| 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")