KAlSi2O6_SiO2

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1800
1600
1400
1200
1000
800
20 40 60 80 100
T
Wt% SiO2
SiO2
KAlSi O2 6
Leu
K-feldspar
KAlSi O3 8
melt
leucite
+ melt
tridymite
+ melt
K-spar
+meltleucite
+ K-spar
K-spar + tridymite
K-spar + quartz
P
E
eutectic
peritectic
leucite
quartz
tridymite
cristobalite
+ melt
KAlSi O - SiO2 6 2
1800
1600
1400
1200
1000
800
leucite
+ melt
tridymite
+ melt
K-spar
+meltleucite
+ K-spar
K-spar + tridymite
K-spar + quartz
P
E
cristobalite
+ melt
1750
T C
o
melt composition
70% leu - 30% SiO2
70% KAlSi O - 30% SiO2 6 2
melt
100% melt
0% leucite
0% K-feldspar
0% cristobalite
0% tridymite
0% quartz
40200 60 100
Wt % SiO2KAlSi O
Leu
2 6
K-feldspar
KAlSi O3 8
leucite
quartz
tridymite
80
1800
1600
1700
1400
1200
1000
800
T C
o
leucite
+ melt
tridymite
+ melt
K-spar
+meltleucite
+ K-spar
K-spar + tridymite
K-spar + quartz
cristobalite
+ melt
melt
melt composition
70% leu - 30% SiO2
100% melt
0% leucite
0% K-feldspar
0% cristobalite
0% tridymite
0% quartz
70% KAlSi O - 30% SiO2 6 2
40200 60 100
Wt % SiO2KAlSi O
Leu
2 6
K-feldspar
KAlSi O3 8
leucite
quartz
tridymite
80
1800
1600
1400
1200
1000
800
T C
o
leucite
+ melt
tridymite
+ melt
K-spar
+meltleucite
+ K-spar
K-spar + tridymite
K-spar + quartz
cristobalite
+ melt
melt composition
70% leu - 30% SiO2
100% melt
0% leucite
0% K-feldspar
0% cristobalite
0% tridymite
0% quartz
melt
70% KAlSi O - 30% SiO2 6 2
40200 60 100
Wt % SiO2KAlSi O
Leu
2 6
K-feldspar
KAlSi O3 8
leucite
quartz
tridymite
80
1800
1600
1400
1490
1200
1000
800
T C
o
leucite
+ melt
tridymite
+ melt
K-spar
+meltleucite
+ K-spar
K-spar + tridymite
K-spar + quartz
cristobalite
+ melt
melt
99% melt
0% K-feldspar
0% cristobalite
0% tridymite
0% quartz
1% leucite
melt composition
69% leu - 31% SiO2
70% KAlSi O - 30% SiO2 6 2
40200 60 100
Wt % SiO2KAlSi O
Leu
2 6
K-feldspar
KAlSi O3 8
leucite
quartz
tridymite
80
1800
1600
1400
1200
1000
800
T C
o
leucite
+ melt
tridymite
+ melt
K-spar
+meltleucite
+ K-spar
K-spar + tridymite
K-spar + quartz
cristobalite
+ melt
melt
83% melt
0% K-feldspar
0% cristobalite
0% tridymite
0% quartz
17% leucite
melt composition
64% leu - 36% SiO2
70% KAlSi O - 30% SiO2 6 2
40200 60 100
Wt % SiO2KAlSi O
Leu
2 6
K-feldspar
KAlSi O3 8
leucite
quartz
tridymite
80
1800
1600
1400
1200
1300
1000
800
T C
o
leucite
+ melt
tridymite
+ melt
K-spar
+meltleucite
+ K-spar
K-spar + tridymite
K-spar + quartz
cristobalite
+ melt
75% melt
0% K-feldspar
0% cristobalite
0% tridymite
0% quartz
25% leucite
melt
melt composition
60% leu - 40% SiO2
