Figure 4.

Modelled energy availability from 10 redox processes (see Table 3) as a function of temperature and SW:HF mixing ratios at the SMVF and the LCVF. Second axis indicates the energy released when reactants in a mixture of SW and 1 kg hydrothermal fluid react until equilibrium is reached. Numbers in the legend refer to numbered redox reations in Table 3. For clarity, energies from redox reactions with nitrate as the electron acceptor are indicated with dashed lines. Note that different redox processes are considered independently.