Mechanisms controlling the localisation of fault?controlled hydrothermal dolomitisation, Derbyshire Platform, <scp>UK</scp>

The Derbyshire Platform is a Mississippian aged flat-topped, steep sided platform that forms the westernmost expression of Derbyshire-East Midlands Platform. On south-east margin, 60 km2 Visean limestone has been dolomitised, forming two distinct bodies. One these bodies along major NW–SE trending basement fault and smaller, associated, N–S faults fractures. This study uses outcrop, petrographic geochemical analysis to better constrain timing mechanism for this fault-controlled dolomitisation. Field relationships demonstrate dolomitisation was multi-phase initiated after main phase matrix pore-occluding calcite cementation on terminated prior mineralisation. Fluids are interpreted have fluxed from adjacent basins, primarily strike-slip crustal were reactivated during basin inversion at onset Variscan Orogeny. Fluid supply episodic progressively confined fractures as porosity became occluded. demonstrates complex interplay between kinematics, host rock permeability fluid through seismic valving connect carbonate compartments. ultimately controlled position dolomite geobodies provides record flow transition thermal subsidence post-rift inversion. findings implications exploration both minerals hydrocarbon within dolomitised rocks can inform studies transfer reaction platforms burial realm.