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
data(blatna) accessVar("blatna") # Plot the diagram plotDiagram("LarocheVolc", FALSE) # or plotDiagram("LarochePlut", FALSE) # To classify data stored in WR classify("LarocheVolc") # or classify("LarochePlut")