Fig. 3From: Mineral precipitation-induced porosity reduction and its effect on transport parameters in diffusion-controlled porous mediaSEM back scattering (BS) images of the sand grains (dark grey values) and celestite aggregate grains (light grey values) in the precipitation zone, before (left and middle), and after (right) selective celestite dissolution (see text for details). In the latter case no celestite can be detected.Back to article page