Descriptive Mineralogy Native Elements: Pure elements that occur as minerals.
Other classifications. Modal mineralogy Major elements Normative compositions Cationic proportions...
18
Other Other classificatio classificatio ns ns
-
Upload
elias-bradstreet -
Category
Documents
-
view
219 -
download
0
Transcript of Other classifications. Modal mineralogy Major elements Normative compositions Cationic proportions...
• Modal mineralogy
• Major elements
• Normative compositions
• Cationic proportions
• Trace elements
Shand, 1943. A/CNK vs. A/NK
Classification based on cationic proportions
Metaluminous Peraluminous
Peralkaline
0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
01
23
45
67
A/CNK
A/N
K
Batchelor-Bowden interpretation of de la Roche’s diagram
Classification based on cationic proportions
MantleFractionates
Pre-plateCollisionPost-
collisionUplift
Late-orogenic
AnorogenicSyn-collision
Post-orogenic
-1000 0 1000 2000 3000 4000
01000
2000
3000
4000
R1= 4Si - 11(Na + K) - 2(Fe + Ti)
R2=
6C
a +
2M
g +
Al
OrAb
AnSp
Bt
Ph
En
Fs
Di
Fo
Fa
Hd
Ha