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The Pedra Branca Syenite is a 610Ma post-collisional pluton intrusive in the Socorro–Guaxupé Nappe, an allochthonous terrain emplaced at the SW border of the São Francisco craton, Brazil. The pluton is largely dominated by laminated syenites with colour index 20–25 displayed in a zoned structure, with a first unit of marginally peralkaline silica-saturated syenites exposed at its E and N border intruded...
Major and trace-element microanalyses of the main minerals from the 610Ma Pedra Branca Syenite, southeast Brazil, allow inferences on intensive parameters of magmatic crystallization and on the partition of trace-elements among these minerals, with important implications for the petrogenetic evolution of the pluton. Two main syenite types make up the pluton, a quartz-free syenite with tabular alkali...
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