TiV {GCDkit}R Documentation

Shervais (1982) Ti - V LDA/QDA)

Description

Linear and quadratic discrimination-analysis-based versions of the Ti-V (Shervais 1982) diagram for geotectonic discrimination of igneous rocks of Vermeesch 2006.

Usage

TiV(Ti = WR[, "Ti", drop = FALSE], V = WR[, "V", drop = FALSE], type = c("LDA", "QDA"), 
    ternary = FALSE, show.labels = TRUE, short = TRUE, xlim = c(0, 30000), 
    ylim = c(0, 500), ...)

Arguments

Ti

vector of Ti concentrations (ppm)

V

vector of V concentrations (ppm)

type

either 'LDA' for linear discriminant analysis, 'QDA' for quadratic discriminant analysis

ternary

logical. If TRUE, produces a ternary diagram. Only used if type is LDA or QDA.

show.labels

logical. If TRUE, labels the discrimination fields

short

logical. If TRUE, uses abbreviated labels for the discrimination fields

xlim

x-axis limits

ylim

y-axis limits

...

additional arguments for the generic pointsfunction

Details

This plot comes from the GeoplotR collection available online at https://isoplotr.es.ucl.ac.uk/geoplotr.

TiV.png

Value

A list with tectonic affinities.

Note

This plot is not Figaro-compatible.

Author(s)

Pieter Vermeesch, p.vermeesch@ucl.ac.uk,

GCDkit implementation by Vojtěch Janoušek, vojtech.janousek@geology.cz

References

Shervais J W (1982) Ti-V plots and the petrogenesis of modern and ophiolitic lavas. Earth Planet Sci Lett 59: 101-118. doi: 10.1016/0012-821X(82)90120-0

Vermeesch P (2006) Tectonic discrimination diagrams revisited. Geochem Geophys Geosyst 7:Q06017 doi: 10.1029/2005GC001092

See Also

Shervais

Examples

sampleDataset("atacazo")

out <- TiV(type="LDA")
print(out$class)

print(out)

[Package GCDkit version 6.3.0 Index]