AFM {GCDkit}R Documentation

AFM diagram (Irvine + Baragar 1971)

Description

Assigns data for AFM ternary diagram into Figaro template (list 'sheet') and appropriate values into 'x.data' and 'y.data'.

Usage

AFM(equ=FALSE)

Arguments

equ

Logical: Should the template use boundary defined by equation?

Details

The AFM diagram is a triangular plot with apices A, F and M defined as follows:

A = (K2O + Na2O) wt. %

F = FeOtot wt. %

M = MgO wt. %

A + F + M = 100 %

The classification diagram divides data into 'tholeiite series' and 'calc-alkaline series' as proposed by Irvine & Baragar (1971). For extreme values linear extrapolation of boundary curve is employed.

AFM.png

Value

sheet

list with Figaro Style Sheet data

x.data, y.data

A, F, M values (see details) transformed into 2D

Author(s)

Vojtech Erban, vojtech.erban@geology.cz
& Vojtech Janousek, vojtech.janousek@geology.cz

References

Irvine T M & Baragar W R (1971) A guide to the chemical classification of common volcanic rocks. Canad J Earth Sci 8: 523-548 doi: 10.1139/e71-055

See Also

classify figaro plotDiagram

Examples

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

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

[Package GCDkit version 4.0 Index]