Examples of the simulation results

Two dimensional 2kmx2km isotropic porous section was divided into 20x20 squares, and top, bottom, left, and right boundaries were insulated. Left, right, and bottom boundaries were impermeable. Top layer was open to 10C pure water pressured at 1 bar. Rock porosity is 5% and contains quartz. The other part is inert. Rock reaction surface area is 1.0 m2/m3. Heat source, maximum 350C at left corner, was set in a bottom layer and heat sink equivalent for radiative-conductive cooling at the surface was set in a top layer. 10C pure water was filled in the rock at the initial state. There are movie files of the simulation results with varying permeability as shown below (QuickTime 4.0 required). You can see evolution of quartz dissolution (yellow), quartz precipitation (blue), cristobalite precipitation (greenish yellow), and amorphous silica precipitation (red, not exist in experiment 2s-1) in the movies. Details of the simulation are described in Takeno et al. (1998). (^ means power function)

Number	QuickTime	Avi	permeability	reaction surface area
2s-4	[qtm 1.4MB]	[avi 1.4MB]	5.0x10^(-15) m2	1.0 m2/m3
2s-2	[qtm 1.3MB]	[avi 1.3MB]	1.0x10^(-15) m2	1.0 m2/m3
2s-1	[qtm 1.2MB]	[avi 1.2MB]	5.0x10^(-16) m2	1.0 m2/m3