Mesonorm {GCDkit} | R Documentation |
Calculates eine bessere Mesonorm for granitoids of Mielke & Winkler (1979).
Mesonorm(WR, GUI = FALSE, precision = getOption("gcd.digits")) Streckeisen(x, new = TRUE)
WR |
a numerical matrix; the whole-rock data to be normalized. |
GUI |
logical, is the function called from the GUI? |
precision |
precision of the result. |
x |
Normative minerals calculated by the function |
new |
logical, is a new plotting window to be opened? |
This method of norm calculation should yield mineral proportions close to the actual mode of granitoid rocks. The calculated minerals are:
Orthoclase, Albite, Anorthite, Quartz, Apatite, Magnetite, Hematite, Ilmenite, Biotite, Amphibole, Calcite, Corundum, Rest
If desired, the function plots Q'-ANOR diagram of Streckeisen & Le Maitre (1979)
using the function Streckeisen
. The fields in this diagram are labeled
as follows:
2 | alkali feldspar granite |
3 | granite |
4 | granodiorite |
5 | tonalite |
6* | quartz alkali feldspar syenite |
7* | quartz syenite |
8* | quartz monzonite |
9* | quartz monzodiorite/quartz monzogabbro |
10* | quartz diorite/quartz gabbro |
6 | alkali feldspar syenite |
7 | syenite |
8 | monzonite |
9 | monzodiorite/monzogabbro |
10 | diorite/gabbro |
A numeric matrix 'results
'.
Vojtech Janousek, vojtech.janousek@geology.cz
& Vojtech Erban, vojtech.erban@geology.cz
Mielke P & Winkler H G F (1979) Eine bessere Berechnung der Mesonorm fuer granitische Gesteine. Neu Jb Mineral, Mh 471-480
Streckeisen, A. & Le Maitre, R. W. (1979) A chemical approximation to the modal QAPF classification of the igneous rocks. Neu Jb Mineral, Abh 136, 169-206.