Abstract
New “tectonomagmatic” discriminant diagrams are suggested to identify, based on geochemical data on rocks, geodynamic environments in which intermediate magmatic rocks were formed. The diagrams are underlain by discriminant analysis of reference selections of chemical analyses of intermediate magmatic rocks from modern island arcs (n = 7787) and from intraplate (n = 4344) and postcollisional (n = 3207) magmatic associations. The application of the diagrams makes it possible to reliably classify approximately 70% analyses of intermediate rocks.
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