Cox {GCDkit}R Documentation

TAS diagram (Cox et al. 1979)

Description

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

Usage

CoxVolc(alkline=TRUE)

CoxPlut(alkline=TRUE)

Arguments

alkline

Logical: Should the boundary between alkaline and subalkaline rocks (Irvine & Baragar 1971) be drawn?

Details

TAS diagram, as proposed by Cox et al. (1979) for volcanic rocks and adapted by Wilson (1989) for plutonic rocks contains following fields:

volcanic rocks

plutonic rocks

basalt

gabbro

basaltic andesite

undefined

andesite

diorite

dacite

quartz diorite (granodiorite)

rhyolite

alkali granite/granite

hawaiite

gabbro

trachyandesite

undefined

basanite/tephrite

undefined

mugearite

syeno-diorite

benmorite

syenite

trachyte

syenite

nephelinite

ijolite

phonology nephelinite

undefined

phonolitic tephrite

undefined

phonolite

nepheline syenite

Value

sheet

list with Figaro Style Sheet data

x.data

SiO2 weight percent

y.data

Na2O+K2O weight percent

Author(s)

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

References

Cox K G, Bell J D & Pankhurst (1979) The Interpretation of Igneous Rocks. Allen & Unwin, London

Wilson M (1989) Igneous Petrogenesis. Chapman & Hall, London

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

#TAS diagram is called using following auxiliary functions:
#Classifies data stored in WR (Groups by diagram)
classify("CoxVolc")
#or
classify("CoxPlut")

#Plots data stored in WR or its subset (menu Classification)
plotDiagram("CoxVolc", FALSE)
#or
plotDiagram("CoxPlut", FALSE)

[Package GCDkit version 3.00 Index]