Fig. 4
From: Modeling fracture cementation processes in calcite limestone: a phase-field study
a Computational domain with an initial crack width of \(100 \Delta x\). Simulated bitaxial crystal growth for different values of crack opening rates: b Slow crack opening rate \(\Delta x / 1000 \Delta t\), c moderate crack opening rate \(\Delta x / 200 \Delta t,\) and d fast crack opening rate \(\Delta x / 100 \Delta t\). The progression is shown at representative simulation time steps. The selected crystals in the resulting vein morphologies are illustrated. e Fibers with almost equal width. f Elongate-blocky crystals with increasing width. g Crystals forming euhedral flat facets due to availability of sufficient pore space for crystal growth