Laboratory measurement of seismic wave dispersion and attenuation at high pressure and temperature

摘要: Abstract At sufficiently high temperatures and in the presence of fluids, small-strain mechanical behaviour geological materials is inevitably frequency dependent. In order to understand nature viscoelastic relaxation manifest attenuation dispersion seismic waves, laboratory methods suited seismic-frequency interrogation are required. Torsional forced-oscillation related microcreep methods, providing for measurement shear modulus associated strain-energy dissipation under conditions pressure temperature independently controlled pore-fluid pressure, will be reviewed. Phenomenological approaches modelling high-temperature outlined. The application these experimental analytical illustrated by reference recent work on polycrystalline olivine.