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Jurassic clay mineral assemblages and their post-depositional alteration: upper Great Estuarine Group, Scotland

Published online by Cambridge University Press:  01 May 2009

Julian E. Andrews
Julian E. Andrews
Affiliation:
Department of Geology, Leicester University, University Road, Leicester LEI 7RH, U.K.
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Abstract

Clay minerals from Middle Jurassic lagoonal mudrocks, siltstones and silty fine-grained sandstones of the upper Great Estuarine Group (Bathonian) are divided into four assemblages. Assemblage 1, the most common assemblage, is rich in mixed-layer illite–smectite with attendant illite and kaolinite. Assemblage 2 is dominated by smectitic clay. These assemblages are indicative of primary Jurassic deposition. Illite and kaolinite were probably derived from the weathering of older rocks and soils in the basin hinterland and were deposited in the lagoons as river-borne detritus. The majority of smectite and mixed-layer illite–smectite is interpreted as the argillization product of Jurassic volcanic dust, also deposited in the lagoons by rivers. Near major Tertiary igneous intrusions these depositional clay mineral assemblages have been altered. Assemblage 3 contains smectite-poor mixed-layer illite–smectite, whilst Assemblage 4 contains no smectitic clay at all. Destruction of smectite interlayers occurred at relatively shallow burial depths (< 2500 m) due to enhanced geothermal gradients and local convective hot-water circulation cells associated with the major Tertiary igneous intrusions.

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Articles
Information
Geological Magazine , Volume 124 , Issue 3 , May 1987 , pp. 261 - 271
Copyright
Copyright © Cambridge University Press 1987

