TABLE 1

Chemical compositions of water samples from several individual seeps

SeepaConcn (mg liter−1) ofb:pHEC (μS/cm)
LiNaNH4KMgCaFClNO3SO4CO3HCO3
10.030 ± 0.0604.65 ± 0.348.18 ± 0.672.90 ± 0.6914.51 ± 0.5185.42 ± 5.940.39 ± 0.600.69 ± 0.0800.89 ± 0.0763.751,306.826.90627
20.005 ± 0.0168.90 ± 0.195.29 ± 0.498.58 ± 1.6114.41 ± 1.2394.52 ± 6.770.08 ± 0.030.53 ± 0.150.04 ± 0.120.20 ± 0.64006.81598
30.006 ± 0.0186.42 ± 0.287.17 ± 0.172.86 ± 0.7016.68 ± 0.7596.38 ± 1.430.07 ± 0.010.78 ± 0.130045.981,365.266.84618
40.005 ± 0.0174.89 ± 0.258.39 ± 0.823.18 ± 0.4716.76 ± 0.8791.55 ± 2.130.28 ± 0.660.99 ± 0.0800.39 ± 0.6257.481,352.516.91575
50.014 ± 0.0234.71 ± 0.186.94 ± 0.432.10 ± 0.4416.29 ± 1.1487.18 ± 16.160.08 ± 0.030.431 ± 0.00500.64 ± 0.0475.241,219.7026.82543
  • a Seeps 1 and 2 are the sampling sites indicated by black stars in Fig. 1. Seeps 3 to 5 were located at a distance of 100 to 300 m apart from seeps 1 and 2 and from each other.

  • b Concentrations of NO2, Br2+, and Mn2+ were below the detection limit (1 μg liter−1) in all the samples tested.