Whalen {GCDkit} | R Documentation |
Set of discrimination plots to distinguish A-type granitoids as defined by Whalen et al.(1987).
Whalen(plot.txt = getOption("gcd.plot.text"))
plot.txt |
logical, annotate fields by their names? |
Set of binary plots proposed by Whalen et al.(1987) to distinguish A-type granitoids on the one hand from ordinary/fractionated I- and S-types on the other.
In total 12 diagrams are plotted split into two pages. Apart from fields for
I and S type granites ('I & S
'), sometimes split into ordinary ('OGT
')
and fractionated (''FG'
')domains, average composition of the A type granites
(labeled 'A
') are shown. See Figs 1, 2 and 5 in the original paper
(Whalen et al.1987) for comparison.
The following diagrams are plotted: Zr+Nb+Ce+Y vs. FeOt/MgO and (K2O+Na2O)/CaO; 10000Ga/Al vs. K2O+Na2O, (K2O+Na2O)/CaO, K2O/MgO and FeOt/MgO; 10000Ga/Al vs. Zr, Nb, Ce, Y, Zn and Agpaitic Index.
To the matrix 'WR
' are appended two columns, with Ga/Al ratios and
values of the Agpaitic Index (labeled 'A.I.').
This function uses the plates concept. The individual plots can be selected and their
properties/appearance changed as if they were stand alone Figaro-compatible plots.
See Plate
, Plate editing
and
figaro
for details.
Vojtech Janousek, vojtech.janousek@geology.cz
Whalen J B, Currie K L, Chappell B W (1987) A-type granites: geochemical characteristics,discrimination and petrogenesis. Contrib Mineral Petrol 95: 407-419. doi: 10.1007/BF00402202
Plate Plate editing plotPlate figaro
#plot the diagrams plotPlate("Whalen")