Carbonate Cements in the Tertiary Sandstones of the Swiss Molasse Basin: Relevance to Palaeohydrodynamic Reconstruction

  1. Sadoon Morad
  1. J. Mátyás

Published Online: 17 APR 2009

DOI: 10.1002/9781444304893.ch6

Carbonate Cementation in Sandstones: Distribution Patterns and Geochemical Evolution

Carbonate Cementation in Sandstones: Distribution Patterns and Geochemical Evolution

How to Cite

Mátyás, J. (1998) Carbonate Cements in the Tertiary Sandstones of the Swiss Molasse Basin: Relevance to Palaeohydrodynamic Reconstruction, in Carbonate Cementation in Sandstones: Distribution Patterns and Geochemical Evolution (ed S. Morad), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444304893.ch6

Author Information

  1. Geologisches Institut, Universität Bern, Baltzerstrasse 1, CH-3012 Bern, Switzerland

  1. HOT Engineering GmbH, Roseggerstrasse 15, A-8700 Leoben, Austria

Publication History

  1. Published Online: 17 APR 2009
  2. Published Print: 29 MAY 1998

ISBN Information

Print ISBN: 9780632047772

Online ISBN: 9781444304893

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Keywords:

  • carbonate cements in tertiary sandstones of Swiss Molasse Basin;
  • Swiss Molasse Basin (SMB);
  • detrital composition;
  • authigenic minerals;
  • authigenic K-feldspar on detrital K-feldspar grains

Summary

Depositional and tectonic variations are not reflected in the diagenetic history of the sandstones of the Lower Freshwater Molasse and Upper Marine Molasse in the Swiss Molasse basin. Calcite and pore-lining clays are the main cements in both units, the authigenic mineral assemblage and paragenesis are similar, and no major differences are detected in the stable isotopic composition of the authigenic calcites. Evidence from fluid inclusions and stable isotopes suggests that calcites precipitated early in the diagenetic history, from pore waters composed of variable proportions of the original marine and fresh formation waters. The mixing of these waters was probably related to compactional flow during subsidence. The isotopic signature of modern formation waters cannot be recognized among the diagenetic calcites. These facts emphasize the importance of early fluid flow history on porosity development in inverted foreland basins.