Late–/postglacial age and tectonic origin of the Nordmannvikdalen Fault, northern Norway

Lars Olsen,Odleiv Olesen,John Dehls,Georgios Tassis

doi:10.17850/njg98-3-09

Abstract

Late–/postglacial age and tectonic origin of the Nordmannvikdalen Fault, northern Norway

Highlights

Two postglacial faults have been suggested on mainland Norway
The N–S trending and NE–SW sections of the Ismunden Fault in Central Sweden have height/length ratios of 6 / 3500 = 0.0046 and 8 / 22,000 = 0.00036 (Berglund & Dahlström, 2015), respectively. These examples show that the height/length ratio of the Nordmannvikdalen Fault is high but not anomalous compared to other postglacial faults in northern Fennoscandia
We maintain that the structure should be classified as (A) ’Almost certainly neotectonics’ as proposed by Dehls et al (2000) and Olesen et al (2004, 2013)

Summary

Introduction

The NE–SW-oriented, reverse Stuoragurra Fault (Olesen, 1988; Muir-Wood, 1989; Olesen et al, 1992; Dehls et al, 2000) in western Finnmark and the NW–SE-oriented, normal Nordmannvikdalen Fault (Bakken, 1983; Sollid & Tolgensbakk, 1988; Tolgensbakk & Sollid, 1988; Dehls et al, 2000) constitute the Norwegian part of the postglacial Lapland Fault Province (Fig. 1). The Nordmannvikdalen Fault is located within the Reisa Nappe Complex in the Upper Allochthon of the Caledonian Orogen, and represents the only northern Fennoscandian postglacial fault outside the Precambrian Shield. 2018: Late–/postglacial age and tectonic origin of the Nordmannvikdalen Fault, northern Norway.

Methods

Results

Discussion

Conclusion