Numerical Modeling of Reactive Transport and Self-Sealing Processes in the Fault-Controlled Geothermal System of the Guide Basin, China
Table 3
Summary of primary and secondary minerals considered in the numerical simulation and their initial volume fractions, kinetic constants (), activation energies (), and specific reactive areas.
Mineral
Chemical formula
Volume fraction (vol.%)
(mol m-2 s-1)
(kJ/mol)
Specific reactive area (cm2/g)
Primary minerals
Quartz
SiO2
0.24
1.0 - 14
87.70
9.8
Albite
NaAlSi3O8
0.30
2.8 - 13
69.80
9.8
K-feldspar
KAlSi3O8
0.30
3.9 - 13
38.00
9.8
Calcite
CaCO3
0.04
Equilibrium
—
—
Muscovite
KAl2(AlSi3O10)(OH)2
0.12
2.8 - 14
22.00
9.8
Secondary minerals
Illite
K0.6Mg0.25Al1.8(Al0.5Si3.5O10)(OH)2
0
1.7 - 13
35.00
151.6
Chlorite
Mg2.5Fe2.5Al2Si3O10(OH)8
0
3.0 - 13
88.00
9.8
Ca-smectite
Ca0.145Mg0.26Al1.77Si3.97O10(OH)2
0
1.7 - 13
35.00
151.6
Dolomite
CaMg(CO3)2
0
3.0 - 8
52.20
9.8
Kaolinite
Al2Si2O5(OH)4
0
6.9 - 14
22.20
151.6
Equilibrium: aqueous solution was forced to be at equilibrium with respect to the corresponding minerals as long as these are present or supersaturated () within a specific grid block.
