Multivariate Analysis, Mass Balance Techniques, and Statistical Tests as Tools in Igneous Petrology: Application to the Sierra de las Cruces Volcanic Range (Mexican Volcanic Belt)

Figure 13

Mean proportions of mafic end-members in the comingled lavas from the Sierra de las Cruces, calculated using the mass-balance equation 𝑄^𝑖_𝐴=|𝐶^𝑖_𝑀−𝐶^𝑖_𝐵|/|𝐶^𝑖_𝐴−𝐶^𝑖_𝐵| [31] for [SiO₂]_adj, [FeO]_adj, [MgO]_adj, Co, and V. Proportions determined using [SiO₂]_adj are plotted against those obtained using the other constituents. The diagonal line indicates perfect agreement between results.

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