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References

Amiri-Garoussi, K. 1977. Origin of montmorillonite in early Jurassic shales of north-west Scotland. Geological Magazine 114, 281–90.Google Scholar
Andrews, J. E. 1985. The sedimentary facies of a late-Bathonian regressive episode: The Kilmaluag and Skudiburgh Formations of the Great Estuarine Group, Inner Hebrides, Scotland. Journal of the Geological Society of London 142, 1119–37.CrossRefGoogle Scholar
Andrews, J. E. 1986. Microfacies and geochemistry of Middle Jurassic algal limestones from Scotland. Sedimentology 33, 499–520.CrossRefGoogle Scholar
Bain, D. C. & Russell, J. D. 1980. Swelling minerals in a basalt and its weathering products from Morvern, Scotland. 1. Interstratified montmorillonite–vermiculite–illite. Clay Minerals 15, 445–51.Google Scholar
Barshad, I. 1948. Vermiculite and its relation to biotite as revealed by base exchange reactions, X-ray analyses, differential thermal curves and water content. American Mineralogist 33, 655–78.Google Scholar
Biscaye, P. E. 1965. Mineralogy and sedimentation of Recent deep-sea clay in the Atlantic Ocean and adjacent seas and oceans. Geological Society of America Bulletin 76, 803–32.Google Scholar
Bradshaw, M. J. 1975. Origin of montmorillonite bands in the Middle Jurassic of eastern England. Earth and Planetary Science Letters 26, 245–52.Google Scholar
Brindley, G. W. 1980. Quantitative X-ray mineral analysis of clays. Chapter 7. In Crystal Structures of Clay Minerals and their X-ray Identification (eds. Brindley, G. W., Brown, G.), pp. 411–38. London: Mineralogical Society.CrossRefGoogle Scholar
Brown, G. & Brindley, G. W. 1980. X-ray diffraction procedures for clay mineral identification. Chapter 5. In Crystal Structures of Clay Minerals and their X-Ray Identification (eds. Brindley, G. W., Brown, G.), pp. 305–59. London: Mineralogical Society.Google Scholar
Chowdhury, A. N. 1982. Smectite, zeolite, biotite and apatite in the Corallian (Oxfordian) sediments of the Baulking area in Berkshire, England. Geological Magazine 119, 487–96.CrossRefGoogle Scholar
Curtis, C. D. 1985. Clay mineral precipitation and transformation during burial diagenesis. Philosophical Transactions of the Royal Society of London, Series A 315, 91–105.Google Scholar
Curtis, C. D., Brown, P. E. & Samogyi, V. A. 1969. A naturally occurring sodium vermiculite from Unst, Shetland. Clay Minerals 8, 15–19.Google Scholar
Dunoyer de Segonzac, G. 1970. The transformation of clay minerals during diagenesis and low grade metamorphism: a review. Sedimentology 15, 281–346.CrossRefGoogle Scholar
Hallam, A. 1975. Jurassic Environments. London: Cambridge Univeristy Press. 269 pp.Google Scholar
Hallam, A. 1984. Continental humid and arid zones during the Jurassic and Cretaceous. Palaeogeography, Palaeoclimatology, Palaeoecology 47, 195–223.Google Scholar
Hallam, A. & Sellwood, B. W. 1968. Origin of Fuller's Earth in the Mesozoic of southern England. Nature 220, 1193–5.Google Scholar
Harris, J. P. & Hudson, J. D. 1980. Lithostratigraphy of the Great Estuarine Group (Middle Jurassic), Inner Hebrides. Scottish Journal of Geology 16, 231–50.Google Scholar
Hoffman, J. & Hower, J. 1979. Clay mineral assemblages as low grade metamorphic geothermometers: application to the thrust faulted disturbed belt of Montana, USA. In Aspects of Diagenesis (eds. Scholle, P. A., Shluger, P. R.), pp. 55–79. Society of Economic Paleontologists and Mineralogists, Special Publication No. 26, Tulsa, Oklahoma.Google Scholar
Hower, J., Eslinger, E. V., Hower, E. & Perry, E. A. 1976. Mechanism of burial metamorphism of argillaceous sediment. 1. Mineralogical and chemical evidence. Geological Society of America Bulletin 87, 725–37.Google Scholar
Howitt, F., Aston, E. R. & Jacque, M. 1975. Occurrence of Jurassic volcanics in the North Sea. In Petroleum and the Continental Shelf of North-West Europe. I, Geology (ed. Woodland, A. W.), pp. 379–87. Barking, Essex: Applied Science Publishers.Google Scholar
Hudson, J. D. 1963. The recognition of salinity-controlled mollusc assemblages in the Great Estuarine Series (Middle Jurassic) of the Inner Hebrides. Palaeontology 6, 318–26.Google Scholar
Hudson, J. D. 1964. The petrology of the sandstones of the Great Estuarine Series, and the Jurassic palaeogeography of Scotland. Proceedings of the Geologists’ Association 75, 499–527.Google Scholar
Hudson, J. D. 1968. The microstructure and mineralogy of the shell of a Jurassic mytillid (Bivalvia). Palaeontology 11, 163–82.Google Scholar
