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Clay mineralogy and geochemistry of early Jurassic sedimentary rocks from the Moezian Platform, northern Bulgaria

Published online by Cambridge University Press:  09 July 2018

E. Hrischeva  and
S. Gier
E. Hrischeva*
Affiliation:
Geological Institute, Acad. G. Bonchev str. 24, 1113 Sofia, Bulgaria
S. Gier
Affiliation:
Instituteof Petrology, Universityof Vienna, Althanstraβe 14, 1090 Vienna, Austria
*
*E-mail: [email protected]
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Abstract

Clay minerals in early Jurassic sequences of shales, siltstones and sandstones deposited in non-marine, transitional and shallow marine environments have been examined by X-ray diffraction, electron microscopy and chemical analysis to study the relationship between clay minerals, their environment of deposition and subsequent diagenetic modifications.

The inherited clay mineral composition of the fine-grained sediments reflects the influence of climate, relief, source rocks and depositional processes. Inhomogeneous clay mineral assemblages, comprising abundant kaolinite and varying proportions of illite, I-S, chlorite and vermiculite, characterize fine-grained sediments from the non-marine and transitional environments. In shallow marine depositional environments clay mineral assemblages are more uniform, dominated by illite+I-S with minor kaolinite and chlorite.

The principal diagenetic process affecting fine-grained sedimentary rocks is the smectite–illite transformation. In sandstones, the authigenic formation of kaolinite, chlorite and illite appears to have been primarily determined by the environment of deposition.

Keywords

clay mineralsdepositional environmentdiagenesissedimentary rocks
Type
Research Article
Information
Clay Minerals , Volume 37 , Issue 3 , September 2002 , pp. 413 - 428
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2002

