Whalen_failure1 {GCDkit} | R Documentation |
Trace-element discrimination of arc, slab failure, and A-type granitic rocks of Whalen and Hildebrand (2019).
Whalen_failure1(plot.txt = getOption("gcd.plot.text"), filter.SiO2 = TRUE)
plot.txt |
logical; annotate the individual fields by textual labels? |
filter.SiO2 |
logical; should be plotted only samples with SiO2 = 55-70 wt. %? |
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.
sheet |
list with Figaro Style Sheet data |
x.data |
x coordinates |
y.data |
y coordinates |
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.
Vojtěch Janoušek, vojtech.janousek@geology.cz
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
sampleDataset("blatna") # plot the diagrams plotPlate("Whalen_failure1")