Table 1. Representative reactions.
Carbonate reactions |
---|
Calcite/aragonite dissolution/precipitation: |
H2O + CO2 + CaCO3 = Ca2+ + 2HCO3- |
Dolomite dissolution/precipitation: |
2H2O + 2CO2 + CaMg(CO3)2 = Ca2+ + Mg2+ + 4HCO3- |
Organic remineralization (redox pathways) |
Suboxic diagenesis: |
Mn
and Fe reduction ![]() |
Sulfate reduction: |
(CH2O)106(NH3)16(H3PO4)
+ 53SO42-
![]() |
Silicate reactions |
Low-temperature decomposition (dissolution/hydrolysis) of basaltic basement: |
basaltic
glass, plagioclase, and olivine ![]() |
K-feldspar
![]() |
2KAlSi3O8
+ 2H+
+ 9H2O
![]() |
Kaolinite
![]() |
5Al2Si2O5(OH)4
+ 2K+
+ 2HCO3-
+ 4SiO2(aq)
![]() |
Kaolinite
![]() |
7Al2Si2O5(OH)4
+ 8SiO2(aq)
+ Mg2+
![]() |
Albite
![]() |
2.33NaAlSi3O8
+ 8.64H2O
+ 2CO2
![]() |