The Sveconorwegian structures of the Norwegian part of the Kongsberg-Bamble-Østfold segment

Abstract

The Kongsberg-Bamble-Østfold segment within the Sveconorwegian province is bounded by the Kristiansand-Bang shear zone and the Dalsland Boundary Thrust. The pre-Sveconorwegian basement rocks in this segment were involved in tectono-metamorphic reworking during the Sveconorwegian orogeny, which produced the main regional structures. These structures and opposite thrusting along the eastern and western margins of the segment suggest a large amount of Sveconorwegian crustal shortening in an E-W direction.

Key Words:

• Structure
• tectonics
• crustal shortening
• metamorphism
• amphibolite facies
• Sveconorwegian orogeny
• Kongsberg-Bamble-Østfold segment
• Kristiansand-Bang shear zone
• Dalsland Boundary Thrust
• Proterozoic
• southeastern Norway
• N5815 N6050 E1145 E0800