Enregistrement de l'activité hydrothermale dans les sédiments de la dorsale médio-atlantique au Sud des Açores

Translated title of the contribution: Record of hydrothermal activity in sediments from the Mid-Atlantic Ridge south of the Azores

Gérard A. Auffret*, Thomas Richter, Jean Louis Reyss, Catherine Organo, Etienne Deloule, Jean François Gaillard, Bernard Dennielou, Caria Müller, Bertrand Thomas, Pierre Watremez, Francis Grousset, An Boelaert, Pierre Cambon, Joël Etoubleau

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

In order to recognize the distribution of hydrothermal tracers south of the Azores, a series of cores has been sampled during the GEOFAR cruise. The distribution of the Mn concentrations shows that the hydrothermal influence is maximum within and to the north-west of the Lucky Strike segment. North of the East-Azores Fracture Zone the sediments are enriched in Ba which could be derived from different sources. The chemical composition of the interstitial water shows that water advection is limited. Mn, Cu, Ni fluxes evaluated in one site have increased during isotopic stages 4 and 2 and the déglaciation. Keyword: Sediment, Hydrothermalism, Paleoceanography, Iron, Manganese, Barium, Arsenic.

Translated title of the contributionRecord of hydrothermal activity in sediments from the Mid-Atlantic Ridge south of the Azores
Original languageFrench
Pages (from-to)583-590
Number of pages8
JournalComptes Rendus de l'Academie de Sciences - Serie IIa: Sciences de la Terre et des Planetes
Volume323
Issue number7
StatePublished - Dec 1 1996

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ocean Engineering

Fingerprint Dive into the research topics of 'Record of hydrothermal activity in sediments from the Mid-Atlantic Ridge south of the Azores'. Together they form a unique fingerprint.

Cite this