Table 1 Estimated solution compositions of pore water that finally interacted with sediments at John Klein and Cumberland for (a) full-interaction scenario and (b) no-interaction scenario

Na (mol/kg)

0.085–0.24

0.094–0.12

0.038–0.42

0.033–0.13

K (mol/kg)

0.0025–0.018

0.0014–0.0044

0.0011–0.030

0.00047–0.0044

Mg (mol/kg)

0.0046–0.11

0.035–0.060

0.00064–0.21

0.0034–0.065

Ca (mol/kg)

0.022–0.12

0.024–0.045

<0.119

<0.048

Cl (mol/kg)

0.072–0.59

0.11–0.25

0.05–1.3

0.05–0.34

SO₄ (mol/kg)

0.025–0.14

0.044–0.072

N/A

N/A

ΣCO₂ (mol/kg)

0.0019–0.041

0.0023–0.016

N/A

N/A

Fe(II) (mol/kg)

0.00024–0.038

0.00012–0.0058

0.00044–0.19

0.00011–0.013

pH

6.7–7.3

6.9–7.3

6.5–8.3

6.8–8.1

\(P_{{\rm{CO}}_{2}}\) (mbar)

6–130

6–40

N/A

N/A