Cabanis {GCDkit} | R Documentation |
Assigns data for a La/10-Y/15-Nb/8 ternary diagram
into Figaro template (list 'sheet
') and appropriate values
into 'x.data
' and 'y.data
'.
Cabanis()
None.
The ternary plot La/10-Y/15-Nb/8 designed by Cabanis and Lecolle (1989) serves for distinguishing magmas that have originated (1) at orogenic, compressive, destructive plate boundaries (calc-alkaline, closer to the La apex and tholeiitic, closer to the Y apex); (2) in anorogenic, distensive inter-plate domains (including NMORB/EMORB and alkaline rocks); and, in between, (3) in either compressive or distensive, intra-continental, late- to post- orogenic zones. Y/Nb serves here as the "alkalinity index" and La/Y as the "calc-alkaline index". See the original paper for details.
The diagram can also serve for recognition of magmas contaminated by continental crust or resulting from magma mixing.
sheet |
list with Figaro Style Sheet data |
x.data |
x coordinates |
y.data |
y coordinates |
Vojtěch Janoušek, vojtech.janousek@geology.cz
Cabanis B, Lecolle M (1989) Le diagramme La/10-Y/15-Nb/8: un outil pour la discrimination des séries volcaniques et la mise en évidence des processus de mélange et/ou de contamination crustale. CR Acad Sci IIA 309: 2023-2029
Coordinates and graph layout are taken from website of Kurt Hollocher.
data(blatna) accessVar("blatna") plotDiagram("Cabanis",FALSE,TRUE)