Fo

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(No Transcript)
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1. Cool liquid X to liquidus
P 1 atm
En begins to crystallize
2. Liquid changes composition as En is removed
liquid cools to eutectic, E silica crystallizes.
Liquid
Temperature
3. Temperature remains constant until liquid is
completely crystallized
X
4. Crystalline En silica cool
P
Forsterite Liquid
E
Enstatite Liquid
Forsterite Enstatite
Enstatite Silica
Fo
En
SiO2
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1. Cool Y to liquidus
Fo crystallizes
P 1 atm
2. Removal of Fo causes L to change composition
Y
Liquid
3. L reaches peritectic, P Fo reacts with L to
form En
Temperature
4. Fo is consumed in reaction
5. En crystallizes as L moves to eutectic
composition, E
Forsterite Liquid
P
E
6. En silica crystallize at eutectic until L is
consumed
Enstatite Liquid
7. Crystalline En silica cool
Forsterite Enstatite
Enstatite Silica
Fo
En
SiO2
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Z
1. Cool Z to liquidus
P 1 atm
Fo crystallizes
Liquid
2. Removal of Fo causes L to change composition
Temperature
3. L reaches peritectic, P Fo reacts with L to
form En
Forsterite Liquid
P
E
4. L is consumed in reaction
Enstatite Liquid
5. Fo En cool
Forsterite Enstatite
Enstatite Silica
Fo
En
SiO2