Hudson, J. D. 1970. Algal limestones with pseudomorphs after gypsum from the Middle Jurassic of Scotland. Lethia 3, 11–40.Google Scholar
Hudson, J. D. 1980. Aspects of brackish-water facies and faunas from the Jurassic of north-west Scotland. Proceedings of the Geologists' Association 91, 99–105.CrossRefGoogle Scholar
Hudson, J. D. 1983. Mesozoic sedimentation and sedimentary rocks in the Inner Hebrides. Proceedings of the Royal Society of Edinburgh 83B, 47–63.Google Scholar
Hudson, J. D. & Harris, J. P. 1979. Sedimentology of the Great Estuarine Group (Middle Jurassic) of north-west Scotland. Symposim sur la Sédimentation de Jurassique Ouest Européen, Paris, 9–10 May, 1977. Association des Sédimentologistes Français.Google Scholar
Hurst, A. 1985. The implications of clay mineralogy to palaeoclimate and provenance during the Jurassic in NE Scotland. Scottish Journal of Geology 21, 143–60.CrossRefGoogle Scholar
Jeans, C. V. 1978. The origin of the Triassic clay assemblages of Europe with special reference to the Keuper Marl and Rhaetic of parts of England. Philosophical Transactions of the Royal Society of London, Series A 289, 549–639.Google Scholar
Jeans, C. V., Merriman, R. J., Mitchell, J. G. & Bland, D. J. 1982. Volcanic clays in the Cretaceous of southern England and Northern Ireland. Clay Minerals 17, 105–56.Google Scholar
Keller, W. D. 1970. Environmental aspects of clay minerals. Journal of Sedimentary Petrology 40, 788–813.Google Scholar
Knox, R. W. O’B. 1977. Upper Jurassic pyroclastic rocks in Skye, West Scotland. Nature 265, 323–4.Google Scholar
Long, G. & Neglia, S. 1968. Composition of l'eau interstitielle des argiles et diagenèse des minéraux argileux. Revue de l'institut Français de Pétrole 23, 53–69.Google Scholar
Rousseaux, J. M., Rouschet, P. G., Vielvoye, L. A. & Herbillon, A. J. 1973. The vermiculitization of trioctahedral micas. 1. The K level and its correlation with chemical composition. Clay Minerals 10, 1–16.Google Scholar
Savin, M. & Eslinger, E. V. 1976. Mineralogy and O18/O16 ratios of fine-grained quartz and clay from site 323. Initial Reports of the Deep Sea Drilling Project 35, 489–96.Google Scholar
Sawhney, B. L. 1977. Interstratification in layer silicates. Chapter 12. In Minerals in Soil Environments (ed. Dixon, J. B., Weed, S. B.), pp. 405–38. Madison, Wisconsin: Soil Science Society of America.Google Scholar
Sellwood, B. W. & Sladen, C. P. 1981. Mesozoic and Tertiary argillaceous units: distribution and composition. Quarterly Journal of Engineering Geology, London 14, 263–75.CrossRefGoogle Scholar
Shackleton, N. J. & Kennett, J. P. 1975. Palaeotemperature history of the Cenozoic and the initiation of Antarctic glaciation: oxygen and carbon isotope analyses in DSDP sites 277, 279 and 281. Initial Reports of the Deep Sea Drilling Project 29, 743–55.Google Scholar
Shaw, H. F. 1980. Clay minerals in sediments and sedimentary rocks. In Developments in Petroleum Geology - 2 (ed. Hobson, G. D.), pp. 53–85. Barking, Essex: Applied Science Publishers.Google Scholar
Shaw, H. F. 1981. Mineralogy and petrology of the argillaceous sedimentary rocks of the UK. Quarterly Journal of Engineering Geology, London 14, 277–90.CrossRefGoogle Scholar
Sladen, C. P. & Batten, D. J. 1984. Source-area environments of Late Jurassic and Early Cretaceous sediments in Southeast England. Proceedings of the Geologists' Association 95, 149–63.CrossRefGoogle Scholar
Tan, F. C. & Hudson, J. D. 1974. Isotopic studies on the palaeoecology and diagenesis of the Great Estuarine Series (Jurassic) of Scotland. Scottish Journal of Geology 10, 91–128.Google Scholar
Taylor, H. R. Jr., & Forester, R. W. 1971. Low-O18 igneous rocks from the intrusive complexes of Skye, Mull and Ardnamurchan, western Scotland. Journal of Petrology 12, 465–97.Google Scholar
Tilley, C. E. 1947. The gabbro-limestone contact zone of Camas Mor, Muck, Inverness-shire. Bulletin de la Commission Géologique de Finlande 140, 95–105.Google Scholar
Weaver, C. E. 1961. Clay minerals of the Ouachita structural belt and adjacent foreland. In The Ouachita System. Austin University of Texas Publication no. 6120, 401pp.Google Scholar
Weaver, C. E. & Pollard, L. D. 1973. The Chemistry of Clay Minerals. Developments in Sedimentology Series no. 15, Amsterdam: Elsevier. 213 pp.Google Scholar
Wedepohl, K. H. 1969. Composition and abundance of common sedimentary rocks. Chapter 8. In Handbook of Geochemistry, Vol. 1 (ed. Wedepohl, K. H.), pp. 250–71. Berlin: Springer-VerlagGoogle Scholar