Sylvester {GCDkit}R Documentation

Sylvester (1989)

Description

Assigns data for a binary plot (Al2O3+CaO)/(FeOt+Na2O+K2O) vs. 100*(MgO+FeOt+TiO2)/SiO2, proposed by Sylvester (1989) to distinguish the alkaline collision-related alkaline granites into Figaro template (list 'sheet') and appropriate values into 'x.data' and 'y.data'.

Usage

Sylvester()

Details

In the plot (Al2O3+CaO)/(FeOt+Na2O+K2O) vs. 100*(MgO+FeOt+TiO2)/SiO2 of Sylvester (1989) can be distinguished 'Alkaline'collision-related granites, from 'Calc-alkaline & Strongly peraluminous' types (solid line). The strongly fractionated calc-alkaline varieties are separated by the dashed line.

Sylvester.png

Note that only samples with SiO2 > 68 wt. % are plotted.

Value

sheet

list with Figaro Style Sheet data

x.data

(Al2O3+CaO)/(FeOt+Na2O+K2O) [wt. %]

y.data

100*(MgO+FeOt+TiO2)/SiO2 [wt. %]

Author(s)

Vojtěch Janoušek, vojtech.janousek@geology.cz

References

Sylvester P J (1989) Post-collisional alkaline granites. J Geol 97: 261-280. doi: 10.1086/629302

See Also

figaro plotDiagram

Examples

    data(blatna) 
    accessVar("blatna")
    
    # plot the diagram
    plotDiagram("Sylvester", FALSE)

[Package GCDkit version 6.1 Index]