Petrology Chapter 4Gautam Sen

Ternary Diagram

Equilibrium Crystallization

Equilibrium Melting

Fractional Crystallization

Fractional Melting

Di-An-Fo “System”

Di-An-Ab at 1 atm

Di-An-Ab: Equilibrium Crystallization

Equilibrium Crystallization - 2

Di-Fo-SiO2 “system” at 1 atm

Di-Fo-An-SiO2Tetrahedron

Di-Fo-SiO2: Equil. Crystall.

EquilibriumCrystallization

FractionalCrystallization

Equilibrium melting

FractionalMelting

An-Fo-SiO2

Di-Fo-SiO2at low tohigh pressures

3-phase triangle

Di-Fo-SiO2under 2 GPaPH2O

Carbonated lherzolite melting

CMS-CO2 @ 2 and 3 GPa

2 GPa

3 GPa

Changing melt composition from solidus to liquidus of a haploperidotite