The study of the microstructures of clay sediments: a case study of marly sediments from N. Péloponnèse

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Publiée : août 1, 2018
DOI : https://doi.org/10.12681/bgsg.17352
Τ. Α. ΧΡΙΣΤΟΔΟΥΛΟΠΟΥΛΟΥ
University of Patras
Π. ΤΣΩΛΗ - ΚΑΤΑΓΑ
University of Patras
Γ. Χ. ΚΟΥΚΗΣ
University of Patras
Ν. ΚΟΝΤΟΠΟΥΛΟΣ
University of Patras
Résumé

This paper deals with the systematic study of the microstructural characteristics of clay sediments. These characteristics which are closely connected to the physical and mechanical character of the sediments, are concerned with: a)the structural constituents, b)the microporosity and c)the structural bonds of the sediments. For the determination of the structural characteristics of clay sediments the Scanning Electron Microscope (SEM) and the Optical Microscope are widely used with a supplementary mineralogical analysis of sediment components and the determination of several physical and mechanical characteristics. The observations under the microscope must be focused on the distribution of mineralogical facies and micropores, on the size and shape of clay (micro-)aggregates, as well as on the kind of authigenic facies (e.g. micrite, sparry calcite) which play the role of cementing material. The proposed methodology was applied to the study of the microstructures of marly sediments from Northern Péloponnèse and the following types of microstructures were determined: a)matrix-skeletal, mixed type, coarse dispersed of low orientation, b)matrix, coagulative, medium dispersed of medium orientation and c)crystallized-cementated, fine or medium dispersed of low orientation.

Article Details
  • Rubrique
  • Sedimentology
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Références
ADAMS, Α.Ε., MacKENZIE, W.S. & GUILFORD, C. (1984). Atlas of sedimentary rocks under the microscope. Longman Scientific & Technical. Copublished in the United States. 104 pp.
BAYNES, EJ. ,DEARMAN, W.R.(1978). Scanning electron microscope studies of weathered rocks : A review of Nomenclature and Methods. Bull. Int. Ass. Eng. Geol., No 18, 199-204.
COLLINS, Κ & McGOWN, A.(1974). The form and function of microfabric features in a variety of natural soils. Geotechnique, 24, 223-254.
GILLOTT, E.J. (1987). Clay in Engineering Geology. Elsevier, 449 pp..
GILLOTT, JE. (1969).Study of the fabric of fine-grained sediments with the Scanning Electron Microscope. Journal of Sedimentary Petrology, 39, 1, 90 - 105.
HOLTZ, D.R. & KOVACS, D.W.(1981).An Introduction to Geotechnical Engineering. Prenctice Hall, Inc., Englewood Cliffs, New Jersey, 733 pp.
MITCHELL, J.K. (1976). Fundamentals of Soil Behavior. John Wiley and Sons, Inc., N. York, 407 pp.
OSIPOV, V.l. (1990).Physico - chemical fundamentals of soil microrheology. Proc. of 6th International IAEG Congress, 713 - 724. Balkema, Rotterdam.
OSIPOV, V.l. (1978). Structural bonds as the basis of the engineering - geological classification of clayey soils. Proc. IUInt. Cong. IAEG, Sec. ÉÉ, Vol. 2, 160 - 165.
OSIPOV, V.l. (1988). Structural strength of soils and physico - mechanical fundamentals of its quantification. Engineering geology today : theory, problems, practics, 77-91. Moscow University Publisher.
SERGEYEV, Y.M., GRABOWSKA - OLSZEWSKA, B., OSIPOV, V.l., SOKOLOV, V.N. & KOLOMENSKI, Y.N. (1980). The classification of microstructures of clay soils. J. Microscopy, 120, 3, 237 - 260.
SERGEYEV, Y.M., OSIPOV, V.l. & SOKOLOV, VN.(1985). Quantitative analysis of soil structure with the microcomputer system. Bull. Int. Ass. Engn. Geol., N° 31, 131 - 136.
SOKOLOV, V.N. (1990).Engineering - geological classification of clay microstructures. Proc. of 6th Int. IAEG Congress, 753 - 760. Balkema, Rotterdam.
SOKOLOV, V.N. & O'BRIEN, N.R. (1990). A fabric classification of argillaceous rocks, sediments, soils. Appi. Clay Sci.,5, 353-360.
TERZAGHI, K. & PECK, R. (1969).Εφηρμοσμένη Εδαφομηχανική. Μετάφραση της δεύτερης έκδοσης. Τόμοι Α', Β', 825 σελ.
TOVEY, Ν.Κ. (1971). A selection of scanning electron micrographs of clays. CUED/C - SOIL/TR5a University of Cambridge, Department of Engineering.
WELTON, J.E. (1984).SEM Petrology Atlas. The American Association of Petroleum Geologists. 237 pp.
ΧΡΙΣΤΟΔΟΥΛΟΠΟΥΛΟΥ, T.A. (2000). Μικροδομή των λεπτομερών Νεογενών-Πλειστοκαινικών ιζημάτων της Βορείου Πελοποννήσου σε σχέση με τα φυσικά και μηχανικά χαρακτηριστικά τους. Διδακτορική διατριβή. Πανεπιστήμιο Πατρών, Τμήμα Γεωλογίας. Τόμος Α',464 σελ., Τόμος Β',130 σελ.
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