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Asymmetry of the mantle structure beneath the Mid‐Atlantic Ridge
Author(s) -
Goslin Jean,
Aslanian Daniel
Publication year - 1992
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/92gl00918
Subject(s) - geology , geoid , mantle (geology) , ridge , asymmetry , mid atlantic ridge , altimeter , mid ocean ridge , mantle convection , geophysics , geodesy , seismology , subduction , paleontology , tectonics , physics , quantum mechanics , measured depth
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.