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Early carbonate diagenesis within Phanerozoic shales and sandstones of the NW European Shelf

Published online by Cambridge University Press:  09 July 2018

J. G. Gluyas
J. G. Gluyas*
Affiliation:
BP Petroleum Development Ltd, Farburn Industrial Estate, Dyce, Aberdeen AB2 0PB, UK
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Abstract

Continuous nodular limestone beds in north-west European shale sequences developed during early diagenesis via anaerobic, bacterial catabolysis of organic matter which yielded both carbonate and sulphide. The high carbonate content of the nodular limestones (50–90%) demonstrates that they developed in the upper tens of metres of the sediment column. In addition, each of the nodular limestones displays a centrifugal decrease in carbonate, indicating that growth was synchronous with compaction of the host ooze. The chemistry of the carbonate changed with time, becoming more rich in magnesium and iron and reflecting a progressive change in the porewater chemistry from its initially marine composition. The earliest precipitate was calcite containing < 1 mole% MgO; later precipitates contained several percent MgO and ultimately dolomite was precipitated. Similarly, iron content of the carbonate increased as precipitation continued and sulphate reduction, and thus pyrite production, declined. The early diagenetic cementation of many marine sandstones followed a pattern similar to that of nodular limestones and much of the carbonate was also derived from organic matter via bacterial oxidation. Thus, early diagenetic bacterial oxidation of organic matter may not only reduce the source potential of shales but also reduce the reservoir potential of associated sandstones, or those more distant which lie along compactional-fluid pathways.

Type
Research Article
Information
Clay Minerals , Volume 19 , Issue 3 , June 1984 , pp. 309 - 321
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1984

