Geochemical modeling and Nd-Sr data links nephelinite-phonolite successions and xenoliths of Trindade Island (South Atlantic Ocean, Brazil)

摘要

The Trindade Island corresponds to the eastern end of the submarine E-W Vitoria-Trindade Chain as part of the Trindade plume track on the South American plate. It is a suitable site for petrogenetic investigations, since a series of unusual rock compositions crops out within nephelinite-phonolite successions and scarce xenoliths.