A multidisciplinary research into the Caledonian structural development of the Oslo basin, with focus on the calcite veins of the Fornebu and Bygdøy sections
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Field data shows deformation style matching the structural model of (Bruton et al. 2010), but there is a contrasting deformation style between the two section. The Fornebu section is marked by large scale folds, and a major fault, while the Bygdøy section is best described as a foldtrain, with smaller scale folds. This contrasting style can be best explained trough a higher Fluid pressure at Fornebu compared to Bygdøy, creating more (layer parallel) veins. These layer parallel veins act as slip surfaces, which combined with a higher id pressure allow for the easier formation of larger scale folds. Other factors that might have played a role are lithlogical differences and structural level. The analogue modeling results show that layer-parallel slip and lithlogical differences indeed play an important role in controlling deformation style and in general support the multiple structural level hypothesis as proposed by (Bruton et al. 2010).