The stability of silicate minerals depends on the concentrations of H4.pdf

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The stability of silicate minerals depends on the concentrations of H 4 SiO 4 and H + . Hydrogen concentration is usually inversely related to the concentrations of K + , Na + , Ca 2 + or Mg 2 + . The inverse relationship between any of those cations M allows plotting both concentrations in a single axis (e.g., M / H + ). Table 2 shows solute concentrations in water from different soils and weathering environments associated with granite. Plot the data in Table 2 in the stability diagram below. What type of secondary minerals would you expect as a function of climate and water movement in fissures in granite? Does your prediction match the global distributions of precipitation - evapotranspiration and clay types shown in the next page? How could plants alter that distribution? Sample 1 is from stagnant water in bedrock. The rest of the samples are from spring water. P-E is precipitation evapotranspiration..

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