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- W2137587788 abstract "The early Cretaceous thermal perturbation beneath the eastern continental margin of the Indian shield resulted in the eruption of the Rajmahal Traps. To understand the impact of the magmatic process that originated in the deep mantle on the lower crustal level of the eastern Indian shield and adjoining Bengal basin the conspicuous gravity anomalies observed over the region have been modelled integrating with available geophysical information. The 3-D gravity modelling has delineated 10–15 km thick high-density (ρ = 3.02 g/cm3) accreted igneous layer at the base of the crust beneath the Rajmahal Traps. Thickness of this layer varies from 16 km to the west of the Rajmahal towards north to about 12 km near Kharagpur towards south and about 18 km to the east of the Raniganj in the central part of the region. The greater thickness of the magmatic body beneath the central part of the region presents itself as the locus of the potential feeder channel for the Rajmahal Traps. It is suggested that the crustal accretion is the imprint of the mantle thermal perturbation, over which the eastern margin of the eastern Indian shield opened around 117 Ma ago. The nosing of the crustal accretion in the down south suggests the possible imprint of the subsequent magmatic intrusion along the plume path." @default.
- W2137587788 created "2016-06-24" @default.
- W2137587788 creator A5006054080 @default.
- W2137587788 creator A5034549955 @default.
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- W2137587788 date "2004-12-01" @default.
- W2137587788 modified "2023-09-30" @default.
- W2137587788 title "Magmatic underplating beneath the Rajmahal Traps: Gravity signature and derived 3-D configuration" @default.
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- W2137587788 doi "https://doi.org/10.1007/bf02704035" @default.
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