This is a collection of custom diagrams I wrote for GCDkit (Janoušek et al., 2006).
Copy the *.R
files into the Diagrams/User/
subdirectory of your
local GCDkit library.
You can check your local library path by running
Sys.getenv("R_LIBS_USER")
in an R session. If the R_LIBS_USER
variable is unset you can run .libPaths()
to get the full list of
library paths R knows about.
Once copied, you will find the diagrams under the Plots > User defined menu item.
The diagrams are tested on Linux running R 4.1.0 and GCDkit 6.0.
- SiO2–CaO/(CaO+K2O) diagrams of Enrique &
Esteve (2019).
- Enrique, P. & Esteve, S. (2019). "A chemical approximation to the modal QAPF and normative Q' (F')-ANOR classification of the igneous rocks based on their SiO2-CaO-K2O content". Geogaceta, 66, 91–94. Link to PDF
- Enrique, P. & Esteve, S. (2019). "Comparative study of the classification of plutonic and volcanic rocks using the normative Q' (F')-ANOR and chemical SiO2–100⋅CaO/(CaO+K2O) diagrams". Geogaceta, 66, 95–98. Link to PDF
- 2Q–(or+ab)–4an diagram of Enrique (2018).
- 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. Link to PDF
- Al2O3 versus normative plagioclase diagram,
figure 6 of Irvine & Baragar (1971).
- Irvine, T. N. & Baragar, W. R. A. (1971). "A Guide to the Chemical Classification of the Common Volcanic Rocks". Canadian Journal of Earth Sciences, 8, 523–548. DOI 10.1139/e71-055
- Peralkaline quartz-normative extrusive rock classification of
MacDonald (1974).
- MacDonald, R. (1974). "Nomenclature and petrochemistry of the peralkaline oversaturated extrusive rocks". Bulletin Volcanologique, 38, 498–516. DOI 10.1007/BF02596896
- Basalt tetrahedron's Q-Ne-Ol plane, figure 2 of Yoder & Tilley (1962).
- Yoder, H.S. & Tilley, C. E. (1962). "Origin of basalt magmas: An experimental study of natural and synthetic rock systems". Journal of Petrology, 3, 342–532. DOI 10.1093/petrology/3.3.342
Janoušek, V.; Farrow, C. M. & Erban, V. (2006). "Interpretation of Whole-rock Geochemical Data in Igneous Geochemistry: Introducing Geochemical Data Toolkit (GCDkit)". Journal of Petrology, Oxford University Press, 47, 1255–1259. DOI 10.1093/petrology/egl013
R Core Team (2024). R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. URL https://www.R-project.org/
All the diagrams are released under the same license as GCDkit (i.e.
GPL (>= 2)
).