40Ar–39Ar ages and isotope geochemistry of Cretaceous basalts in northern Madagascar: Refining eruption ages, extent of crustal contamination and parental magmas in a flood basalt province

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40Ar–39Ar ages and isotope geochemistry of Cretaceous basalts in northern Madagascar: Refining eruption ages, extent of crustal contamination and parental magmas in a flood basalt province

The Madagascar Cretaceous igneous province exposed in the Mahajanga basin is represented by basalt and basaltic andesite lavas. New 40Ar–39Ar plateau ages (92.3 ± 2.0 Ma and 91.5 ± 1.3 Ma) indicate that the magmatism in the Mahajanga basin started about 92 Ma ago. Four geochemically distinct magma t...

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Bibliographic Details
Main Authors:	Cucciniello, C., Melluso, L., Jourdan, Fred, Mahoney, J., Meisel, T., Morra, V.
Format:	Journal Article
Published:	Cambridge University Press 2013
Subjects:	Cretaceous basalts isotope geochemistry Madagascar ages
Online Access:	http://hdl.handle.net/20.500.11937/44742

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