Feldspars in sedimentary rocks

Morad, Sadoon

doi:10.1007/978-1-4020-3609-5_84

Sadoon Morad⁶

Part of the book series: Encyclopedia of Earth Sciences Series ((EESS))

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Feldspars are the most abundant mineral group in the Earth’s crust, mainly because they form at a wide range of temperature and pressure encountered in igneous, metamorphic and sedimentary environments. Feldspars in sedimentary rocks can be of detrital and diagenetic origins. Feldspars are a group of alumino-silicate minerals whose structures are composed of corner-sharing AlO₄ and SiO₄ tetrahedra linked in an infinite, three-dimensional array. Charge balancing, M cations with radius greater than 1.0Å occupy large, irregular cavities in the tetrahedral framework. The general chemical formula of feldspars is MT ₄O₈, where T is Al and Si, M is Na and/or K for alkali feldspars [(K,Na)AlSi₃O₈] and Ca for plagioclase (CaAl₂SiO₈). There are several polymorphs of K-feldspar minerals, including microcline (triclinic), orthoclase (monoclinic) and sanidine (monoclinic). Si/Al is ordered in orthoclase but disordered in sanidine. The Na-plagioclase (NaAlSi₃O₈) is albite, whereas Ca-plagioclase is...

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Biblography

Helmold, K.P., 1985. Provenance of feldspathic sandstones—the effect of diagenesis on provenance interpretations: a review. In Zuffa, G.G. (ed.), Provenance of Arenites. Dordrecht, D: Reidel Publishing Company, pp. 139–163.
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Morad, S., Bergan, M., Knarud, R., and Nystuen, J.P., 1990. Albitization of detrital plagioclase in Triassic reservoir sandstones from the Snorre Field, Norwegian North Sea. Journal of Sedimentary Petrology, 60: 411–425.
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Trevena, A.S., and Nash, W.P., 1981. An electron microprobe study of detrital feldspar. Journal of Sedimentary Petrology, 51: 137–150.
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Authigenesis Clay Minerals Diagenesis Provenance

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Department of Earth Sciences, Uppsala University, 752 36, Uppsala, Sweden
Sadoon Morad

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Sadoon Morad
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School of Geography and Geology, McMaster University, 1280 Main St West, Hamilton, ON, L8S 4K1, Canada
Gerard V. Middleton
Department of Geography, University of British Columbia, Vancouver, BC, V6T IZ2, Canada
Michael J. Church
Department of Earth Sciences, University of Waterloo, Waterloo, ON, N2L 3G I, Canada
Mario Coniglio
Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore, MD, 21218, USA
Lawrence A. Hardie
Department of Earth Sciences, University of Western Ontario, London, ON, N6A 5B7, Canada
Frederick J. Longstaffe

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Morad, S. (1978). Feldspars in sedimentary rocks. In: Middleton, G.V., Church, M.J., Coniglio, M., Hardie, L.A., Longstaffe, F.J. (eds) Encyclopedia of Sediments and Sedimentary Rocks. Encyclopedia of Earth Sciences Series. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-3609-5_84

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DOI: https://doi.org/10.1007/978-1-4020-3609-5_84
Published: 28 February 2013
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-0872-6
Online ISBN: 978-1-4020-3609-5
eBook Packages: Springer Book Archive

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