LaYb: La/Yb-Yb

In pvermees/GeoplotR: Toolbox for Geological Plots

La/Yb-Yb

Description

(La/Yb)_N vs. Yb_N diagram of Martin (1986), which discriminates between Archean TTG suite and more modern adakites on the one hand, and classical island arcs on the other hand.

Usage

LaYb(
  La_n = NULL,
  Yb_n = NULL,
  xlim = NULL,
  ylim = NULL,
  show.labels = TRUE,
  ...
)

Arguments

La_n	vector with chondritic normalised La concentrations
Yb_n	vector with chondritic normalised Yb concentrations
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

Martin, H., 1986. Effect of steeper Archean geothermal gradient on geochemistry of subduction-zone magmas. Geology, 14(9), pp.753-756.

Examples

data(test,package='GeoplotR')
LaYb(La_n=100,Yb_n=10)

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