| 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.
Vojtěch Janoušek, vojtech.janousek@geology.cz
Whalen JB, Currie KL, Chappell BW (1987) A-type granites: geochemical characteristics,discrimination and petrogenesis. Contrib Mineral Petrol 95: 407-419. doi: 10.1007/BF00402202
Plate Plate editing plotPlate figaro
    sampleDataset("blatna")
    
    # plot the diagrams
    plotPlate("Whalen")