Abstract
The paper addresses the current understanding of the inner structure of the layered intrusions at Dufek Massif in the Pensacola Mountains and the Utpostane and Muren intrusions in Queen Maud Land, Antarctica, which are still poorly known to Russian geologists. The magmatic events at approximately 180 Ma, including the emplacement of layered intrusions, are thought to had predated the breakup of the Gondwana supercontinent. The spatiotemporal similarities of the intrusions determine the importance of the problem of whether they were produced by a single or more than one parental magmas, which are thought to have been derived under the effect of a superplume.
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