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Scan Electron Micrographs of Kaolins Collected from Diverse Environments of Origin—I

Published online by Cambridge University Press:  01 July 2024

W. D. Keller
W. D. Keller*
Affiliation:
University of Missouri-Columbia
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Abstract

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Scan electron micrographs are shown of (1) kaolinite and dickite which crystallized from solution within cavities, (2) kaolinite weathered from clastic primary silicate material, (3) residual kaolinite from primary silicate rock, (4) kaolinite above and below a basal unconformity on granitic rock, and (5) hydrothermally altered kaolinite. The texture of kaolin reflects the environment in which the clay was formed.

Euhedral crystals of kaolin minerals characterize cavity fillings. The weathering environment produces large crystal flakes of kaolinite, expanded books, mats of elongates, high porosity, and low bulk density (less than 2.0). The hydrothermal environment produces smaller crystals, singles, sheaves and packets of crystals, low porosity and high bulk density (2.0 and above).

The interrelationships of genetic environment of kaolin minerals and accompanying texture are discussed in light of available geochemical information.

Type
Research Article
Information
Clays and Clay Minerals , Volume 24 , Issue 3 , June 1976 , pp. 107 - 113
Copyright
Copyright © 1976 The Clay Minerals Society

References

Angel, B. R., Jones, P. and Richards, K. (1974) Synthetic kaolinites—general comments: Proc. Symp. Correlation of Age and Genesis of Kaolin, Exeter, England, in press; also (1974) Chemical Geology 13, 97–113.Google Scholar
Baumann, D. and Keller, W. D. (1975–76) Bulk densities of selected dried natural and fired kaolin clays: Clays & Clay Minerals 23, 424–427.CrossRefGoogle Scholar
Bayliss, P., Longhnan, F. D. and Standard, J. C. (1965) Dickite in Hawkesbury sandstone of the Sydney basin, Australia: Am. Miner. 50, 418–426.Google Scholar
Bellman, H. J. (1975) Graywacke kaolin in the Leipzig area: In Kaolin Deposits of the GDR in the Northern Region of the Bohemian Massif (Edited by Störr, M.) pp. 207–215 (See reference to Störr, 1975).Google Scholar
Busenberg, E. and Clemency, C. V. (1976) The dissolution kinetics of feldspars at 25°C and 1 atm CO2 partial pressure: Geochim. et Cosmochim. Acta 40, 41–50.CrossRefGoogle Scholar
Committee on Correlation of Age and Genesis of Kaolin (1972): Session at AIPEA meeting, Madrid.Google Scholar
Chukhrov, F. V. (1968) Some results of clay mineral studies in the USSR: Clays & Clay Minerals 16, 3–14.CrossRefGoogle Scholar
Dick, A. B. (1888) On kaolinite: Min. Mag. 8, 15–27.Google Scholar
Ferrero, J. and Kubler, B. (1964) Presence de dickite et kaolinite dans les grès Cambriens d'Hassi Messaoud: Bull. Serv. Carte Geol. Als. Lorr. 17, 247–261.Google Scholar
Harder, H. (1974) Illite mineral synthesis at surface temperatures: Chem. Geol. 14, 241–253.CrossRefGoogle Scholar
Hayes, J. B. (1963) Kaolinite from Warsaw geodes, Keokuk region: Iowa, Iowa Acad. Sci. 70, 261–272.Google Scholar
Hem, J. D., Roberson, C. E., Lind, C. J. and Polzer, W. L. (1973) Chemical interactions of aluminum with aqueous silica at 25°C.: U.S. Geol. Surv. Water Sup. Paper 1827-E, 57 pp.Google Scholar
Huang, W. H. and Keller, W. D. (1970) Dissolution of rock-forming silicate minerals in organic acids: Simulated first-stage weathering of fresh mineral surfaces: Am. Miner. 55, 2076–2094.Google Scholar
Keller, W. D. (1963) Hydrothermal kaolinization (endellitization) of volcanic glassy rock: Proc. 10th Conf. Clays & Clay Minerals pp. 333–343.Google Scholar
