Permeability Changes Resulting from Quartz Precipitation and Dissolution around Upper Crustal Intrusions

Figure 5

Silica transport dynamics in a system with intermediate host rock permeability (10⁻¹⁵ m²), a shallow intrusion emplacement depth, and intermediate host rock porosity (0.05). The temporal evolution of the system is divided into (a) incipient, (b) main, and (c) waning stages. The initial boundary of the intrusion is shown in (a–c) with a dashed line. Quartz solubility, vertical fluid mass fluxes, and rates of quartz precipitation and silica dissolution close to the intrusion are shown in (d), (e), and (f), respectively. The color scheme is the same as in Figure 4 (above).