Geology Reference
In-Depth Information
Table 12.1 Invariant points (roman numerals) and univariant curves, or reactions (arabic
numerals) in the system KAlSiO 4 - Mg 2 SiO 4 - H 2 O (After Luth 1967)
I.
Ph + Fo + Ok + Lc + L + V
V.
Ph + Or + Q + En + L + V
Fo + Lc + V = L b
1
24
Or + En + Q + V = L
2
Fo + Lc + Ok + V = L
25
Ph + Q = Or + En + V
3
Ph = Fo + Ok + Lc + V
26
Ph + Or + Q + V = L
Ph = Fo + Ok + L + V a
4
27
Ph + Q + V = En + L
Ph + Ok + V = Fo + L a
5
21
Ph + L = Or + En + V
Ph = Fo + L + V a
6
28
Ph + Q = Or + En + L
7
Ph + Ok + Lc + V = L
VI.
En + Pen + Lc + Fo + L + V
Ph + Lc + V = Fo + L b
8
Ph + Lc + Fo + V = L b
9
33
En = Pen
Ph + L = Fo + Lc + V b
10
22a
Lc + En + V = Fo + L
Ph + Lc + V = L b
11
22b
Lc + Pen + V = Fo + L
29
Ph + Lc = Fo + Ok + L
VII. En + Pen + Lc + Or + L + V
II.
Ph + Fo + Or + Lc + L + V
33
En = Pen
12
Or + Fo + V = Lc + L
23a
Or + En + V = Lc + L
13
Ph + Or = Fo + Lc + V
23b
Or + Pen + V = Lc + L
Or + Ph + V = Lc + L c
14
VIII. Q + Tr + Or + En + L + V
Or + Ph + Lc + V = L c
15
Or + Ph + V = L c
16
34
Q = Tr
17
Ph + L = Or + Fo + V
24a
Or + En + Q + V = L
10
Ph + L = Fo + Lc + V
24b
Or + En + Tr + V = L
31
Ph + Or = Lc + Fo + L
IX.
Ok + Ks + Ph + Lc + L + V
III.
Ph + Fo + En + Or + L + V
35
Ks = Ok
18
Or + En + V = Fo + L
7a
Ph + Ok + Lc + V = L
19
Ph + En = Or + Fo + V
7b
Ph + Ks + Lc + V = L
20
Ph + En = Fo + L + V
21
Ph + L = Or + En + V
17
Ph + L = Or + Fo + V
32
En + Or + Ph = Fo + L
IV.
Fo + Lc + Or + En + L + V
22
Lc + En + V = Fo + L
23
Or + En + V = Lc + L
12
Or + Fo + V = Lc + L
18
Or + En + V = Fo + L
30
Or + Fo = Lc + En
a Related by singular point on the univariant curve involving Ph, Fo, Ok, L, and V
b Related by singular points on the univariant curves involving Ph, Fo, Lc, L, and V
c Related by singular points on the univariant curves involving Ph, Or, Lc, and V
All reactions are written in such a way that the high temperature assemblages is on
the right side of the reaction symbol, except for reaction 10. See also List of Abreviations.
 
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