Sketch of a possible lineament pattern in Northwest Europe

Abstract

Regional linear fracture zones, or "lineaments", are known to be elements of fundamental importance in the structure of the Variscan (Hercynian) and older basement in NW Europe. Several lineaments have shown periodic tectonic activity until very recent times; movements in different directions at different times are common. Based on data from various sources - especially aeromagnetics and Landsat images the existence of several lineaments in the North Sea area is postulated. The known and the postulated lineaments can be loosely grouped into three recognisable, but not sharply defined, directional sets: around NW-SE, NE-SW, N-S. The effect of the lineaments on the structure of the Permian and younger cover is well expressed in the segmentation of the Mesozoic-Tertiary graben systems, in particular the Central Graben-Viking Graben.