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Coral Patch and Ormonde seamounts as a product of the Madeira hotspot, Eastern Atlantic Ocean
Author(s) -
D'Oriano Filippo,
Angeletti Lorenzo,
Capotondi Lucilla,
Laurenzi Marinella A.,
López Correa Matthias,
Taviani Marco,
Torelli Luigi,
Trua Teresa,
Vigliotti Luigi,
Zitellini Nevio
Publication year - 2010
Publication title -
terra nova
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.353
H-Index - 89
eISSN - 1365-3121
pISSN - 0954-4879
DOI - 10.1111/j.1365-3121.2010.00973.x
Subject(s) - seamount , geology , bathymetry , hotspot (geology) , oceanography , lava , seafloor spreading , paleontology , pelagic zone , volcanism , coral , terrigenous sediment , volcano , tectonics , sedimentary rock , seismology
Terra Nova, 22, 494–500, 2010 Abstract New detailed swath bathymetry and bottom samples from Coral Patch and Ormonde seamounts provide constraints on the emplacement of the Madeira hotspot in the Eastern Atlantic Ocean. Swath bathymetric data document that Coral Patch is a composite structure, made up of at least nine distinct volcanic centres. Lithified pelagic carbonates infilling fissures in lava blocks constrain a minimal age for the volcanism in the Early Miocene and represent the first documentation of Coral Patch acting as an offshore terrigenous‐starved seamount. At Coral Patch, as already observed at the Ormonde seamount, volcanism was emplaced on top of a pre‐existing relief resulting from the regional tectonic compressive regime.