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Authigenic albite in the Pendleside Formation (Dinantian) of northern England

Published online by Cambridge University Press:  01 May 2009

P. Turner ,
J. R. Ashworth  and
F. A. Iskenderian
P. Turner
Affiliation:
Department of Geological Sciences, The University of Ashton, Birmingham B4 7ET, U.K.
J. R. Ashworth
Affiliation:
Department of Geological Sciences, The University of Ashton, Birmingham B4 7ET, U.K.
F. A. Iskenderian
Affiliation:
Department of Geological Sciences, The University of Ashton, Birmingham B4 7ET, U.K.
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Summary

Authigenic albite occurring as euhedral overgrowths up to 400 μm in size is a characteristic feature of the Pendleside Limestone in the Craven Basin of northern England. The albite is very pure, low-albite in keeping with other authigenic albites in carbonate rocks. The detrital cores of the albites are angular plagioclase grains of approximately An20 composition which are sometimes altered to kaolinite. The albite crystals with their detrital cores are frequently concentrated in discrete laminae, suggesting that the plagioclase cores may have been supplied by a basic volcanogenic source. This view is supported by geochemical studies of limestones which reveal significant correlation between K–Na, Na–Al and K–Al.

Interstitial alteration of detrital components, in particular the reaction intermediate plagioclase → kaolinite + albite, was primarily responsible for albite authigenesis. The initial products of this reaction probably included smectite which fixed Mg2+ in the decomposing volcanic grains. Subsequent alteration of the smectite resulted in the formation of small microdolomite inclusions which are commonly seen in the authigenic albites. An equilibrium model in terms of Na+/H4 ratios and H4SiO4 activity is proposed for the silicate assemblages in the Pendleside Formation.

Type
Articles
Information
Geological Magazine , Volume 119 , Issue 4 , July 1982 , pp. 395 - 404
Copyright
Copyright © Cambridge University Press 1982

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References

Baskin, Y. 1956. A study of authigenic feldspars. J. Geol. 64, 132–55.CrossRefGoogle Scholar
Donnelly, T. W. 1967. Kinetic considerations in the genesis of growth twinning. Am. Miner. 52, 1–12.Google Scholar
Earp, J. R., Magraw, D., Poole, E. G., Land, D. H. & Whiteman, A. J. 1961. Geology of the country around Clitheroe and Nelson. Mem. geol. Surv. U.K.Google Scholar
Fewtrell, M. D. & Smith, D. G. 1980. Revision of the Dinantian stratigraphy of the Craven Basin, N. England. Geol. Mag. 117, 37–49.CrossRefGoogle Scholar
Francis, E. H. 1978. Igneous activity in a fractured craton: Carboniferous volcanism in northern Britain. In Crustal Evolution in Northwestern Britain and Adjacent Regions (ed. Bowes, D. R. and Leake, B. E.), pp. 279–96. Geol. J. Spec. Issue 10.Google Scholar
Füchtbauer, H. 1948. Einige Beobachtungen an authigenen Albiten. Schweizer min. pet. Mitt. 28, 709–16.Google Scholar
George, T. N., Johnson, G. A. L., Mitchell, M., Prentice, J. E., Ramsbottom, W. H. C., Sevastopulo, G. D. & Wilson, R. B. 1976. A correlation of Dinantian rocks in the British Isles. Spec. Rep. Geol. Soc. London 7.Google Scholar
Hay, R. L. 1966. Zeolites and zeolitic reactions in sedimentary rocks. Spec. Pap. geol. Soc. Am. 85.Google Scholar
Helgeson, H. C., Delany, J. M., Nesbitt, H. W. & Bird, D. K. 1978. Summary and critique of the thermodynamic properties of rock-forming minerals. Am. J. Sci. 278 A.Google Scholar
Kastner, M. 1971. Authigenic feldspars in carbonate rocks. Am. Miner. 56, 1403–42.Google Scholar
Kastner, M. & Siever, R. 1979. Low temperature feldspars in sedimentary rocks. Am. J. Sci. 279, 435–79.CrossRefGoogle Scholar
Kastner, M. & Waldbaum, D. R. 1968. Authigenic albite from Rhodes. Am. Miner. 53, 1579–602.Google Scholar
Ramsbottom, W. H. C., Goosens, R. F., Smith, E. G. & Calver, M. A. 1974. Carboniferous. In The Geology and Mineral Resources of Yorkshire (ed. Rayner, D. H. and Hemingway, J. E.), pp. 45–114. Northallerton: Yorkshire Geological Society.Google Scholar
Rose, G. 1865. Über die Krystallform des Albits von dem Roc-Tourne und von Bonhomme in Savoyen und des Albits in Allgemeinen. Ann. der Physik Chemie (Poggendorf) 41, 457–68.CrossRefGoogle Scholar
Royse, C. F., Wadell, J. S. & Peterson, L. E. 1971. X-ray determination of calcite-dolomite: an evaluation. J. sedimen. Petrol. 41, 483–8.Google Scholar