Deformation of Anhydrite–gypsum rocks in central Spitsbergen

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 strat...

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Bibliographic Details
Published in:Geological Magazine
Main Authors: Harland, W. B., Mann, A., Townsend, C.
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 1988
Subjects:
Geology
Billefjorden
Spitsbergen
Online Access:http://dx.doi.org/10.1017/s0016756800009511
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756800009511
Description
Summary: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.

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