Research Article
Supercritical Fluid Geochemistry in Geothermal Systems
Table 5
Comparison of measured and modeled geothermal fluids at Krafla. Concentrations are in ppm.
| | Subcritical fluid | Supercritical fluid | | Experimenta | Kraflab | Experiment w37a | Experiment w17a | IDDP-1c | Modelc |
| (°C) | 260 | 295 | 420 | 400 | 440 | | SiO2 | | 659 | | | 6.0 | 3.2 | B | | 1.23 | | | 1.41 | 1.39 | Na | | 178 | | | 0.51 | 168 | K | | 40.9 | | | 0.12 | 31.8 | Ca | | 1.18 | | | 0.16 | 0.0002 | Mg | | 0.001 | | | 0.024 | 0.000001 | Fe | | 0.036 | | | 5.25 | 0.004 | Al | | 1.27 | | | 0.054 | 0.001 | Cl | | 112 | | | 105 | 109 | CO2 | | 858 | | | 1637 | 1628 | SO4 | | 127 | | | 32.7 | 4.13 | H2S | | 266 | | | 630 | 395 |
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aAn average from the experimental runs (Table 3). bFrom Kaasalainen and Stefánsson [ 64]. cFrom Heřmanská et al. [ 31]. |