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Deformation of Anhydrite–gypsum rocks in central Spitsbergen

Published online by Cambridge University Press:  01 May 2009

W. B. Harland ,
A. Mann  and
C. Townsend
W. B. Harland
Affiliation:
Cambridge Arctic Shelf Programme, West Building, Department of Earth Sciences, University of Cambridge, Gravel Hill, Huntingdon Road, Cambridge CB3 0DJ, U.K.
A. Mann
Affiliation:
Cambridge Arctic Shelf Programme, West Building, Department of Earth Sciences, University of Cambridge, Gravel Hill, Huntingdon Road, Cambridge CB3 0DJ, U.K.
C. Townsend
Affiliation:
Cambridge Arctic Shelf Programme, West Building, Department of Earth Sciences, University of Cambridge, Gravel Hill, Huntingdon Road, Cambridge CB3 0DJ, U.K.
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Abstract

Early Permian anhydrite–gypsum strata in central Spitsbergen show deformation of sulphate nodules in dolostone (chicken-wire structure) to varying degrees from imbricate to extreme flattening and elongation. These shear zones often occur between undeformed layers of apparently similar strata.

The shear zones indicate a minimum displacement of between 0.5 and 1.5 km to the ENE of Zechstein and later strata over the Nordfjorden Block. Resultant folding and faulting over the Billefjorden Fault Zone represent an eastward manifestation of the Eocene West Spitsbergen Orogeny.

Type
Articles
Information
Geological Magazine , Volume 125 , Issue 2 , March 1988 , pp. 103 - 116
Copyright
Copyright © Cambridge University Press 1988

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