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Distribution of authigenic albites in a limestone succession of the Helvetic Domain, eastern Switzerland

Rais, Pauline ; Louis-Schmid, Beat ; Bernasconi, Stefano ; Reusser, Eric ; Weissert, Helmut

In: Swiss Journal of Geosciences, 2008, vol. 101, no. 1, p. 99-106

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    Titel
    • Distribution of authigenic albites in a limestone succession of the Helvetic Domain, eastern Switzerland
    Autor
    • Rais, Pauline. Geological Institute, ETH Zurich, 8092, Zurich, Switzerland
    • Louis-Schmid, Beat. Geological Institute, ETH Zurich, 8092, Zurich, Switzerland
    • Bernasconi, Stefano. Geological Institute, ETH Zurich, 8092, Zurich, Switzerland
    • Reusser, Eric. Institute for Mineralogy and Petrology, ETH Zurich, 8092, Zurich, Switzerland
    • Weissert, Helmut. Geological Institute, ETH Zurich, 8092, Zurich, Switzerland
    Dokumententyp
    • Postprint
    Sprache
    • Englisch
    Veröffentlicht in
    • Swiss Journal of Geosciences, 2008, vol. 101, no. 1, p. 99-106. SP Birkhäuser Verlag Basel
    Andere elektronische Ausgabe
    OAI-PMH-ID
    • oai:doc.rero.ch:321343
    Summary
    A new occurrence of authigenic albite was found in a Jurassic sedimentary succession of the Glarus Nappe near Walenstadt (eastern Switzerland). The euhedral shape and the chemical purity of these albites are evidence for their authigenic origin. The crystals are irregularly distributed in the sediment, highlighting the importance of the host rock composition for albite authigenesis. The crystals occur exclusively in limestones with a carbonate content higher than 80 wt-%. A diagenetic or hydrothermal origin of albite authigenesis is discussed for the studied region. Clay mineral transformation appears to be an important source of ions for albite formation