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Origin, Evolution, And Tectonic Setting Of The Eastern Part Of The Mexican Volcanic Belt And Comparison With The Central American Volcanic Arc From Conventional Multielement Normalized And New Multidimensional Discrimination Diagrams And Discordancy And Significance Tests, Surendra P. Verma

Turkish Journal of Earth Sciences

If both the Mexican Volcanic Belt (MVB) and the Central American Volcanic Arc (CAVA) have been related to the subduction of the Cocos plate beneath the North American and Caribbean plates, respectively, their magmas, and especially the less evolved basic varieties, should show considerable similarities. The conventional multielement normalized diagrams indicate more complex petrogenetic processes for the MVB than the CAVA. Forty-five statistically coherent tectonomagmatic discrimination diagrams were used to infer the tectonic setting of the controversial geological subprovince of the eastern part of the MVB (E-MVB). Basic rocks from the E-MVB indicated a continental rift setting, whereas the intermediate …