Inverse modeling to obtain alteration mineralogy using geothermal fluid data

[Franco Galarce]

I need to obtain alteration mineralogy of a geothermal system in thermodynamic equilibrium, using geothermal fluid data including temperature, pH, aqueous species, and gaseous species. These are various samples taken from wells.

I don't know very well how to input data from several samples, without assuming the last one as a consequence of the previous ones, without more data than that.

I'm using the third version for Windows.

[dlparkhurst]

You need to have some confidence that one water composition evolved from another. Real world data often is inconsistent, say TDS goes up, but Cl goes down. Given a scattershot of data, it can be hard to establish a consistent trend.

Perhaps you could consider each sample individually, assuming that the sample evolved from rain (pure water) or some common background water.