Enrique {GCDkit}R Documentation

or+ab - 2Q - 4an ternary diagram (Enrique 2018)

Description

Assigns data for Enrique's diagram into Figaro template (list 'sheet') and appropriate values into 'x.data' and 'y.data'. The or+ab, 2Q and 4an coordinates are assigned into matrix 'results'.

Usage

Enrique()

Details

This diagram of Enrique (2018), based on CIPW-normative values, is intended to replace the IUGS QAP plot (Le Maitre et al 2002) if only chemical, and not modal, analyses are available.

Enrique.png

The apices are defined as follows:

or+ab = based on normative orthoclase and albite in wt. %

2Q = based on normative quartz in wt. %

4an = based on normative anorthite in wt. %

or+ab + 2Q + 4an = 100 %

The following fields are defined:

1. quartzolite 13. quartz monzodiorite
2. quartz-rich granitoid 14. quartz diorite
3. alk-fsp. granite 15. quartz gabbro
4. syenogranite 16. quartz eucrite
5. monzogranite 17. alkali-feldspar syenite
6. granodiorite 18. syenite
7. tonalite 19. monzonite
8. tonalgabbro 20. monzodiorite
9. tonaleucrite 21. diorite
10. alk-fsp quartz syenite 22. gabbroids
11. quartz syenite 23. eucritoids
12. quartz monzonite

Value

sheet

list with Figaro Style Sheet data

x.data, y.data

or+ab,2Q and 4an data (see details) transformed to orthogonal coordinates

Author(s)

Vojtěch Janoušek, vojtech.janousek@geology.cz

References

Enrique P (2018) Clasificación normativa de las rocas plutónicas saturadas y sobresaturadas en sílice basada en la clasificación modal QAP: El diagrama 2Q-(or+ab)-4an. Geogaceta 63:95-98 online pdf

Streckeisen A (1974) Classification and nomenclature of plutonic rocks. Geol Rundsch 63: 773-786 doi: 10.1007/BF01820841

Le Maitre RW et al (2002) Igneous Rocks. A Classification and Glossary of Terms. 2nd edition. Cambridge University Press. doi: 10.1017/CBO9780511535581

See Also

CIPW classify figaro plotDiagram

Examples

    data(sazava)
    accessVar("sazava")
    
    # plots the or+ab - 2Q - 4an ternary diagram for the current dataset
    plotDiagram("Enrique", FALSE)

    # classifies the current dataset using the or+ab - 2Q - 4an ternary diagram
    classify()
    print(results)
    
    classify("Enrique",source.sheet=FALSE)

[Package GCDkit version 6.1 Index]