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Chemistry of Detrital Biotites and Their Phyllosilicate Intergrowths in Sandstones

Published online by Cambridge University Press:  02 April 2024

Ala Adin Aldahan  and
Sadoon Morad
Ala Adin Aldahan
Affiliation:
Department of Mineralogy and Petrology, Institute of Geology Uppsala University, Box 555, S-75122 Uppsala, Sweden
Sadoon Morad
Affiliation:
Department of Mineralogy and Petrology, Institute of Geology Uppsala University, Box 555, S-75122 Uppsala, Sweden
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Abstract

Microprobe analyses of optically homogeneous detrital biotites from sandstones of the Visingsö Group and the Dala Sandstone, Sweden, revealed a consistently low K content (generally <0.75 atom/formula unit) and variable amounts of Fe, Mg, Al, and Si. Electron probe profiles of some biotite grains indicated two major types of interstratification, one consisting of mainly illite layers and the other apparently consisting of chlorite layers. The layer thicknesses commonly ranged between 0.5 and 3 μm. Microprobe analyses of some thick (∼5 μm) illitic layers indicated a phengitic composition, wherein the mica was relatively rich in octahederal Fe and Mg. The chloritic layers appeared to be Fe-Mg-rich and generally had octahederal totals of <6 atom/formula unit. Variations in the chemical composition of the biotite and some of the illite and chlorite were probably due to an uneven distribution of small amounts of the interstratified phases. The illite and chlorite layers were apparently formed by pseudomorphic replacement of detrital biotites, i.e., gradual replacement of one biotite layer by one layer(s) of illite and/ or chlorite during diagenesis.

Keywords

BiotiteChemical analysisChloriteDiagenesisElectron probeIlliteIntergrowth
Type
Research Article
Information
Clays and Clay Minerals , Volume 34 , Issue 5 , October 1986 , pp. 539 - 548
Copyright
Copyright © 1986, The Clay Minerals Society

