| Debon {GCDkit} | R Documentation | 
Assigns data for Debon & Le Fort's B-A and P-Q diagrams into Figaro template (list 'sheet') 
and appropriate values into 'x.data' and 'y.data'.  
DebonBA(reference.rocks=FALSE) DebonPQ(reference.rocks=FALSE)
| reference.rocks | logical; should be the ideal rock compositions also plotted?. | 
 
The B-A diagram as proposed by Debon and Le Fort (1983) defines six sectors (I - VI), reflecting alumina balance of samples. Following minerals are characteristic for individual sectors:
| I | Peraluminous domain | muscovite > biotite | 
| II | biotite > muscovite | |
| III | biotite (+- minor amphibole) | |
| IV | Metaluminous domain | biotite, amphibole, +- pyroxene | 
| V | clinopyroxene, +- amphibole, +-biotite | |
| VI | unusual mineral associations (carbonatites ...) | 
 
Layout of the P-Q diagram of the same authors corresponds to cationic proportions of quartz, K-feldspar and plagioclase. Abbreviations used as classification output represent following rocks groups:
| label | plutonic rocks | volcanic rocks | 
| go | gabbro, diorite, anorthosite | basalt, andesite, kenningite | 
| mzgo | monzogabbro, monzodiorite | latibasalt, latiandesite | 
| mz | monzonite | latite | 
| s | syenite | trachyte | 
| dq | qtz diorite,qtz gabbro,qtz anorthosite | qtz andesite,qtz basalt | 
| mzdq | qtz monzodiorite,qtz monzogabbro | qtz latiandesite,qtz latibasalt | 
| mzq | quartz monzonite | quartz latite | 
| sq | quartz syenite | quartz trachyte | 
| to | tonalite, trondhjemite | dacite | 
| gd | granodiorite, granogabbro | rhyodacite | 
| ad | adamellite | dellenite | 
| gr | granite | rhyolite | 
Parameters for the diagram are calculated by the function 'DebonCalc'.
All of them are based on millications (1000 gram-atoms per 100 grams).
P = K - (Na + Ca)
Q = Si / 3 - (K + Na + 2 * Ca / 3)
A = Al - (K + Na + 2 Ca)
B = Fe + Mg + Ti
Note that the diagrams B-A and P-Q are recommended as complementary, i.e. resulting names should be used in conjunction (granite II etc.). For details, see Debon & Le Fort (1983) or (1988).
| sheet | list with Figaro Style Sheet data | 
| x.data | P or B value. See details. | 
| y.data | Q or A value. See details. | 
Vojtěch Erban, erban@sopky.cz
& Vojtěch Janoušek, vojtech.janousek@geology.cz
Debon F & Le Fort P (1983) A chemical-mineralogical classification of common plutonic rocks and associations. Trans Roy Soc Edinb; Earth Sci 73: 135-149 doi: 10.1017/S02635933000101173
Debon F & Le Fort P (1988) A cationic classification of common plutonic rocks and their magmatic associations: principles, method, applications. Bull. Mineral 111: 493-511
classify figaro plotDiagram DebonCalc DebonQB DebonKNaB DebonBMgNo DebonBQF
    sampleDataset("blatna")
    
    plotDiagram("DebonBA",FALSE,reference.rocks=TRUE)
    figCol("red")
    
    options("gcd.plot.text"=FALSE)
    plotDiagram("DebonPQ",FALSE,reference.rocks=TRUE)
    figCol("red")
    options("gcd.plot.text"=TRUE)