Whalen {GCDkit}R Documentation

A type granitoids (Whalen et al. 1987)

Description

Set of discrimination plots to distinguish A-type granitoids as defined by Whalen et al.(1987).

Usage

    Whalen(plot.txt = getOption("gcd.plot.text"))

Arguments

plot.txt

logical, annotate fields by their names?

Details

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.

Whalen.png

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.

Value

To the matrix 'WR' are appended two columns, with Ga/Al ratios and values of the Agpaitic Index (labeled 'A.I.').

Note

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.

Author(s)

Vojtech Janousek, vojtech.janousek@geology.cz

References

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

See Also

Plate Plate editing plotPlate figaro

Examples

#plot the diagrams
plotPlate("Whalen")

[Package GCDkit version 4.0 Index]