Open AccessDykes and deformation in the Ikertoq zone of the Nagssugtoqidian at S0ndre Str0mfjord Airport, West Greenland
Author(s) -
I. van der Molen
Publication year - 1984
Publication title -
bulletin of the geological society of denmark
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.674
H-Index - 28
eISSN - 2245-7070
pISSN - 0011-6297
DOI - 10.37570/bgsd-1983-32-06
Subject(s) - gneiss , geology , intrusion , archean , traverse , deformation (meteorology) , metamorphic facies , geomorphology , facies , seismology , geochemistry , geodesy , metamorphic rock , oceanography , structural basin
The geology of the southern part of the Nagssugtoqidian of W Greenland is examined in a traverse of the amphibolite facies Ikertoq zone at S0ndre Str0mfjord Airport. The continuous fanning of the foliation, shallow· dips near the Archaean - Nagssugtoqidian boundary and steeper dips further north, is not indicative of a two-stage history for the zone. The structures of the deformed Kangamiut dykes and the gneisses in which they occur have been studied in some detail. It is concluded that deformation synchronous with and postdating the intrusion of the dykes has been intense enough to rejuvenate the fabric of the gneisses to a post-intrusive age.