefGoogle Scholar
Sucha, V., Kraus, I., Gerthofferova, H., Petes, J. and Serekova, M.. 1993. Smectite to illite conversion in bentonites and shales of the East Slovak Basin. Clay Miner 28: 243–253.CrossRefGoogle Scholar
Tazaki, K., Fyfe, W.S. and van der Gaast, S.J.. 1989. Growth of clay minerals in natural and synthetic glasses. Clays Clay Miner 37: 348–354.CrossRefGoogle Scholar
Tribble, J.S. and Wilkens, R.H.. 1994. Microfabric of altered ash layers, ODP leg 131, Nankai Trough. Clays Clay Miner 42: 428–436.CrossRefGoogle Scholar
Veblen, D.R.. 1992. Electron microscopy applied to nonstoichiometry, polysomatism, and replacement reactions in minerals. In: Buseck, P.R., editor. Minerals and reactions at the atomic scale: Transmission electron microscopy. Mineral Soc Am, Rev Mineral 27: 181–229.CrossRefGoogle Scholar
Velde, B., Suzuki, T. and Nicot, E.. 1986. Pressure-temperature-composition of illite/smectite mixed-layer minerals: Niger Delta mudstones and other examples. Clays Clay Miner 34: 435–441.CrossRefGoogle Scholar
Velde, B.. 1995. Comparative reaction rates of smectite to illite conversion in shales and volcanic ash layers [abstract]. 32nd Clay Miner Soc Annual Meeting Program and Abstracts. p 123.CrossRefGoogle Scholar
Watanabe, T.. 1981. Identification of illite/montomorillonite interstratification by X-ray powder diffraction. J Miner Soc Jpn, Spec Issue 15: 32–41.Google Scholar
Whitney, G.. 1990. Role of water in the smectite to illite reaction. Clays Clay Miner 38: 343–350.CrossRefGoogle Scholar
Yau, Y.-C., Peacor, D.R. and McDowell, S.D.. 1987. Smectite to illite reaction in Salton Sea shales: A transmission and analytical electron microscopy study. J Sed Petrol 57: 335–342.Google Scholar