The nature and origin of bed-parallel slip in Kardia Mine, Ptolemais Basin, Greece

摘要

Normal faulting in Kardia Lignite Mine within the Pliocene-Quaternary Ptolemais Basin, Northern Greece, was associated with broadly contemporaneous top to the north bed-parallel slip arising from hangingwall rollover on a km-scale displacement normal fault outside the mine. The direction of bed-parallel slip is perpendicular to the strike of minor normal faults ( 50 m displacement), which therefore provide markers for measuring the magnitude of bed-parallel slip. Associated slip data measured during 6 years of mine extraction provide constraints on the nature and kinematics of slip distributions over bed-parallel slip-surfaces, a generic issue which has previously not been possible to analyse for other extensional fault systems.