Keller, W. D. (1970) Environmental aspects of clay minerals: J. Sedim. Petrol., 40, 788–813.CrossRefGoogle Scholar
Keller, W. D., Balgord, W. D. and Reesman, A. L. (1963) Dissolved products of artificially pulverized silicate rocks and minerals—I: J. sed. Petrol. 33, 191–204.CrossRefGoogle Scholar
Keller, W. D., Pickett, E. E. and Reesman, A. L. (1966) Elevated dehydroxylation temperature of the Keokuk geode kaolinite—a possible reference mineral: Proc. Int. Clay Conf., 1966, Jerusalem, Israel 1, 75–85.Google Scholar
Keller, W. D. and Hanson, R. F. (1968) Hydrothermal alteration of a rhyolite flow breccia near San Luis Potosi, Mexico, to refractory kaolin: Clays & Clay Minerals 16, 223–229.CrossRefGoogle Scholar
Keller, W. D. and Hanson, R. F. (1969a) Hydrothermal argillation of volcanic pipes in limestone in Mexico: Clays & Clay Minerals 17, 9–12.CrossRefGoogle Scholar
Keller, W. D. and Hanson, R. F. (1969b) Classification and problems of hydrothermal refractory clay deposits in Mexico: Proc. Int. Clay Conf., Tokyo, 1969 1, 305–312.Google Scholar
Keller, W. D. and Hanson, R. F. (1975) Dissimilar fabrics by scan electron microscopy of sedimentary vs hydrothermal kaolins in Mexico: Clays & Clay Minerals 23, 201–204.CrossRefGoogle Scholar
Kesler, T. L. (1970) Hydrothermal kaolinization in Michoacan, Mexico: Clays & Clay Minerals 18, 121–124.CrossRefGoogle Scholar
Konta, J. and Koscelnik, S. (1968) Petrographical types of kaolin in the Karlovy Vary granite massif: Proc. XXIII Int. Geol. Cong. 14, 79–94.Google Scholar
Kromer, H. and Köster, H. M. (1974) Clay and kaolin deposits of Eastern Bavaria: Fortschr. Mineral. 52, 123–138.Google Scholar
Murray, H. (1975) Alteration of a granite to kaolin-mineralogy and geochemistry: Abstract, Int. Kaolin Symp. Dresden, GDR, Sept. 1975 p. 19 (See reference to Störr, 1975).Google Scholar
Ponder, H. and Keller, W. D. (1960) Geology, mineralogy, and genesis of selected fireclays from Latah County, Idaho: Proc. 8th Nat. Conf. Clays & Clay Minerals. Pergamon Press, Oxford, pp. 44–62.CrossRefGoogle Scholar
Ross, C. S. and Kerr, P. F. (1930) The kaolin minerals: U.S. Geol. Surv. Prof. Paper 165E, pp. 151–176.Google Scholar
Sand, L. B. (1956) On the genesis of residual kaolins: Am. Miner. 41, 28–40.Google Scholar
Schroeder, R. J. and Hayes, J. B. (1968) Dickite and kaolinite in Pennsylvanian limestones of southeast Kansas: Clays & Clay Minerals 16, 41–50.CrossRefGoogle Scholar
Störr, M. (1975) Kaolin Deposits of the GDR in the Northern Region of the Bohemian Massif. This volume was a guidebook to field trips of the International Kaolin-Symposium, Committee on Correlation of Age and Genesis of Kaolin, held in Dresden. Publication by Ernst-Moritz-Arndt Universitat Greifswald, Greifswald, East Germany, 12 papers, 243 pp.Google Scholar
Störr, M. and Buchwald, J. (1975) The kaolin deposits “Caminau” and “Wiesa” of the Lusatian granodiorite massif: Kaolin Deposits of the GDR in the Northern Region of the Bohemian Massif (Edited by Störr) pp. 104–126.Google Scholar
Störr, M. and Ruchholz, M. (1975) The Pre-Cenomanian weathering crusts in the GDR—Exposures at Dohna and the Gotzenbuschel Hill: Kaolin Deposits of the GDR in the Northern Region of the Bohemian Massif (Edited by Störr), pp. 172–188.Google Scholar
Tarr, W. A. and Keller, W. D. (1936) Dickite in Missouri: Am. Miner. 21, 109–114.Google Scholar
Tarr, W. A. and Keller, W. D. (1937) Some occurrences of kaolinite deposited from solution: Am. Miner. 22, 933–935.Google Scholar
Vachtl, J. (1968) Review of kaolin deposits of Europe: Proc. XXIII Int. Geol. Cong. 15, 13–24.Google Scholar