Palaeomagnetic evidence for large-scale dextral movement along the Trollfjord-Komagelv Fault, Finnmark, north Norway

Details Palaeomagnetic evidence for large-scale dextral movement along the Trollfjord-Komagelv Fault, Finnmark, north Norway Palaeomagnetic evidence for large-scale dextral movement along the Trollfjord-Komagelv Fault, Finnmark, north Norway

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978pepi...16..132k&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 16, Issue 2, p. 132-144.

Physics

8

Scientific paper

Palaeomagnetic data from Late Precambrian dykes from the northern part of Varanger peninsula, north Norway, suggest a two-axis magnetization structure. The dominant component is considered to be syn- to late-tectonic and probably acquired at around 640 m.y. B.P. Superposed on this magnetization is a minor component which is compatible with the relative Lower-Middle Palaeozoic field; i.e. it was most likely imposed during the climax of the Caledonian orogenic movements in north Norway. The estimated relative Late Precambrian palaeopole cannot easily be reconciled with the European Late Precambrian polar path. This disagreement can be accounted for by assuming a post-magnetization dextral megashear, of the order of 500-1000 km, along the Trollfjord-Komagelv fracture zone. This type of displacement is in line with geological evidence and the palaeomagnetic reconstruction supports the long-held view of there having been continuity between the depositional environments of the Varanger Peninsula Barents Sea Group, the Eleonore Bay Group of east Greenland and the Hecla Hoek Formation of east Spitsbergen. The character and age of the horizontal displacement, post-640 to pre-500 m.y. B.P., is seen in conjunction with the opening up of the lapetus Ocean and reactivation of ancient deep-seated fractures during both the spreading and the contraction phases of ocean development.

Affiliated with

Also associated with

No associations

Rating

Palaeomagnetic evidence for large-scale dextral movement along the Trollfjord-Komagelv Fault, Finnmark, north Norway does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Palaeomagnetic evidence for large-scale dextral movement along the Trollfjord-Komagelv Fault, Finnmark, north Norway, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Palaeomagnetic evidence for large-scale dextral movement along the Trollfjord-Komagelv Fault, Finnmark, north Norway will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1082912