Table 1 Examples of common water-rock reactions that impact the chemistry of groundwater

From: Large-scale groundwater flow and sedimentary diagenesis in continental shelves influence marine chemical budgets

Reaction

Formula

Dolomitization

2CaCO3 + Mg2+ → CaMg(CO3)2 + Ca2+

Albitization

CaAl2Si2O8 + 4SiO2 + 2Na+ → 2NaAlSi3O8 + Ca2+

Illitizationa

Smectite + K+ → Illite + SiO2 + Na+ + Ca2+ + Fe2+ + Mg2+ + OH− + nH2O

  1. aEquation is not balanced because the stoichiometric coefficients for all constituents depend on highly variable compositions of smectite and illite.
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