Carbonate Diagenesis and Porosity Evolution in Sheet-Flood Sandstones: Evidence from the Middle and Lower Lunde Members (Triassic) in the Snorre Field, Norwegian North Sea

  1. Sadoon Morad
  1. S. Morad1,
  2. L. F. de Ros1,†,
  3. J. P. Nystuen2 and
  4. M. Bergan2

Published Online: 17 APR 2009

DOI: 10.1002/9781444304893.ch3

Carbonate Cementation in Sandstones: Distribution Patterns and Geochemical Evolution

Carbonate Cementation in Sandstones: Distribution Patterns and Geochemical Evolution

How to Cite

Morad, S., de Ros, L. F., Nystuen, J. P. and Bergan, M. (1998) Carbonate Diagenesis and Porosity Evolution in Sheet-Flood Sandstones: Evidence from the Middle and Lower Lunde Members (Triassic) in the Snorre Field, Norwegian North Sea, in Carbonate Cementation in Sandstones: Distribution Patterns and Geochemical Evolution (ed S. Morad), Blackwell Publishing Ltd., Oxford, UK. doi: 10.1002/9781444304893.ch3

Author Information

  1. 1

    Sedimentary Geology Research Group, Institute of Earth Sciences, Uppsala University, S-752 36 Uppsala, Sweden

  2. 2

    Saga Petroleum, Kjørboveien 16, PO Box 490, N-1301 Sandvika, Norway

  1. Universidade Federal do Rio Grande do Sul, Instituto de Geociências, Departamento de Mineralogia e Petrologia, Av. Bento Gonçalves, 9500, CEP 91501-970 Porto Alegre, RS, Brazil

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 diagenesis and porosity evolution in sheet sandstones;
  • Middle and Lower Lunde Members in Snorre Field, Norweigian North Sea;
  • stratigraphy of Tampen Spur area;
  • burial history of Middle and Lower Lunde Members;
  • petrography and chemistry of diagenic minerals;
  • dolomite and ankerite

Summary

Facies-related cementation and porosity reduction occurred in Triassic sheet-flood sandstones of the Lower and Middle Members of the Lunde Formation (the Snorre Field, Norwegian North Sea). These processes took place during near-surface eodiagenesis and syncompaction to mesodiagenesis. The early cements are dominated by calcite, dolomite and siderite, which were precipitated at ≤30°C and postdate some of the authigenic kaolinite. The precipitation temperatures of syncompactional to mesogenetic calcite and dolomite/ankerite are calculated to be 30–70°C and 40–90°C, respectively. Meteoric telodiagenesis during the Kimmerian uplift (late Jurassic-early Cretaceous) resulted in the dissolution of carbonate cement and of framework silicates, as well as in the precipitation of kaolinite. This telogenetic kaolinite was formed in sandstones located a few tens of metres below the unconformity.