Variation diagram bivariate plots

Triangular Triangular variation digrams are used when it is necessary to show simultaneous variation change between three variables. However, this practice is not recommended and diagrams bivariate plots are to be preferred, since both the computation of the plotting parameters and the interpretation of the resultant trends raise a number of important problems (see Section 2.7). 

The two main types of variation diagram currently used by geochemists are considered in this section — bivariate plots and triangular variation diagrams. 

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