Whalen_failure1 {GCDkit}R Documentation

Whalen and Hildebrand (2019) - modified Pearce et al. (1984) plots

Description

Trace-element discrimination of arc, slab failure, and A-type granitic rocks of Whalen and Hildebrand (2019).

Usage

Whalen_failure1(plot.txt = getOption("gcd.plot.text"), filter.SiO2 = TRUE)

Arguments

plot.txt

logical; annotate the individual fields by textual labels?

filter.SiO2

logical; should be plotted only samples with SiO2 = 55-70 wt. %?

Details

Suite of four diagrams for discrimination of geotectonic environment of granitoid rocks, originally proposed by Pearce et al. (1984). It is based on combination of five trace elements (namely Y, Nb, Rb, Yb and Ta). I has been modified by Whalen and Hildebrand (2019) (fig. 10) to discriminate between (I-type) Arc, Slab failure and A1- and A2-type granitoid compositions.

Whalen_failure1.png

Value

sheet

list with Figaro Style Sheet data

x.data

x coordinates

y.data

y coordinates

Note

For non-A type samples, only those with ASI < 1.1 and SiO2 = 55-70 wt. % are plotted, as suggested in the original paper. This eliminates S-types, cumulate mafic arc, and felsic slab failure samples. The samples having Y + Nb > 60 and Yb + Ta > 6 ppm are A-types and these are plotted even if SiO2 > 70 wt.

If filter.SiO2=TRUE, the SiO2 filter is skipped.

Author(s)

Vojtěch Janoušek, vojtech.janousek@geology.cz

References

Pearce JA, Harris NW & Tindle AG (1984) Trace element discrimination diagrams for the tectonic interpretation of granitic rocks. J Petrology 25: 956-983. doi: 10.1093/petrology/25.4.956

Whalen JB, Hildebrand RS (2019) Trace element discrimination of arc, slab failure, and A-type granitic rocks. Lithos 348-349: 105179. doi: 10.1016/j.lithos.2019.105179

See Also

figaro plotDiagram

Examples

    sampleDataset("blatna")
    
    # plot the diagrams
    plotPlate("Whalen_failure1")

[Package GCDkit version 6.3.0 Index]