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Seafloor evidence for pre-shield volcanism above the Tristan da Cunha mantle plume

Geissler, Wolfram H., Paul Wintersteller, Marcia Maia, Anne Strack, Janine Kammann, Graeme Eagles, Marion Jegen, Antje Schlömer, and Wilfried Jokat (2020), Seafloor evidence for pre-shield volcanism above the Tristan da Cunha mantle plume, Nature Communications, 11(4543).

Abstract
Tristan da Cunha is assumed to be the youngest subaerial expression of the Walvis Ridge hot
spot. Based on new hydroacoustic data, we propose that the most recent hot spot volcanic
activity occurs west of the island. We surveyed relatively young intraplate volcanic fields and
scattered, probably monogenetic, submarine volcanoes with multibeam echosounders and
sub-bottom profilers. Structural and zonal GIS analysis of bathymetric and backscatter
results, based on habitat mapping algorithms to discriminate seafloor features, revealed
numerous previously-unknown volcanic structures. South of Tristan da Cunha, we discovered
two large seamounts. One of them, Isolde Seamount, is most likely the source of a
2004 submarine eruption known from a pumice stranding event and seismological analysis.
An oceanic core complex, identified at the intersection of the Tristan da Cunha Transform
and Fracture Zone System with the Mid-Atlantic Ridge, might indicate reduced magma
supply and, therefore, weak plume-ridge interaction at present times.
Further information
BibTeX
@article{id2621,
  author = {Wolfram H. Geissler and Paul Wintersteller and Marcia Maia and Anne Strack and Janine Kammann and Graeme Eagles and Marion Jegen and Antje Schl{\"o}mer and Wilfried Jokat},
  journal = {Nature Communications},
  month = {sep},
  number = {4543},
  title = {{Seafloor evidence for pre-shield volcanism above the Tristan da Cunha mantle plume}},
  volume = {11},
  year = {2020},
  url = {https://doi.org/10.1038/s41467-020-18361-4},
}
EndNote
%0 Journal Article
%A Geissler, Wolfram H.
%A Wintersteller, Paul
%A Maia, Marcia
%A Strack, Anne
%A Kammann, Janine
%A Eagles, Graeme
%A Jegen, Marion
%A Schlömer, Antje
%A Jokat, Wilfried
%D 2020
%N 4543
%V 11
%J Nature Communications
%T Seafloor evidence for pre-shield volcanism above the Tristan da Cunha mantle plume
%U https://doi.org/10.1038/s41467-020-18361-4
%8 sep
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Printed 22. Oct 2020 23:38