Open AccessStructural analysis of a fault in South-West Greenland
Author(s) -
N Henriksen
Publication year - 1960
Publication title -
bulletin
Language(s) - English
Resource type - Journals
eISSN - 2597-2936
pISSN - 0105-3507
DOI - 10.34194/bullggu.v26.6559
Subject(s) - sinistral and dextral , geology , displacement (psychology) , geodesy , fault (geology) , vertical displacement , wrench , normal fault , seismology , horizontal and vertical , period (music) , geomorphology , engineering , mechanical engineering , psychology , physics , acoustics , psychotherapist
Detailed analysis has shown the step-wise development of a WNW-ESE trending wrench fault, the Laksenæs fault, in the Ivigtut area of SW Greenland. The fault has a total horizontal displacement of 6 km, with sinistral movement, and a vertical displacement of approximately 2 km. The horizontal displacement can be shown to have taken place in three successive stages, each of which occurred in a different geological period. The first horizontal displacement of 1.5 km took place in the Ketilidian and/or early Kuánitic periods and was followed by a displacement of 1.5 km in the Sanerutian period and 3 km in the Gardar period. Vertical displacement took place only with the first two stages of horizontal displacement. The Laksenæs fault is cut by a system of NNW trending dykes which have been provisionally ascribed to the Tertiary.