AFM {GCDkit} | R Documentation |
Assigns data for AFM ternary diagram into Figaro template (list 'sheet
') and appropriate values into 'x.data
' and 'y.data
'.
AFM(equ=FALSE)
equ |
Logical: Should the template use boundary defined by equation? |
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.
sheet |
list with Figaro Style Sheet data |
x.data, y.data |
A, F, M values (see details) transformed into 2D |
Vojtěch Erban, erban@sopky.cz
& Vojtěch Janoušek, vojtech.janousek@geology.cz
Irvine TM & Baragar WR (1971) A guide to the chemical classification of common volcanic rocks. Canad J Earth Sci 8: 523-548 doi: 10.1139/e71-055
data(blatna) accessVar("blatna") #To plot data stored in WR or its subset (menu Classification) plotDiagram("AFM", FALSE) #To Classify data stored in WR (Groups by diagram) classify("AFM")