Abstract

The force of crystallization is of renewed interest as a diagenetic replacement mechanism. We present a quantitative reaction-transport model for mineral replacement driven by the pressure exerted by crystal growth, based on continuum equations accounting for conservation of mass and momentum. A condition of volume-for-volume replacement during growth and dissolution is shown to arise naturally from the interaction of mechanical and reactive deformation. When applied to the postnucleation growth of quartz in a calcite plus amorphous silica host, a centimetre-scale concretion-like feature is shown from our simulations to arise within roughly 17 ka.

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