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A bimodal large igneous province (LIP) with subequal volumes of nearly coeval felsic-mafic volcanic rocks occurs in the ca. 2500 Ma Dongargarh Group of central India, perhaps the only LIP of this kind known to date. Although some of its features match the expectations of the plume model, the longer eruption times (∼≤30–73 Ma) and bimodal distribution of lava types do not. Melting of crust and mantle, driven by a common thermal perturbation in an extensional tectonic setting, and interactions of the crustal and mantle melts gave rise to the province. This contrasts with contemporary mantle-melting or crust-melting models for LIP genesis.

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