ERS201H5 Lecture Notes - Lecture 8: Pascal (Unit), Microcline, Basalt
Document Summary
One component systems: depict the stability fields of different structural. Phase rule arrangements of minerals in a specific chemical system as a function of p and. Two component systems: constructed to display compositional variability in a system as a function of temperature. Mineral forming processes: precipitation from a fluid (like h2o) Hydrothermal processes t = 100-500 degrees celsius, p= 0 to 1000. Diagenesis- t = 0-200 degrees celsius, p = 1 atm 300 mpa (3kb) Evaporation - t = 10-40 degrees celsius, p = 1 atm. Weathering - t = 10 100 degrees celsius, p = 1 atm 10 mpa (0. 1kb) Biological activity - t = 10 40 degrees celsius, p = 1 atm 1 mpa: sublimation from a vapor (0. 01 kb) This process is somewhat more rare, but can take place at a volcanic vent, frost, or deep in space where the pressure is near vacuum.
