Pearce1996 {GCDkit}R Documentation

Nb/Y - Zr/Ti diagram (Winchester + Floyd 1977, modified by Pearce 1996)

Description

Assigns data for Nb/Y vs. Zr/Ti diagram into Figaro template (list 'sheet') and appropriate values into 'x.data' and 'y.data'.

Usage

Pearce1996()

Details

Classification diagram proposed by Winchester & Floyd (1977) using incompatible element ratios (Nb/Y vs. Zr/Ti). As the original plot has been designed prior to the publication of the TAS diagram Le Bas et al. 1986, the field definition has been subsequently modified by Pearce (1996).

Pearce1996.png

The following fields are defined:

(Subalkaline) Basalt
Alkali basalt
Foidite
Andesite/Basaltic andesite
Trachyandesite
Tephriphonolite
Rhyolite/Dacite
Trachyte
Phonolite
Alkali Rhyolite

Value

sheet

list with Figaro Style Sheet data

x.data

Nb/Y wt. % ratio

y.data

Zr/Ti wt. % ratio

Author(s)

Vojtech Janousek, vojtech.janousek@geology.cz

References

Le Bas M J, Le Maitre R W, Streckeisen A & Zanettin B (1986) A chemical classification of volcanic rocks based on the total alkali-silica diagram. J Petrology 27: 745-750 doi: 10.1093/petrology/27.3.745

Pearce J A (1996) A User's Guide to Basalt Discrimination Diagrams. In Wyman D A (ed) Trace Element Geochemistry of Volcanic Rocks: Applications for Massive Sulphide Exploration. Geological Association of Canada, Short Course Notes 12, pp 79-113

Winchester J A & Floyd P A (1977) Geochemical discrimination of different magma series and their differentiation products using immobile elements. Chem Geol 20: 325-343 doi: 10.1016/0009-2541(77)90057-2

See Also

WinFloyd1 classify figaro plotDiagram

Examples

#Within GCDkit, the plot is called using following auxiliary functions:
#To Classify data stored in WR (Groups by diagram)
classify("Pearce1996")

#To plot data stored in WR or its subset (menu Classification)
plotDiagram("Pearce1996", FALSE)

[Package GCDkit version 4.0 Index]