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References

AlDahan, A. A., 1985 Mineral diagenesis and petrology of the Dala Sandstone, central Sweden Bull. Geol. Inst. Uppsala 12 1–48.Google Scholar
AlDahan, A. A. and Morad, S., 1986 Mineralogy and chemistry of diagenetic clay minerals in Proterozoic sandstones from Sweden Amer. J. Sci. 286 29–80.CrossRefGoogle Scholar
Bayliss, S. W., 1975 Nomenclature of the trioctahedral chlorites Can. Mineral. 13 178–180.Google Scholar
Brindley, G. W., Zalba, P. E. and Bethke, C. M., 1983 Hydrobiotite, a regular 1:1 interstratification of biotite and vermiculite layers Amer. Mineral. 68 420–425.Google Scholar
Craig, J., Fitches, W. R. and Maltman, A. J., 1982 Chlorite-mica stacks in low-strain rocks from central Wales Geol. Mag. 119 243–256.CrossRefGoogle Scholar
Craw, D., Coombs, D. C. and Kawachi, Y., 1982 Interlayered biotite-kaoline and other altered biotite, and their relevance to the biotite isograde in eastern Otago, New Zealand Mineral. Mag. 45 79–85.CrossRefGoogle Scholar
Deer, W. A., Howie, R. A. and Zussman, J., 1966 An Introduction to the Rock-Forming Minerals London Longmans.Google Scholar
Foster, M. D. (1960) Interpretation of the composition of trioctahedral micas: Geol. Surv. Prof. Pap. 354–B, 49 pp.Google Scholar
Foster, M. D. (1962) Interpretation of the composition and a classification of the chlorites: Geol. Surv. Prof. Pap. 414–A, 33 pp.Google Scholar
Foster, M. D. and Swineford, A., 1963 Interpretation of the composition of vermiculites and hydrobiotites Clays and Clay Minerals, Proc. 10th Natl. Conf, Austin, Texas, 1961 New York Pergamon Press 70–89.Google Scholar
Gilkes, R. J., 1973 The alteration products of potassium depleted oxybiotite Clays & Clay Minerals 21 303–313.CrossRefGoogle Scholar
Gilkes, R. J. and Suddhiprakam, A., 1979 Biotite alteration in deeply weathered granite. I. Morphological, mineralogical and chemical properties Clays & Clay Minerals 27 349–360.CrossRefGoogle Scholar
Guidotti, C. V. and Bailey, S. W., 1984 Mica in metamorphic rocks Micas, Reviews in Mineralogy 13 Washington, D.C. Mineral. Soc. Amer. 375–456.Google Scholar
Iijima, S. and Zhu, J., 1982 Electron microscopy of a muscovite-biotite interface Amer. Mineral. 67 1195–1205.Google Scholar
Kossovskaya, A. G., Drits, V. A., Alexandrova, V. A., Rosenqvist, I. Th. and Petersen, P. G., 1965 On trioctahedral mica in sedimentary rocks Proc. Int. Clay Conf, Stockholm, 1963 Oxford Pergamon Press 147–169.Google Scholar
Merino, E. and Ransom, B., 1982 Free energies of formation of illite solid solutions and their compositional dependence Clays & Clay Minerals 30 29–39.CrossRefGoogle Scholar
Mitchell, J. G. and Taka, A. S., 1984 Potassium and argon loss patterns in weathered micas: implications for detrital mineral studies, with particular reference to the Triassic Palaeogeography of British Isles Sediment. Geol. 39 27–52.CrossRefGoogle Scholar
Morad, S., 1983 Diagenesis and geochemistry of the Visingsö Group (Upper Proterozoic), southern Sweden: a clue to the origin of color diiferentiation J. Sediment. Petrol. 53 51–65.Google Scholar
Morad, S., 1984 Diagenetic matrix in Proterozoic greywacke sandstones from Sweden J. Sediment. Petrol. 54 1157–1168.Google Scholar
Morad, S., 1986 Mica-chlorite intergrowths in very lowgrade metamorphosed sedimentary rocks from Norway Neues Jahrb. Mineral (in press).Google Scholar
Morad, S. and AlDahan, A. A., 1986 Diagenetic alteration of biotite in Proterozoic sedimentary rocks from Sweden Sediment. Geol. 47 95–107.CrossRefGoogle Scholar
Norrish, K. and Serratosa, J. M., 1973 Factors in the weathering of mica to vermiculite Proc. Internat. Clay Conf, Madrid, 1972 Madrid Div. de Ciencias 417–432.Google Scholar
Robert, M. and Pedro, G., 1969 Etude des relations entre les phénomènes d’oxydation et l’aptitude à l’ouverture dans les micas trioctaédriques Proc. Internat. Clay Conf, Tokyo 1969 455–473.Google Scholar
Ross, G. J. and Rich, C. I., 1974 Effect of oxidation and reduction on potassium exchange of biotite Clays & Clay Minerals 22 355–360.CrossRefGoogle Scholar
Speer, J. A. and Bailey, S. W., 1984 Micas in igneous rocks Mica, Reviews in Mineralogy 13 Washington, D.C. Mineralogical Society of America 299–356.Google Scholar
Veblen, D. R. and Ferry, J. M., 1983 A TEM study of the biotite-chlorite reaction and comparison with petrologic observations Amer. Mineral. 68 1160–1168.Google Scholar
Walker, G. F., 1949 The decomposition of biotite in the soil Mineral. Mag. 28 693–703.Google Scholar
Weaver, C. E. and Pollard, L. D., 1973 The Chemistry of Clay Minerals New York Elsevier 213.Google Scholar
White, S. H., Huggett, J. M. and Shaw, H. F., 1985 Electron-optical studies of phyllosilicate intergrowths in sedimentary and metamorphic rocks Mineral. Mag. 49 413–423.CrossRefGoogle Scholar
Wilson, M. J., 1970 A study of weathering in a soil derived from a biotite-homblende rock. I. Weathering of biotite Clay Miner. 8 291–303.CrossRefGoogle Scholar