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Auffret, Gérard A; Richter, Thomas; Reyss, Jean-Louis; Organo, C; Deloule, E; Gaillard, Jean-Francois; Dennielou, Bernard; Müller, C; Thomas, B; Watremez, P; Grousset, Francis E; Boelaert, An; Cambon, P; Etoubleau, Joel (1996): Geochemistry of surface sediment samples from the equatorial Atlantic south of the Azores. PANGAEA, https://doi.org/10.1594/PANGAEA.54870, Supplement to: Auffret, GA et al. (1996): Enregistrement de lactivité hydrothermale dans les sédiments de la dorsale médio-atlantique au Sud des Açores. Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science, 323(7), 583-590

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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 deglaciation.
Coverage:
Median Latitude: 37.796545 * Median Longitude: -31.443492 * South-bound Latitude: 37.040000 * West-bound Longitude: -32.570000 * North-bound Latitude: 38.665000 * East-bound Longitude: -29.050000
Date/Time Start: 1993-08-01T00:00:00 * Date/Time End: 1993-08-01T00:00:00
Minimum Elevation: -3050.0 m * Maximum Elevation: -2655.0 m
Event(s):
KB04 * Latitude: 37.860000 * Longitude: -32.570000 * Date/Time: 1993-08-01T00:00:00 * Location: south of Azores * Campaign: GEOFAR * Basis: Le Noroit * Device: Piston corer (PC)
KF01 * Latitude: 37.680000 * Longitude: -32.430000 * Date/Time: 1993-08-01T00:00:00 * Location: south of Azores * Campaign: GEOFAR * Basis: Le Noroit * Device: Piston corer (PC)
KF03 * Latitude: 38.000000 * Longitude: -32.240000 * Date/Time: 1993-08-01T00:00:00 * Location: south of Azores * Campaign: GEOFAR * Basis: Le Noroit * Device: Piston corer (PC)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEvent
2Latitude of eventLatitude
3Longitude of eventLongitude
4Calcium carbonateCaCO3%Auffret, Gérard AElement analysis, neutron activation (NAA)
5ManganeseMn%Auffret, Gérard AElement analysis, neutron activation (NAA)calculated on a carbonate free basis
6IronFe%Auffret, Gérard AElement analysis, neutron activation (NAA)calculated on a carbonate free basis
7ArsenicAsmg/kgAuffret, Gérard AElement analysis, neutron activation (NAA)calculated on a carbonate free basis
8AntimonySbmg/kgAuffret, Gérard AElement analysis, neutron activation (NAA)calculated on a carbonate free basis
9BariumBamg/kgAuffret, Gérard AElement analysis, neutron activation (NAA)calculated on a carbonate free basis
10ScandiumScmg/kgAuffret, Gérard AElement analysis, neutron activation (NAA)calculated on a carbonate free basis
11ChromiumCrmg/kgAuffret, Gérard AElement analysis, neutron activation (NAA)calculated on a carbonate free basis
Size:
199 data points

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