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Table 1 Chemistry of low temperature vent fluid sample from Franklin Seamount, Woodlark Basin. All data from Binns et al.5

From: Microbial and hydrothermal aspects of ferric oxyhydroxides and ferrosic hydroxides: the example of Franklin Seamount, Western Woodlark Basin, Papua New Guinea

  Vent fluid Ambient seawater
T/°C 20–30 2.1
pH 6.26 7.57
Alkalinity/u equiv l-1 3.08 2.86–2.91
Conc./mM kg-1   
Mg 51.96 52.66–52.99
Ca 10.47 9.85–9.87
Si 0.33 0.117–0.118
Li 0.036 0.026
Mn 0.010 2.5 × 10-6-4.5 × 10-6
Fe 0.038 4 × 10-6
Cl 532.9 530–531
H2S NDa ND
NO3 23.8 35.8–37.7
NO2 <0.1 ND
NH4 7.5 ND
PO4 0.78 2.6–2.9
Conc./μM kg-1   
Ni 0.014 0.006
Cu 0.78 0.012–0.046
Zn 0.38 ND
Conc./nM kg-1   
Ag 0.23 0.09–0.18
Pb 1.2 0.38–0.48
  1. aND, not determined.