Indeed, at temperatures of 600 °C, it is possible to envisage heated infiltrating brines reacting with kimberlite, the formation of high-temperature melts of natrocarbonatite, and brine forming in pore spaces and then crystallizing out assemblages with igneous textures.
The greater concern says Kharaka, is that migrating CO2 might mix with brine, forming carbonic acid that could leach metals such as iron, zinc, or lead from the underlying rock.
Brines formed by the absorption of water by deliquescent minerals are thermodynamically equivalent to brines that are saturated with respect to the same deliquescent minerals.
Additionally, brines may form from the deliquescence of salts found in dusts deposited on the containers.[1] In this study we focus on seepage brines formed by the evaporation of pore water at elevated temperature.
More work is still needed to prove the current existence of liquid water, adds Spencer, because sodium-laced particles could be coming from brines formed billions of years ago and frozen ever since.
The range of brines formed by the deliquescence of hygroscopic salts found in dusts can be calculated from mixtures of the pure phases using equilibrium thermodynamics, because relative humidity is related to the activity of water and solution composition.
The important chemical divides that control the composition of brines formed from dilute sulfate type waters are halite, bassanite (or other calcium sulfates), magnesium silicate, amorphous silica, and possibly fluorite and brucite based on experimental results and model predictions.
Such systems consist of three different water types: the regional fresh groundwater, and low and high salinity brines forming the upper and lower water layers of the stratified water body, respectively.
The scientists think these brines form on a few nights per year when the relative humidity is very high and the temperature is very low; they lie beneath the surface in the top layer of soil and quickly dry out when the sun rises.
The formation of brines at Martian conditions was studied experimentally Bulk deliquescence from water vapor is too slow to occur diurnally on Mars Brines form in minutes when salts are placed in direct contact with ice Our view of Mars has changed dramatically in the past two decades, from an inhospitable cold desert to a potentially habitable planet.
