AFM diagram, any Label if the following mineral assemblage is stable in the ACF,

Question

AFM diagram, any Label if the following mineral assemblage is stable in the ACF, AKF, or combination of the three 3) or not stable on any of the diagrams. a. Quartz, Muscovite, Kyanite Staurolite, Chlorite Plagjocdlase, Quart, Muscovite, Biotite, Garnet, Staurolite b. C. Kyanite, Biotite, Quartz, Muscovite, staurolite d. Chlorite, Quartz, Kyanite, Muscovite, Garnet, Biotite e. Plagiocase, Kyanite, Quartz, Staurolite, Muscovite K yanite Kyanite Staurolite Staurolte Quartz Plagioclase Muscovite Quartz + Muscovite Plagioclase Garnet Garnet ? hlorite Chlorite Biotite Biotite K yanite Staurolte +Quartz +Muscovite Garnet X K-spar

Explanation / Answer

a. Stable in all the three diagram.

b. Stable in ACF, AKF but unstable in AFM diagram

c. Stable in all the three diagrams.

d. Stable in all the three.

e. Stable in ACF, AKF but unstable in AFM diagram.

Note: 1)To find out which mineral assemblage will be stable in which diagram you have to find if those minerals are plotted in that diagram or if that system measures the components of the respective mineral(s).

2) Plagioclase cannot be plotted in the AFM diagram as it do not consider the CaO while calculating for the three component system. So it is clearly pointed out as the unstable assemblage for AFM system.

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