| LaRoche {GCDkit} | R Documentation |
Assigns data for the R1-R2 diagram
into Figaro template (list 'sheet') and appropriate values
into 'x.data' and 'y.data'.
LarocheVolc() LarochePlut()
R1-R2 plot, as proposed by De La Roche et al. (1980) for volcanic, as well as plutonic rocks.
| volcanic rocks | plutonic rocks |
| trachyphonolite | nepheline syenite |
| phonolite | nepheline syenite |
| phono-tephrite | essexite |
| tephrite | essexite |
| alkali rhyolite | alkali granite |
| qtz.trachyte | qtz.syenite |
| trachyte | syenite |
| rhyolite | granite |
| qtz.latite | qtz.monzonite |
| rhyodacite | granodiorite |
| dacite | tonalite |
| andesite | diorite |
| lati-andesite | monzodiorite |
| latite | monzonite |
| mugearite | syenodiorite |
| nephelinite | ijolite |
| andesi-basalt | gabbro-diorite |
| lati-basalt | monzogabbro |
| hawaiite | syenogabbro |
| tholeiite | gabbronorite |
| basalt | gabbro |
| alkali basalt | alkaligabbro |
| basanite | theralite |
| ankaratrite | melteigite |
| picritic rock | ultramafic rock |
sheet |
list with Figaro Style Sheet data |
x.data |
R1 = 4 * Si - 11 * (Na + K) - 2 * (Fe[total as bivalent] + Ti),
all in millications; as calculated by the function ' |
y.data |
R2 = 6 * Ca + 2 * Mg + Al, all in millications; as calculated by
the function ' |
Vojtěch Erban, erban@sopky.cz
& Vojtěch Janoušek, vojtech.janousek@geology.cz
De La Roche H, Leterrier J, Grandclaude P, & Marchal M (1980) A classification of volcanic and plutonic rocks using R1R2- diagram and major element analyses - its relationships with current nomenclature. Chem Geol 29: 183-210 doi: 10.1016/0009-2541(80)90020-0
classify figaro LaRocheCalc millications plotDiagram
sampleDataset("blatna")
# Plot the diagram
plotDiagram("LarocheVolc", FALSE)
# or
plotDiagram("LarochePlut", FALSE)
# To classify data stored in WR
classify("LarocheVolc")
# or
classify("LarochePlut")