Heat and fluid flux through sediment on the western flank of the Mid‐Atlantic Ridge: A hydrogeological study of North Pond

Marcus G. Langseth, Keir Becker, Richard P. Von Herzen, Peter Schultheiss

Research output: Contribution to journalArticlepeer-review

58 Scopus citations

Abstract

A comprehensive survey of heat flow, sediment thickness and bathymetry in a large intermontane sediment pond on the western flank of the Mid‐Atlantic Ridge (North Pond) shows that only 20 to 25% of the heat escaping from the lithosphere flows through the sediments in the pond even though they completely cover a 70 km2 area of the seafloor. Three in situ pore‐pressure gradient measurements gave values that were negative relative to hydrostatic, indicating that there is drawdown of water through the sediment at rates of 1 to 5 mm/yr. North Pond is a recharge zone for hydrothermal circulation that is probably driven by lateral pressure gradients produced by topographic relief.

Original languageEnglish (US)
Pages (from-to)517-520
Number of pages4
JournalGeophysical Research Letters
Volume19
Issue number5
DOIs
StatePublished - Mar 3 1992

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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