Fluid Chemistry of Mid-Ocean Ridge Hydrothermal Vents: A Comparison between Numerical Modeling and Vent Geochemical Data

<div>Plot of 10C<sub>K</sub>/(10C<sub>K</sub> + C<sub>Na</sub>) versus log 10C<sub>Mg</sub>/(10C<sub>Mg</sub> + C<sub>Ca</sub>) with Ci in mmol/kg, representing the simulated compositional evolution of seawater reacting with basaltic rocks at equilibrium for variable fluid/rock (F/R) mass ratios, temperatures of 50 to 400°C, and at a pressure of 500 bars. Black diamond represents the composition of seawater at 2°C and red diamond represents the isochemical dissolution of mid-ocean ridge basalt. The dashed red curve shows the evolution of the fluid composition from fluid-buffered to rock-buffered conditions at a temperature of 400°C.</div>

Geofluids

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Figure 6

Figure 6: Fluid Chemistry of Mid-Ocean Ridge Hydrothermal Vents: A Comparison between Numerical Modeling and Vent Geochemical Data 