Orogenic paleofluid flow recorded by discordant detrital zircons in the Caledonian foreland basin of northern Greenland

Neoproterozoic to Paleozoic geology of northern Greenland with sample localities indicated, adapted from Higgins et al. (1991). The fluid front is recognized in the study area between samples 255628 and 303569; this is ∼120–190 km west of the known limit for Caledonian thrusting (e.g., Gee et al., 2008). The location of the fluid front is drawn using the more conservative, minimum distance of ∼130 km. The fluid front should be of regional extent and is therefore extrapolated parallel to the orogen further south (dashed line).