How Important Is the Late Cimmerian Unconformity in Controlling Formation of Kaolinite in Sandstones of the North Sea?
Published:January 01, 1993
Per Arne Bjørkum, Ragnar Knarud, Morten Bergan, 1993. "How Important Is the Late Cimmerian Unconformity in Controlling Formation of Kaolinite in Sandstones of the North Sea?", Diagenesis and Basin Development, A. D. Horbury, A. G. Robinson
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Data on the content and distribution of kaolinite in the fluvial sandstones of the Statfjord Formation and the upper member of the Lunde Formation in the Snorre Field, northern North Sea, show no spatial relationship to the late Cimmerian unconformity. The reason is that the erosion rate during development of the unconformity was of the order of ten times greater than the propagation rate of the dissolution front in the sandstones caused by meteoric water flushing during subaerial exposure. This conclusion is consistent with similar observations from the nearby Gullfaks Field. It suggests that the diagenetic effect of the late Cimmerian unconformity on the underlying sandstones in the North Sea has been overestimated.
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Diagenesis and Basin Development
This publication grew out of a conference of the same name held in 1991. Most, though not all, of the chapters included in the volume were presented at that conference. The purpose of the volume is to examine links between sediment diagenesis--and consequent porosity and permeability modification--and aspects of the development of sedimentary basins. The papers in the book provide some important guidelines and insights that may be useful to the exploration geologist in the development of new play concepts, and to the academician many stimulating ideas for further research.