Paleocene on-spreading-axis hotspot volcanism along the Ninetyeast Ridge: An interaction between the Kergulene Hotspot and the Wharton spreading center

摘要

Investigations of three plausible tectonic settings of the Kerguelen hotspot relative to the Wharton spreading center evoke the on-spreading-axis hotspot volcanism of Paleocene (60-54 Ma) age along the Ninetyeast Ridge. The hypothesis is consistent with magnetic lineations and abandoned spreading Centers of the eastern Indian Ocean and seismic structure and radiometric dates of the Ninetyeast Ridge.