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The distribution of volcanism in Liaohe basin, Eastern China indicates that major rift-bounding faults played an important role in channeling the magmas towards the surface. Major-and trace element and Sr-Nd isotopic studies of the most Primitive basic magmas was triggered by the upwelling of a thermally and geochemically anomalous mantle plume from the deep mantle during Paleogene. The peak of the volcanism occurred, from 42.4 to 39.5 Ma, coincident with the maximum amount of lithospheric extension. Volcanism, rifting and domal basement uplift were contemporaneous in Eastern depression and moved gradually towards other depressions, suggesting that the thermal and geodynamic evolution of Liaohe basin could have been influenced by a mantle plume with lateral migration during Paleogene.
The distribution of volcanism in Liaohe basin, Eastern China indicates that major rift-bounding faults played an important role in channeling the magmas towards the surface. Major-and trace element and Sr-Nd isotopic studies of the most primitive mitmas was triggered by the upwelling of a thermally and geochemically anomalous mantle plume from the deep mantle during Paleogene. The peak of the volcanism occurred, from 42.4 to 39.5 Ma, coincident with the maximum amount of lithospheric extension. Volcanism, rifting and domal basement uplift were contemporaneous in Eastern depression and moved gradually towards other depressions, suggesting that the thermal and geodynamic evolution of Liaohe basin could have been by by mantle plume with lateral migration during Paleogene.