Physical properties of oceanic lower-crustal and upermost-mantle rocks from the Atlantis Massif, Mid-Atlantic Ridge

Four gabbroic and four highly serpentinised peridotite samples were acquired during the IODP expeditions 304-305 at the Central Dome and expedition 357 at the Southern Wall of the Atlantis Massif, respectively. Physical properties of the rock samples, including ultra-sonic P- and S-wave velocities and attenuations, electrical resistivity and permeability, were measured under increasing and decreasing pressure conditions (up to 50 MPa, ~ 2 km depth) using the experimental rig of the rock physics laboratory of National Oceanography Centre, Southampton, UK. The density and porosity of the samples were estimated using wet/dry weight difference of the rocks.