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References

Atanasov, A. (1983) Geotectonic evolution. Pp. 124–136 in: Geology and oil and gas perspectives of the Moesian Platform in central north Bulgaria (Atanasov, A. & Bokov, P., editors). Technica, Sofia.Google Scholar
Burton, J.H., Krinsley, D.H. & Pye, K. (1987) Authigenesis of kaolinite and chlorite in Texas Gulf Coast sediments. Clays and Clay Minerals, 35, 291–296.CrossRefGoogle Scholar
Caritat de, P., Bloch, J.D., Hutcheon, I.E. & Longstaffe, F.J. (1994) Compositional trends of a Cretaceous foreland basin shale (Belle Fourche Formation, Western Canada Sedimentary Basin): Diagenetic and depositional controls. Clay Minerals, 29, 503–526.Google Scholar
Chamley, H. (1989) Clay Sedimentology. Springer- Verlag, Berlin.Google Scholar
Curtis, C.D., Hughes, C.R., Whiteman, J.A. & Whittle, C.K. (1985) Compositional variation within some sedimentary chlorites and some comments on their origin. Mineralogical Magazine, 49, 375–386.Google Scholar
Debrabant, P., Delbart, S. & Lemaguer, D. (1985) Microanalyses geochimiques de mineraux argileux de sediments preleves et Atlantique Nord (Forages du DSDP). Clay Minerals, 20, 125–145.CrossRefGoogle Scholar
Ehrenberg, S.N. & Nadeau, P.H. (1989) Formation of diagenetic illite in sandstones of the Garn Formation, Haltenbanken area, mid-Norwegian Continental Shelf. Clay Minerals, 24, 233–253.Google Scholar
Gardner, T.W., Williams, E.G. & Holbrook, P.W. (1988) Pedogenesis of some Pennsylvanian underclays; ground-water, topographic, and tectonic controls. Pp. 81–101 in Paleosols and Weathering through Geologic Time: Principles and Applications (Reinhardt, J. & Sigleo, W.R., editors). Geological Society of America, Specical Paper 216.Google Scholar
Gibbs, R.G. (1977) Clay mineral segregation in the marine environment. Journal of Sediment ary Petrology, 47, 237–243.Google Scholar
Greenwood, P.J., Shaw, H.F. & Fallick, A.E. (1994) Petrographic and isotopic evidence for diagenetic processes in Middle Jurassic sandstones and mudrocks from the Brae area, North Sea. Clay Minerals, 29, 637–650.CrossRefGoogle Scholar
Hansen, P.L. & Lindgreen, H. (1989) Mixed-layer illite/ smectite diagenesis in Upper Jurassic claystones from the North Sea and onshore Denmark. Clay Minerals, 24, 197–213.Google Scholar
Hillier, S. (1994) Pore-lining chlorites in siliciclastic reservoir sandstones: electron microprobe, SEM and XRD data, and implications for their origin. Clay Minerals, 29, 665–679.Google Scholar
Huggett, J.M. (1984) Controls on mineral authigenesis in coal measure sandstones of the East Midlands, UK. Clay Minerals, 19, 343–357.Google Scholar
Huggett, J.M. (1996) Aluminosilicate diagenesis in a Tertiary sandstone-mudrock sequence from the central North Sea, UK. Clay Minerals, 31, 523–536.Google Scholar
Hurst, A. & Irwin, H. (1982) Geological modelling of clay diagenesis in sandstones. Clay Minerals, 17, 5–22.Google Scholar
Kantorowich, J. (1984) The nature, origin and distribution of authigenic clay minerals from Middle Jurassic Ravenscar and Brent Group sandstones. Clay Minerals, 19, 359–375.Google Scholar
Keller, W.D. (1978) Classification of kaolins exemplified by their textures in scan electron micrographs. Clays and Clay Minerals, 26, 1–20.CrossRefGoogle Scholar
Khrischev, Kh., Ruskova, N., Yanev, S., Georgiev, V., Atanasov, A., Mitov, P. & Todorov, L. (1995) Sedimentological factors determining the reservoir properties of Lower Jurassic terrigenous rocks in a part of the Moezian platform. Pp. 18–20 in: Abstracts from conference: Petroleum Potential of the Balkan region.Google Scholar
Köster, H.M. (1981) The crystal structure of 2:1 layer si licates. Pp. 41–71 in: Developments in Sedimentology (van Olphen, H. & Veniale, F., editors). Proceedings of the International Clay Conference, 1981. Elsevier, Amsterdam.Google Scholar
Nachev, I. (1976) Lithology of the Jurassic Sediments in Bulgaria. BAS, Sofia.Google Scholar
Nadeau, P.H. & Bain, D.C. (1986) Composition of some smectites and diagenetic illitic clays and implications for their origin. Clays and Clay Minerals, 34, 455–464.Google Scholar
Ortega-Huertas, M., Palomo, I., Moresi, M. & Oddone, M. (1991) A mineralogical and geochemical approach to establishing a sedimentary model in a passive continental margin (Subbet ic Zone , Bet ic Cordilleras, SE Spain). Clay Minerals, 26, 389–407.Google Scholar
Petrov, P., Bojadgieva, K., Gasharov, St. & Velinov, T. (1991) Thermal field and geothermal regime in Bulgaria. Reviews of the Bulgarian Geological Society,L II, 1, 60–64.Google Scholar
Reynolds, R.C. (1980) Interstratified clay minerals. Pp. 249–304 in. Crystal Structures of Clay Minerals and their X-ray Identification (Brindley, G.W. & Brown, G., editors). Monograph 5, Mineralogical Society, London.CrossRefGoogle Scholar
Sapunov, I.G., Tchoumatchenco, P.V. & Mitov, P.A. (1988) Jurassic development of Northwest Bulgaria. Geologica Balcanica, 18.1, 3–82.Google Scholar
Sapunov, I., Tchoumatchenco, P., Atanasov, A. & Marinkov, A. (1991) Central North Bulgaria during the Jurassic. Geologica Balcanica, 21.5, 3–68.CrossRefGoogle Scholar
Schultz, L.G. (1964) Quantitative interpretation of mineralogical composition from X-ray and chemical data for Pierre shale. US Geological Survey, Professional Paper 391–C.Google Scholar
Stefanov, D. (1981) Mineralogy and genesis of the clay component in the Mesozoic sediments from the Moesian Platform between the rivers Ogosta and Jantra. Geochemistry, Mineralogy and Petrology, 14, 83–97.Google Scholar
Whitehouse, U.G., Jeffrey, L.M. & Debrecht, J.D. (1960) Differential settling tendencies of clay minerals in saline waters. Clays and Clay Minerals, 7, 1–80.CrossRefGoogle Scholar
Whitney, G. & Northrop, H.R. (1988) Experimental investigation of the smectite to illite reaction: Dual reaction mechanisms and oxygen-isotope systematics. American Mineralogist, 73, 77–90.Google Scholar
Wilson, M.J., Bain, D.C., McHardy, W.J. & Berrow, M.L. (1972) Clay-mineral studies on some carboniferous sediments in Scotland. Sedimentary Geology, 8, 137–150.Google Scholar
Yoder, H.S. & Eugster, H.P. (1955) Synthetic and natural muscovites. Geochimica et Cosmochimica Acta, 8, 225–280.Google Scholar