What caused the high temperatures that resulted in the Cretaceous aged komatiite lavas of Gorgona Island, Colombia?
There are some suggestions in the recent paper in Nature Geoscience about Tortugal lava suite. The suite formed 89 million years ago and recorded mantle temperatures as high as Archaean komatiites. The mantle plumes are chemically and thermally heterogeneous, so the researchers interpret these rocks as the result of melting the hot core of the plume head that produced the Caribbean large igneous province. Their results imply that a mantle reservoir as hot as those responsible for some Archaean lavas has survived eons of convection in the deep Earth and is still being tapped by mantle plumes.

The link: https://www.nature.com/ngeo/journal/v10/n6/full/ngeo2954.html