Table 1 Theoretical stoichiometries of weathering reactions and their DI14C fingerprints.

From: Sulphuric acid-mediated weathering on Taiwan buffers geological atmospheric carbon sinks

Mineral type

Weathering Pathway

HCO3

SO4

pMC

\(\frac{{\bf{Na}}}{{\boldsymbol{(}}{\bf{H}}{\bf{C}}{{\bf{O}}}_{{\bf{3}}}{\boldsymbol{+}}{\bf{S}}{{\bf{O}}}_{{\bf{4}}}{\boldsymbol{)}}}\)

\(\frac{{\bf{Ca}}}{{\boldsymbol{(}}{\bf{H}}{\bf{C}}{{\bf{O}}}_{{\bf{3}}}{\boldsymbol{+}}{\bf{S}}{{\bf{O}}}_{{\bf{4}}}{\boldsymbol{)}}}\)

\(\frac{{\bf{Mg}}}{{\boldsymbol{(}}{\bf{H}}{\bf{C}}{{\bf{O}}}_{{\bf{3}}}{\boldsymbol{+}}{\bf{S}}{{\bf{O}}}_{{\bf{4}}}{\boldsymbol{)}}}\)

Silicate

Carbonic acid

2

0

100

0.42

0.15

0.11

Sulphuric acid

0

1

Undef.

0.85

0.30

0.21

Carbonate

Carbonic acid

2

0

50

0.006

0.33

0.17

Sulphuric acid

1

0.5

0

0.007

0.44

0.22

  1. Bicarbonate and sulphate concentrations normalised to one silicate or carbonate mineral unit (Ca, Mg, 2Na, 2K)SiO3 or (Ca, Mg, 2Na, 2K)CO3 following Eqs (2–5). The theoretical average major anion molar concentration-normalised sodium, calcium, and magnesium concentrations are given for the different minerals types and their weathering pathways.
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