A cationic classification of common plutonic rocks and their magmatic associations : principles, method, applications

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Abstract
This classification is based on cationic calculations from major element data and then applied to simple chemical-mineralogical diagrams. The method follows two sequential steps. The first step is concerned with characterising the individual sample. From the cationic values, the sample is identified by name and its chemical and mineralogical characteristics are determined. The second and most important aim of the chemical-mineralogical diagrams is to define the magmatic association to which the sample or group of samples belong. Based on chemical data, this method can also be used to classify common volcanic rocks. Several applications are presented.

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