Scientific article
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Géochimie isotopique des basaltes de la ride médio-océanique de l'Atlantique Equatorial

Other titleIsotope geochemistry of mid ocean ridge basalts of the equatorial Atlantic
Publication date1992

A major, 1000-km long geochemical anomaly culminating at 1.7°N is observed in basalts erupted along the axis of the Mid-Atlantic Ridge across the Equatorial fracture zones. The anomaly is probably caused by the Sierra Leone mantle plume now in off-ridge position. The aseismic Sierra Leone and Ceara Rise reflect the activity of this hotspot in the past, when it was centered over the ridge axis.

  • Pb-Sr-Nd isotopes
  • MOR basalts
  • Mid-Atlantic ridge
  • Mantle plumes.
Citation (ISO format)
FONTIGNIE, Denis André, SCHILLING, Jean-Guy, HANAN, B.B. Géochimie isotopique des basaltes de la ride médio-océanique de l’Atlantique Equatorial. In: Schweizerische mineralogische und petrographische Mitteilungen, 1992, vol. 72, n° 1, p. 123–127. doi: 10.5169/seals-54901
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Article (Published version)
ISSN of the journal0036-7699

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