Figure 4.73. AFM digrams for a range of pressure and temperatures with the option of showing mineral assemblages at each P and T for a few selected ideal KFMASH bulk compositions. Because there are many files, wait 30 seconds after you load this page for the files to download. Then move your mouse over the PT diagram on the left to see how the AFM topology changes. Click on the PT diagram to stop the animation at a particular temperature and pressure. Click the Animate button (upper right) to resume the animation.
Click on a bulk composition to show the mineral assemblage diagram (MAD), mineral assemblages, and modes for the selected bulk composition at each T and P. The bulk composition will appear as a small red dot on the AFM diagram. Again, you may click on the MAD (PT) diagram to stop the animation at a particular temperature and pressure. Click on the Toggle button to switch back and forth between the MAD diagram and the petrogenetic grid showing discontinuous KFMASH reactions. Click the Show Grid button (upper right) to remove the MAD diagram and modes. Water produced by dehydration reactions and lost from the rock is shown for the HighAl, X(Mg)=0.25 bulk composition in units of mole fraction of the total water lost and in units of volume fraction of water lost. SPaC (4/2000) KFMASH Grid, calculated AFM topologies, and software to calculate the MAD diagrams (Gibbs2) and modes (MADPlotter95) were provided by Frank Spear.
- Figure 4.73
