Pearce Nb-Ti-Yb {GCDkit}R Documentation

Pearce (2008) Nb/Yb-TiO2/Yb diagram

Description

Assigns data for a TiO2/Yb vs. Nb/Yb diagram into Figaro template (list 'sheet') and appropriate values into 'x.data' and 'y.data'.

Usage

    PearceNbTiYb(reservoirs=TRUE,xmin=0.1,xmax=100,ymin=0.1,ymax=10)

Arguments

reservoirs

logical, should be plotted average NMORB, EMORB and OIB?

xmin,xmax

numeric, limits for the x axis.

ymin,ymax

numeric, limits for the y axis.

Details

The diagram TiO2/Yb vs. Nb/Yb serves as 'melting depth proxy' and hence for indicating mantle temperature and thickness of the conductive lithosphere (Pearce 2008). It distinguishes basalts, which have originated by shallow melting, out of garnet stability field ('MORB array') from those spanning from deep melting with garnet in the residue ('OIB array'). Plotted for reference are average compositions of NMORB, EMORB and OIB taken from Sun and McDonough (1984).

PearceNbTiYb.png

Value

sheet

list with Figaro Style Sheet data

x.data

Nb/Yb

y.data

TiO2/Yb

Author(s)

Vojtech Janousek, vojtech.janousek@geology.cz

References

Pearce JA (2008) Geochemical fingerprinting of oceanic basalts with applications to ophiolite classification and the search for Archean oceanic crust. Lithos 100: 14-48 doi:10.1016/j.lithos.2007.06.016

Sun SS, McDonough WF (1989) Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. In: Saunders AD, Norry M (eds) Magmatism in Ocean Basins. Geological Society of London Special Publications 42, pp 313-345

See Also

figaro plotDiagram PearceNbThYb

Examples

#plot the diagram
plotDiagram("PearceNbTiYb",FALSE,FALSE,reservoirs=TRUE)

plotDiagram("PearceNbTiYb",FALSE,FALSE,reservoirs=FALSE)

[Package GCDkit version 4.1 Index]