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References

Berner, R.A. (1971) Principles of Chemical Sedimentology. McGraw-Hill, New York, 240 pp.Google Scholar
Berner, R.A. (1980) Early Diagenesis. A Theoretical Approach. Princeton Series in Geochemistry. Princeton, N.J., 241pp.Google Scholar
Bjorlikke, K. (1973) Origin of limestone nodules in the Lower Palaeozoic of the Oslo Region. Norges. Geol. Tidsskr. 54, 413–415.Google Scholar
Coleman, M.L. (1977) Sulphur isotopes in petrology. J. Geol. Soc. 133, 593–608.Google Scholar
Coleman, M.L. (1980) Corrections for mass spectrometer analysis of SO2. IGS Stable Isotope Report 45 (unpublished).Google Scholar
Cox, A.H. (1923) In: Richardson, W.A. ‘Shales with Beef’: a sequence in the Lower Lias of the Dorset coast. Part III Petrology. Q. J. Geol. Soc. 73, 88–97.Google Scholar
Craig, H. (1957) Isotopic standards for carbon and oxygen and correction factors for mass-spectrometric analysis of carbon dioxide. Geochim. Cosmochim. Acta 12, 131–149.Google Scholar
Crimes, T.P. (1966) The relative age of some concretions in the Cambrian sediments of St. Tudwal's peninsula, North Wales. Geol. J. 5, 33–42.CrossRefGoogle Scholar
Curtis, C.D. (1978) Possible links between sandstone diagenesis and depth-related geochemical reactions occurring in enclosing mudstones. J. Geol. Soc. 135, 107–118.Google Scholar
Day, E.CH. (1865) On the Lower Lias of Lyme Regis. Geol. Mag. 2, 518–519.Google Scholar
Deegan, C.E. (1971) The mode of origin of some late diagenetic sandstone concretions from the Scottish Carboniferous. Scottish J. Geol. 7, 357–360.Google Scholar
Deines, P. (1970) Mass spectrometer correction factors for the determination of small Isotopic variation of carbon and oxygen. Int. J. Mass Spectrom. Ion Phys. 4, 283–295.Google Scholar
Folk, R.L. & Land, L.S. (1975) Mg/Ca ratio and salinity: two controls over crystallization of dolomite. Bull. Am. Ass. Petrol. Geol. 59, 60–68.Google Scholar
Gluyas, J.G. (1983) The genesis and diagenesis of shale nodular limestone sequences. PhD. Thesis, University of Liverpool.Google Scholar
Hallam, A. (1957) Primary origin of the limestone-shale rhythm in the British Lower Lias. Geol. Mag. 94, 175–176.Google Scholar
Harmes, J.C., Tackenberg, P., Pickles, E. & Pollock, R.E. (1981) The Brae oilfield area. Pp. 352–357 in: Petroleum Geology of the Continental Shelf of North-West Europe (Illing, L.V. & Hobson, G.D., editors). Heyden, London.Google Scholar
Henningsmoen, G. (1974) A comment. Origin of limestone nodules in the Lower Palaeozoic of the Oslo Region. Norges Geol. Tidsskr. 54, 401–412.Google Scholar
Heriter, F.E., Lossel, P. & Wathne, E. (1981) The Frigg gas field. Pp. 380–394 in: Petroleum Geology of the Continental Shelf of North-West Europe (Illing, L.V. & Hobson, G.D., editors). Heyden, London.Google Scholar
Hudson, J.D. (1978) Concretions, isotopes, and the diagenetic history of the Oxford Clay (Jurassic) of central England. Sedimentology 25, 339–370.Google Scholar
Irwin, H. (1980) Early diagenetic carbonate precipitation and pore fluid migration from the Kimmeridge Clay of Dorset. Sedimentology 27, 577–591.Google Scholar
Irwin, H., Curtis, C.D. & Coleman, M.L. (1977) Isotopic evidence for source of diagenetic carbonates formed during burial of organic-rich sediments. Nature 269, 209–213.Google Scholar
Irwin, H. & Hurst, A. (1983) Applications of geochemistry to sandstone reservoir studies. Pp. 127–146 in: Petroleum Geochemistry and Exploration of Europe (Brooks, J., editor). Geological Society Special Publication 12, Blackwell, Oxford.Google Scholar
Kastner, M. & Baker, P.A. (1984) A new insight into the origin of sedimentary dolomite. In: 1982 Yearbook of Science and Technology. McGraw-Hill, New York.Google Scholar
Lippmann, F. (1958) Geodon und Minerale des Barreme von Hoheneggelsem. Geol. Rdsch. 43, 475–503.Google Scholar
Maher, C.E. (1981) The Piper Oilfield. Pp. 358–370 in: Petroleum Geology of the Continental Shelf of North West Europe (Illing, L. V. & Hobson, G. D., editors). Heyden, London.Google Scholar
McCrea, J.M. (1950) On the isotopic chemistry of carbonates and a palaeo-temperature scale. J. Chem. Phys. 18, 849–857.Google Scholar
Nakai, N. & Jensen, M.L. (1964) The kinetic isotope effect in the bacterial reduction and oxidation of sulfur. Geochim. Cosmochim. Acta 28, 1893–1912.Google Scholar
Oertel, G. & Curtis, C.D. (1972) Clay-ironstone concretion preserving fabrics due to progressive compaction. Bull. Geol. Soc. Am. 83, 2597–2606.Google Scholar
Pettijohn, E.J. (1975) Sedimentary Rocks, 3rd edition. Harper, New York, 628 pp.Google Scholar
Raiswell, R.W. (1969) The geochemistry of carbonate concretions. MSc Thesis, University of Liverpool.Google Scholar
Raiswell, R.W. (1971) The growth of Cambrian and Liassic concretions. Sedimentology 17, 147–171.Google Scholar
Raiswell, R.W. (1973) The geochemistry and mineralogy of Liassic carbonate concretions. PhD Thesis, University of Liverpool.Google Scholar
Raiswell, R.W. (1976) The microbiological formation of carbonate concretions in the upper Lias of N.E. England. Chem. Geol. 18, 227–244.Google Scholar
Raiswell, R.W. & Plant, J. (1980) The incorporation of trace elements into pyrite during diagenesis of black shales, Yorkshire, England. Econ. Geol. 75, 584–599.Google Scholar
Rees, C.E. (1973) A steady-state model for sulphur isotope fractionation in bacterial reduction processes. Geochim. Cosmochim. Acta 44, 2045–2049.Google Scholar
Robinson, B.W. & Kusakabe, M. (1975) Quantitative preparation of sulfur dioxide for S/S analyses, from sulfides by combustion with cuprous oxide. Anal. Chem. 47, 1179–1181.Google Scholar
Trudinger, P.A. & Chambers, L.A. (1973) Reversibility of bacterial sulphate reduction and its relevance to Isotopic fractionation. Geochim. Cosmochim. Acta 37, 1775–1778.Google Scholar
Weeks, L.G. (1953) Environment and mode of origin and facies relationships of carbonate concretions in shales. J. Sedim. Petrol. 23, 162–173.Google Scholar
Weeks, L.G. (1957) Origin of carbonate concretions in shales, Magdalena Valley, Columbia. Bull. Am. Ass. Petrol. Geol. 43, 273–310.Google Scholar