Variations of the mean susceptibility of rocks under hydrostatic and non-hydrostatic pressure

摘要: Abstract The variations of the mean susceptibility basaltic rocks and polycrystalline magnetite, measured in weak magnetic field, under external non-hydrostatic (uniaxial) hydrostatic pressure, are studied. A decrease with increasing pressure was observed both cases, changes uniaxial stress being systematically much larger than those pressure. These reversible respect to application stress. is related qualitatively different behaviour directional susceptibilities orientations applied magnitude actual depends on ratio sensitivity constants various susceptibilities. Small may be result inhomogeneity internal stresses acting ferrimagnetic minerals as a anisotropy transmitting properties non-magnetic matrix.