Geochemistry of surface sediment cores (Table 4), supplement to: Kasten, Sabine; Glasby, Geoffrey P; Schulz, Horst D; Friedrich, Günther; Andreev, Sergey I (1998): Rare earth elements in manganese nodules from the South Atlantic Ocean as indicators of oceanic bottom water flow. Marine Geology, 146(1-4), 33-52

DOI

The mineralogy and geochemistry of a suite of nine manganese nodules from the South Atlantic have been determined. The Ce/La ratios of the nodules were investigated to see if they could be used as redox indicators to trace the oxygen content of the ambient water mass and the flow path of the Antarctic Bottom Water as has previously been successfully carried out in the Pacific Ocean. The Ce/La ratios of the nodules decrease in the sequence Lazarev Sea, Weddell Sea (10.4 and 9.7)>East Georgia Basin (6.5 and 7.1)>Argentine Basin (5.0), but then increase in the Brazil Basin (6.2) and Angola Basin (9.8 and 15.1). A further decrease was observed in the Cape Basin (7.6). An extremely high Ce/La ratio of 24.4 had already been determined for nodules sampled north of the Nares Abyssal Plain in the western North Atlantic. These data reflect the more complicated pattern of bottom water flow in the South Atlantic than in the South Pacific. The penetration of more oxygenated North Atlantic Deep Water into the South Atlantic accounts for the higher Ce/La ratios in the nodules from the Angola and Brazil basins. Based on this study, the flow path of the Antarctic Bottom Water could only be traced as far north as the Argentine Basin. The unique geochemistry of nodules from the central Angola Basin (high Mn/Fe and Ce/La ratios, high contents of Ni, Cu, Zn and Mo) appears to be a function of the nature of the overlying water mass and of the multiple diagenetic sources of metals to the nodules.

Identifier
DOI https://doi.org/10.1594/PANGAEA.54795
Related Identifier https://doi.org/10.1016/S0025-3227(97)00128-X
Related Identifier https://nbn-resolving.org/urn:nbn:de:gbv:46-ep000102114
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.54795
Provenance
Creator Kasten, Sabine; Glasby, Geoffrey P; Schulz, Horst D; Friedrich, Günther; Andreev, Sergey I
Publisher PANGAEA - Data Publisher for Earth & Environmental Science
Publication Year 1998
Rights Creative Commons Attribution 3.0 Unported
OpenAccess true
Representation
Language English
Resource Type Supplementary Dataset
Format text/tab-separated-values
Size 220 data points
Discipline Earth System Research
Spatial Coverage (-41.432W, -65.173S, 10.292E, -8.917N); Walvis Ridge; Cape Basin; Brazil Basin; Santos Plateau; Lazarev Sea; Weddell Sea; South Atlantic Ocean
Temporal Coverage Begin 1988-03-07T00:00:00Z
Temporal Coverage End 1994-08-02T00:00:00Z