Asymmetry of the mantle structure beneath the Mid-Atlantic Ridge

Details Asymmetry of the mantle structure beneath the Mid-Atlantic Ridge Asymmetry of the mantle structure beneath the Mid-Atlantic Ridge

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19.1165g&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 19, no. 11, June 2, 1992, p. 1165-1168.

Physics

4

Earth Mantle, Models, Ocean Bottom, Ridges, Structural Properties (Geology), Free Convection, Geoids, Satellite Altimetry, Topography

Scientific paper

Altimetry data from repetitive orbits of the GEOSAT satellite are interpreted together with sea-floor depths over the Mid-Atlantic Ridge, South of Iceland and South of the Azores. Geoid/Topography ratios indicate a strong asymmetry of the upper mantle structure in oceanic areas created since 35 My, extending several hundreds kilometers from Iceland to the Azores. A model including interaction between the MAR and two layers of mantle convection seems adequate to produce the observed asymmetry.

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