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Volcanoclastic minerals of some Czechoslovakian tonsteins and their alteration

Published online by Cambridge University Press:  09 July 2018

Z. Weiss ,
A. Baronnet  and
M. Chmielova
Z. Weiss
Affiliation:
Coal Research Institute, 716 07 Ostrava-Radvanice, Czechoslovakia
A. Baronnet
Affiliation:
Centre de Recherche sur les Mecanismes de la Croissance Cristalline, CNRS, Campus Luminy, Case 913, 13288 Marseille Cedex 9, France
M. Chmielova
Affiliation:
Coal Research Institute, 716 07 Ostrava-Radvanice, Czechoslovakia
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Abstract

In the Czechoslovak part of the Upper Silesian Coal Basin (Ostrava-Karvina Coal Basin), only part of the Upper Carboniferous (Namurian A, B, C and Westphalian A) is well developed, and tonsteins, which are clayey rocks or claystones, occur as thin, clayey interlayers in the coal seams. Two types of primary volcanic mineral assemblages were identified in four tonstein samples from different coal seams; the first type is characterized by the presence of biotite and sanidine, and the second by the presence of biotite, bytownite and Ca-amphibole. All tonsteins studied contained kaolinite minerals, volcanic quartz grains, crystals of zircon and apatite. Separated biotite flakes with an admixture of kaolinite layers were identified as 1M polytype. The flakes without kaolinite minerals were identified as epitactic overgrowth of 1M and complex polytypes, and twinned crystals of 2M1 polytype. Kaolinization of biotite flakes was observed in all tonstein samples studied. Kaolinite single layers (7 Å) as well as two-layer polytype of kaolinite minerals (14 Å) sandwiched between biotite layers (10 Å) were identified by HRTEM imaging.

Type
Research Article
Information
Clay Minerals , Volume 27 , Issue 3 , September 1992 , pp. 269 - 282
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1992

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References

Ahn, J.H. & Peacor, F.R. (1987) Kaolinitization of biotite; TEM data and implications for an alteration mechanism. Am. Miner., 72, 353–356.Google Scholar
Banfield, J.F. & Eggleton, R.A. (1988) Transmission electron microscope study of biotite weathering. Clays Clay Miner., 36, 47–60.CrossRefGoogle Scholar
Bohor, B.F., (1978) Kaolinitic bentonite partings (tonstein) in coals of the western United States. Summaries—6th Int. Clay Conf. Oxford,, 713.Google Scholar
Bohor, B.F. (1985) Diagenesis of rhyolitic ash in coal-forming environments. Abstract 8th Int. Clay Conf. Denver. Google Scholar
Dopita, M. & Králik, J. (1977) Coal tonsteins in Ostrava-Karvina Coal Basin. Int. Colloq. Coal Tonsteins, Ostrava,, 213 pp. (in Czech).Google Scholar
Hawthorne, F.C. (1981) Crystal chemistry of the amphiboles. Pp. 1–95 in: Amphiboles and Other Hydrous Pyriboles-Mineralogy(Veblen, D.R., editor). Reviews in Mineralogy, Mineralogical Society of America, Washington, D.C. Vol. 9A.Google Scholar
Kroll, H. & Ribbe, P.H. (1987) Determining (Al,Si) distribution and strain in alkali feldspars using lattice parameters and diffraction-peak positions: A review. Am. Miner., 72, 491–506.Google Scholar
Loughnan, F.C. (1978) Flint clays, tonsteins and the kaolinite clayrock facies. Clay Miner., 13, 387–400.CrossRefGoogle Scholar
Millot, G. (1970) Geology of Clays. Springer-Verlag, New York.CrossRefGoogle Scholar
Moore, L.R. (1964) The in situformation and development of some kaolinite macrocrystals. Clay Miner. Bull. 5, 338–352.Google Scholar
Price, N.B. & Duff, P.M.D. (1969) Mineralogy and chemistry of tonsteins from Carboniferous sequences in Great Britain. Sedimentology, 13, 45–69.CrossRefGoogle Scholar
Ryer, T.A., Phillips, R.E., Bohor, B.F. & Pollastro, R.M. (1980) Use of altered volcanic ashfalls in stratigraphic studies of coal-bearing sequences: An example from the Upper Cretaceous Ferron Sandstone Member of the Mancos Shale in Central Utah. Geol. Soc. Am. Bull, part 1, 91, 579–586.Google Scholar
Senkayi, A.L., Dixon, J.B., Hossner, L.R., Abder-Ruhman, M. & Fanning, D.S. (1984) Mineralogy and genetic relationship of tonstein, bentonite, and lignitic strata in the Eocene Yeuga Formation of East Central Texas. Clays Clay Miner., 32, 259–271.CrossRefGoogle Scholar
Smith, J.V. (1974) Feldspar Minerals. I. Crystal Structure and Physical Properties. Springer-Verlag, Heidelberg.Google Scholar
Spears, D.A. & Kanaris-Sotiriou, R. (1979) A geochemical and mineralogical investigation of some British and other European tonsteins. Sedimentology, 26, 407–425.CrossRefGoogle Scholar
Triplehorn, D. & Bohor, B. (1986) Volcanic ash layers in coal: origin, distribution, composition and significance. In: Mineral Matter and Ash in Coal (Vorres, K.S., editor). American Chemical Society, Washington, DC. Google Scholar
Ushakova, E.N. (1971) Biotites of metamorphic rocks. Nauka, Moscow,, 345 pp. (in Russian).Google Scholar
Weiss, Z. & Wiewióra, A. (1986) Polytypism of micas. III. X-ray diffraction identification. Clays Clay Miner., 34, 53–68.CrossRefGoogle Scholar
Williamson, I.A. (1970) Tonsteins—their nature, origins and uses. Mining Mag., 122, 119–125.Google Scholar
Zhou, Y., Ren, Y. & Bohor, B.F. (1982) Origin and distribution of tonsteins in Late Permian Coal seams of southwestern China. Int. J. Coal Geology, 2, 49–77.CrossRefGoogle Scholar