Tracking the Tristan-Gough mantle plume using discrete chains of intraplate volcanic centers buried in the Walvis Ridge

J.M. O'Connor, W. Jokat

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

Resolving the age-distance relation of volcanism along the Walvis Ridge (southern Atlantic Ocean) is essential to understanding relative motion between the African plate and the Tristan-Gough mantle plume since the opening of the South Atlantic. However, tracking the location of the Tristan-Gough plume might not be practicable if most of the complex morphology of the massive Walvis Ridge is related to the proximity of the South Atlantic mid-ocean ridge. Here we use new 40Ar/39Ar basement ages for the Tristan- Gough hotspot track, together with information about morphology and crustal structure from new swath maps and seismic profiles, to infer that separated age-progressive intraplate segments track the location of the Tristan-Gough mantle plume. The apparent continuity of the inferred age-distance relation between widely separated age-progressive segments implies a connection to a stable or constantly moving source in the mantle.
Original languageEnglish
Pages (from-to)715-718
JournalGeology
Volume43
Issue number8
DOIs
Publication statusPublished - 2015

Bibliographical note

PT: J; NR: 35; TC: 1; J9: GEOLOGY; PG: 4; GA: CO2VK; UT: WOS:000359014600015

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