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Mesozoic igneous activity in the Maranha˜o province, northern Brazil: 40Ar/ 39Ar evidence for separate episodes of basaltic magmatism

Magmatic ProcessVolcanologyEarth ScienceMaranha˜o ProvinceEngineeringMagmatismIgneous PetrogenesisSeparate EpisodesGeologyGeochemistryIgneous ProcessNorthern BrazilPetrologyMagmatic-hydrothermal SystemTectonics