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Mineralogical and chemical evolution of white micas and chlorites, from diagenesis to low-grade metamorphism; data from various size fractions of greywackes (Middle Cambrian, Morocco)

Published online by Cambridge University Press:  05 July 2018

E. Wybrecht ,
J. Duplay ,
A. Piqué  and
F. Weber
E. Wybrecht
Affiliation:
Institut de Géologie et Centre de Sédimentologie et de Géochimie de la Surface, 1 rue Blessig, 67084 Strasbourg Cedex, France
J. Duplay
Affiliation:
Institut de Géologie et Centre de Sédimentologie et de Géochimie de la Surface, 1 rue Blessig, 67084 Strasbourg Cedex, France
A. Piqué
Affiliation:
Institut de Géologie et Centre de Sédimentologie et de Géochimie de la Surface, 1 rue Blessig, 67084 Strasbourg Cedex, France
F. Weber
Affiliation:
Institut de Géologie et Centre de Sédimentologie et de Géochimie de la Surface, 1 rue Blessig, 67084 Strasbourg Cedex, France
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Abstract

Four size fractions have been separated and studied in eight samples of Cambrian greywackes, ranging from non-metamorphic to low metamorphic grade. Chemical study included analyses of each size fraction and comparison with the whole rock analysis. Mineralogical study involved analyses of individual crystals using microprobe (> 6 µm) and STEM (< 6 µm). This showed that in each fraction, a progressive homogenization of the mineralogical composition occurred during the development of metamorphism; that chemical transfers especially of Fe-Mg and K-Na, occurred between fine and coarse fractions and that recrystallization in fine and coarse fractions was simultaneous.

Keywords

micachloritediagenesismetamorphismgreywackesMoroccoCambrian
Type
Research Article
Information
Mineralogical Magazine , Volume 49 , Issue 352 , June 1985 , pp. 401 - 411
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1985

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References

Dunoyer de Segonzac, G. (1969) Mém. Serv. Carte Géol. AIs. Loft. 29, 1–320.Google Scholar
Duplay, J. (1982) Thése 3e cycle, Univ. Poitiers.Google Scholar
Frey, M. (1970) Sedimentology, 15, 261-79.CrossRefGoogle Scholar
Frey, M. (1978) J. Petrol. 19, 93–135.Google Scholar
Kisch, H. J. (1980) J. Geol. Soc. London, 137, 271-88.CrossRefGoogle Scholar
Kubler, B. (1964) Rev. Inst.fr. Petrol. 19, 1093-113.Google Scholar
Kubler, B. (1966) In Colloque sur les étages tectoniques. La Baconnière, Neuchâtel, Switzerland, 105-22.Google Scholar
Kubler, B. (1968) Bull. Centre Rech. Pau S.N.P.A. 2, 385-97.Google Scholar
Liewig, N. (1981) Thèse 3e cycle, Univ. of Strasbourg.Google Scholar
McDowell, S. D., and Elders, W. A. (1980) Contrib. Mineral. Petrol. 74, 293-310.CrossRefGoogle Scholar
Millot, G. (1964) Géologie des argiles, Masson et Cie, Paris, 499 pp.Google Scholar
Nicot, E. (1981) Bull. Minéral. 104, 615-24.CrossRefGoogle Scholar
Parker, A., Allen, J., and Williams, B. (1983) J. Geol. Soc. London, 140, 769-79.CrossRefGoogle Scholar
Piqué, A. (1979) Sci. Géol., Mém. 56, 1–243.Google Scholar
Piqué, A., Jeannette, D., and Michard, A. (1980) J. Struct. Géol. 2, 55–61.CrossRefGoogle Scholar
Teichmüller, M., Teichmüller, R., and Weber, K. (1979) Fortschr. Geol. Rheinl. u. Westf. 27, 201-76.Google Scholar
Velde, B. (1967) Contrib. Mineral. Petrol. 14, 250-8.CrossRefGoogle Scholar
Weaver, C. E. (1960) Bull. Am. Assoc. Petrol. Geol. 44, 1505-18.Google Scholar
Weber, K. (1972) Neues Jahrb. Geol. Paläont. Abh. 141, 333-63.Google Scholar
Winkler, H. (1976) Petrogenesis of metamorphic rocks. Springer-Verlag, New York.CrossRefGoogle Scholar
Wybrecht, E. (1984) Thèse de 3e cycle. Univ. of Strasbourg.Google Scholar
Wybrecht, E., Piqué, A., and Weber, F. (1983) EUG Meeting, Strasbourg, abstr.Google Scholar