On kink-zone development and metamorphic differentiation in the low-grade schists of Norwegian Sulitjelma.

• Main Author: Nicholson, Robin
• Format: Article in Journal/Newspaper
• Language: English
• Published: 1967
• Subjects: STRUKTURGEOLOGI; FYLLITT; OMDANNET BERGART; FOLDNING; Dewey; Fron; Furulund; Låmivatnet; Sulitjelma
• Online Access: https://hdl.handle.net/11250/2674856

The common minor scale kink-zones of upper levels of the Furulund schists of eastern Norwegian Sulitjelma generally do not occur in conjugate pairs: usually only the member with northwest dipping axial plane is developed although at lower levels rarely both conjugate pairs and single members occur. The kink-zones fit the simple shear mechanism of development proposed by Dewey and Roberts. The upper kink-zones are characterised by a well-developed metamorphic differentiation structure resulting fron the juxtaposition of zones alternately rich in mica and quartz. In many of the kink-zones the mica-rich zones are bent by smaller scale folds unknown elsewhere in the region but which are geometrically conjugate to the minor-scale structure in which they lie. Although they clearly are later than the kink-zones it is judged that they are directly related to them. 34908