NbZrY {GCDkit} | R Documentation |
Linear and quadratic discrimination-analysis-based versions of the ternary diagram Zr/4 - 2Nb - Y (Meschede 1986)) for geotectonic discrimination of igneous rocks of Vermeesch 2006.
NbZrY(Zr = WR[, "Zr", drop = FALSE], Nb = WR[, "Nb", drop = FALSE], Y = WR[, "Y", drop = FALSE], type = c("Meschede", "LDA", "QDA"), ternary = TRUE, show.labels = TRUE, short = TRUE, ...)
Zr |
vector of Zr concentrations (ppm) |
Nb |
vector of Nb concentrations (ppm) |
Y |
vector of Y concentrations (ppm) |
type |
either |
ternary |
logical. If |
show.labels |
logical. If |
short |
logical. uses abbreviated labels for the discrimination fields |
... |
additional arguments for the generic |
This plot comes from the GeoplotR collection available online at https://isoplotr.es.ucl.ac.uk/geoplotr.
A list with tectonic affinities.
This plot is not Figaro-compatible.
Pieter Vermeesch, p.vermeesch@ucl.ac.uk,
GCDkit implementation by Vojtěch Janoušek, vojtech.janousek@geology.cz
Meschede M (1986) A method of discriminating between different types of mid-ocean ridge basalts and continental tholeiites with the Nb-Zr-Y diagram. Chem Geol 56:207-218 doi: 10.1016/0009-2541(86)90004-5
Vermeesch P (2006) Tectonic discrimination diagrams revisited. Geochem Geophys Geosyst 7:Q06017 doi: 10.1029/2005GC001092
sampleDataset("atacazo") out <- NbZrY(type="QDA") print(out$class) print(out)