Palaeomagnetic dating of fault rocks from Vesterålen, Senja and Troms. Preliminary data

• Main Authors: Torsvik, Trond H., Olesen, Odleiv
• Format: Report
• Language: English
• Published: 1993
• Subjects: DATERING; FORKASTNING; PALEOMAGNETISME; PERM; Lofoten; Norway; Senja; Vesterålen; Kvaløya; Troms
• Online Access: https://hdl.handle.net/11250/2666409

A preliminary palaeomagnetic study has been carried out in Vesterålen, Senja and Kvaløya (Troms) in order to furnish temporal constraints on near offshore fault-activity in the Lofoten area. At Senja, two phases of faulting and brecciation have been identified. A young phase, attendant of the formation of fault-gouges, is Rcent\/Tertiary in origin, whereas an older phase has a Permian age. A Permian age (c. 260-270 Ma) is also indicated from heamatite cemented fault-breccias from Kvaløya, and the Permian fault-activity probably witnesses an early rift-phase on the continental margin. Permian fault-rocks (c. 260-270 Ma) are also widespread within the Møre-Trøndelag Fault Zone (Central Norway) and Western Norway. 32778