Mantle helium reveals Southern Ocean hydrothermal venting

Gisela Winckler, Robert Newton, Peter Schlosser, Timothy J. Crone

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Hydrothermal venting along the global mid-ocean ridge system plays a major role in cycling elements and energy between the Earth's interior and surface. We use the distribution of helium isotopes along an oceanic transect at 67S to identify previously unobserved hydrothermal activity in the Pacific sector of the Southern Ocean. Combining the geochemical information provided by the helium isotope anomaly with independent hydrographic information from the Southern Ocean, we trace the source of the hydrothermal input to the Pacific Antarctic Ridge south of 55°S, one of the major global mid-ocean ridge systems, which has until now been a blank spot on the global map of hydrothermal venting. We identify three complete ridge segments, a portion of a fourth segment and two isolated locations on the Pacific Antarctic Ridge between 145W and 175W (representing ∼540 km of ridge in total) as the potential source of the newly observed plume.

Original languageEnglish (US)
Article numberL05601
JournalGeophysical Research Letters
Volume37
Issue number5
DOIs
StatePublished - Mar 1 2010
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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