ThCo: Th-Co

In pvermees/GeoplotR: Toolbox for Geological Plots

Th-Co

Description

Th vs Co discrimination diagram of Hastie et al. (2007) for tholeiitic, calc-alkaline, and more alkaline arc series, and basaltic, andesitic, and rhyolitic compositions.

Usage

ThCo(Th = NULL, Co = NULL, xlim = NULL, ylim = NULL, show.labels = TRUE, ...)

Arguments

Th	vector with Th concentrations (ppm)
Co	vector with Co concentrations (ppm)
xlim	x-axis limits
ylim	y-axis limits
show.labels	logical. If TRUE, labels the polygonal decision fields with text strings.
...	additional arguments to the generic points function, may include the logical argument show.labels which labels the fields in the diagram.

Value

a vector with tectonic affinities

References

Hastie, A.R., Kerr, A.C., Pearce, J.A., Mitchell, S.F., 2007, Classification of Altered Volcanic Island Arc Rocks using Immobile Trace Elements: Development of the Th-Co Discrimination Diagram. Journal of Petrology, v. 48, p. 2341-2357.

Examples

data(test,package='GeoplotR')
ThCo(Th=test[,'Th'],Co=test[,'Co'])

pvermees/GeoplotR documentation built on Aug. 20, 2024, 4:45 a.m.