Fault inversion contributes to ground deformation above inflating igneous sills

Magma emplacement is commonly accommodated by uplift of the overburden and free surface. By assuming this deformation purely elastic, we can invert shape kinematics ground to model geometry dynamics underlying intrusions. However, magma be viscoelastic and/or inelastic processes. We use 3D seismic reflection data reconstruct how elastic bending processes a Late Jurassic sill offshore NW Australia. restore syn-emplacement compare its relief thickness, showing that: (i) where they are equal, intrusion; but (ii) thickness greater, inversion pre-existing fault compaction contributed accommodation. Our results support work suppress deformation, demonstrate magmatism modify displacements. Reflection seismology thus powerful tool for unravelling links between emplacement, faulting.