Figure 8.04. CaMgSi2O6-Mg2SiO4-CaAl2Si2O8 Liquidus Diagram. Equilibrium liquidus surfaces are shown for the minerals Diopside (Di), Forsterite (Fo), and Anorthite (An) at 0.1 MPa pressure based on data from Osborn and Tait (1952). Temperature is in degrees Celcius and composition is in weight pecent.
To follow the crystallization of a liquid, click on the "Show Phase %" button. The cursor should have a black dot beneath it. Move the cursor over the liquidus surface and click. The black dot should be "dropped" on the liquidus surface, selecting a bulk composition. Click on the "changeT" button and then lower the temperature with the slider. The diagram will change to show isothermal sections that give the equilibrium assemblages for the slider-selected T. Furthermore, the "Phase Proportions" label will show the specific phase assemblage for the chosen bulk composition (the black/white dot), including the weight percent proportions of the equlibrium phases.
