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)

Vojtěch Janoušek, vojtech.janousek@geology.cz

References

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

Winchester JA & Floyd PA (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

    data(atacazo)
    accessVar("atacazo")
    
    # Plot
    plotDiagram("Pearce1996", FALSE)
    
    # Classify
    classify("Pearce1996")

[Package GCDkit version 6.1 Index]