70% KAlSi O - 30% SiO2 6 2
40200 60 100
Wt % SiO2KAlSi O
Leu
2 6
K-feldspar
KAlSi O3 8
leucite
quartz
tridymite
80
1800
1600
1400
1200
1000
800
T C
o
leucite
+ melt
tridymite
+ melt
K-spar
+meltleucite
+ K-spar
K-spar + tridymite
K-spar + quartz
cristobalite
+ melt
melt
68% melt
0% K-feldspar
0% cristobalite
0% tridymite
0% quartz
32% leucite
melt composition
56% leu - 44% SiO2
70% KAlSi O - 30% SiO2 6 2
40200 60 100
Wt % SiO2KAlSi O
Leu
2 6
K-feldspar
KAlSi O3 8
leucite
quartz
tridymite
80
1800
1600
1400
1200
1149
1000
800
T C
o
leucite
+ melt
tridymite
+ melt
K-spar
+meltleucite
+ K-spar
K-spar + tridymite
K-spar + quartz
cristobalite
+ melt
melt
melt
leucite
K-feldspar
melt composition
55% leu - 45% SiO2
70% KAlSi O - 30% SiO2 6 2
40200 60 100
Wt % SiO2KAlSi O
Leu
2 6
K-feldspar
KAlSi O3 8
leucite
quartz
tridymite
80
1800
1600
1400
1200
1100
1000
800
T C
o
leucite
+ melt
tridymite
+ melt
K-spar
+meltleucite
+ K-spar
K-spar + tridymite
K-spar + quartz
cristobalite
+ melt
melt
30% melt
0% leucite
0% cristobalite
0% tridymite
0% quartz
70% K-feldspar
melt composition
51% leu - 49% SiO2
70% KAlSi O - 30% SiO2 6 2
40200 60 100
Wt % SiO2KAlSi O
Leu
2 6
K-feldspar
KAlSi O3 8
leucite
quartz
tridymite
80
1800
1600
1400
1200
1000
800
T C
o
leucite
+ melt
tridymite
+ melt
K-spar
+meltleucite
+ K-spar
K-spar + tridymite
K-spar + quartz
cristobalite
+ melt
melt
25% melt
0% leucite
0% cristobalite
0% tridymite
0% quartz
75% K-feldspar
melt composition
46% leu - 54% SiO2
70% KAlSi O - 30% SiO2 6 2
40200 60 100
Wt % SiO2KAlSi O
Leu
2 6
K-feldspar
KAlSi O3 8
leucite
quartz
tridymite
80
1800
1600
1400
1200
1000
800
900
T C
o
leucite
+ melt
tridymite
+ melt
K-spar
+meltleucite
+ K-spar
K-spar + tridymite
K-spar + quartz
cristobalite
+ melt
melt gone
melt
0% melt
0% leucite
0% cristobalite
0% quartz
90% K-feldspar
10% tridymite
70% KAlSi O - 30% SiO2 6 2
40200 60 100
Wt % SiO2KAlSi O
Leu
2 6
K-feldspar
KAlSi O3 8
leucite
quartz
tridymite
80
1800
1600
1400
1200
1000
800
T C
o
leucite
+ melt
tridymite
+ melt
K-spar
+meltleucite
+ K-spar
K-spar + tridymite
K-spar + quartz
cristobalite
+ melt
melt gone
0% melt
0% leucite
0% cristobalite
0% tridymite
90% K-feldspar
10% quartz10% quartz
melt
70% KAlSi O - 30% SiO2 6 2
40200 60 100
Wt % SiO2KAlSi O
Leu
2 6
K-feldspar
KAlSi O3 8
leucite
quartz
tridymite
80
	00-LeuQzB.eps
	01-LeuQzB1750.eps
	02-LeuQzB1700.eps
	04-LeuQzB1600.eps
	05-LeuQzB1490.eps
	06-LeuQzB1400.eps
	07-LeuQzB1300.eps
	08-LeuQzB1200.eps
	09-LeuQzB1149.eps
	10-LeuQzB1100.eps
	11-LeuQzB1000.eps
	12-LeuQzB0900.eps
	13-LeuQzB0800.eps