We use a percolation analysis to study the conductivity of a random resistor network with bond conductances gi = g0 exp(λxi), where xi is a random variable. In the limit λ → ∞ we may write the network conductivity as σ = ca2−dgcλ−y where a is the lattice constant, y a critical...

In the MHz-GHz range, geometrical effects associated with platy grains [e.g. clay particles in sandstones] are important in determining the complex dielectric function, ϵ(ω), of rocks. Calculations based on the coated grain consolidation model, in which the platy grains are confined to a thin...