2003
DOI: 10.1029/2003gc000527
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Interaction between the Mid‐Atlantic Ridge and the Azores hot spot during the last 85 Myr: Emplacement and rifting of the hot spot‐derived plateaus

Abstract: [1] Multiple-and single-beam bathymetric data are compiled over the Azores plateau to produce a 1 km  1 km grid between latitudes 32°N and 49°N and longitudes 22°W and 43°W. Mantle Bouguer anomalies are then calculated from this grid and the satellite-derived gravity. These grids provide new insights on the temporal and spatial variations of melt supply to the ridge axis. The elevated seafloor of the Azores plateau is interpreted as resulting from the interaction of a mantle plume with the Mid-Atlantic Ridge … Show more

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Cited by 146 publications
(141 citation statements)
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References 90 publications
(170 reference statements)
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“…3), that is, the depth of the interface is generally shallower beneath the islands closer to the MAR (35-55 km, 5-6.5 s delay time) and deepens with increasing distance to the MAR (∼85 km, ∼9 s delay time). Our results also agree with previous geophysical and geochemical studies which estimated the LAB depth to deepen from ∼35-40 km under the Western and Central Islands to ∼70-80 km under São Miguel and Santa Maria (Gente et al 2003;Silveira et al 2010;Genske et al 2012). There are, however, some ambiguous results at the islands of Terceira and Santa Maria that warrant closer inspection.…”
Section: Lithosphere-asthenosphere Boundarysupporting
confidence: 81%
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“…3), that is, the depth of the interface is generally shallower beneath the islands closer to the MAR (35-55 km, 5-6.5 s delay time) and deepens with increasing distance to the MAR (∼85 km, ∼9 s delay time). Our results also agree with previous geophysical and geochemical studies which estimated the LAB depth to deepen from ∼35-40 km under the Western and Central Islands to ∼70-80 km under São Miguel and Santa Maria (Gente et al 2003;Silveira et al 2010;Genske et al 2012). There are, however, some ambiguous results at the islands of Terceira and Santa Maria that warrant closer inspection.…”
Section: Lithosphere-asthenosphere Boundarysupporting
confidence: 81%
“…Schilling 1975;Gente et al 2003). The development of the plateau is inferred to have occurred mainly between 20 and 7 Ma, and was followed by significant post-volcanic tectonic rifting (Gente et al 2003;Luis & Miranda 2008). Whilst being stretched along the MAR, the plateau has been split into a smaller western and larger eastern sector.…”
Section: Introductionmentioning
confidence: 99%
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“…Plate reconstructions indicate that the largest known oceanic LIP, the Ontong Java-Hikurangi-Manihiki LIP also formed at a triple junction (Taylor, 2006;Chandler et al, 2012;Hochmuth et al, 2015). The same can be said of the next largest oceanic LIP, the Indian Ocean's Kerguelen Plateau (Royer et al, 1991), and the Azores Plateau (Gente et al, 2003) in the Atlantic. In addition, it has been noted that many oceanic hotspots have erupted at spreading ridges (Whittaker et al, 2015).…”
Section: Plume and Plate?mentioning
confidence: 80%