Abstract
The widespread High Arctic Large Igneous Province (HALIP) exhibits prolonged melting over more than 50 Myr, an observation that is difficult to reconcile with the classic view of large igneous provinces and associated melting in plume heads. Hence, the suggested plume-related origin and classification of HALIP as a large igneous province have been questioned. Here, we use numerical models with the code ASPECT that include melting and melt migration to investigate a rising plume interacting with variable lithosphere thickness i.e. as applicable to the extended-to-cratonal nature of the Sverdrup Basin of the Canadian Arctic Islands. This presentation will present the work from a paper currently in review (Heyn, Shephard and Conrad) within the framework of the POLARIS: Evolution of the Arctic in deep time project.