(Table 1) Geochemistry of surface sediment samples from the Chilean margin
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| Format: | Dataset Open Access |
| Sprache: | en |
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PANGAEA
2000
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| author | Klump, Jens Hebbeln, Dierk Wefer, Gerold |
| author_facet | Klump, Jens Hebbeln, Dierk Wefer, Gerold |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Biogenic barium in marine sediments has been suggested to be a reliable proxy of export productivity from the surface ocean and algorithms have been developed to link these properties. However, problems arise when the proposed algorithms are applied to predominantly terrigenous sediments. A major source of error is incorrect estimates of the terrigenous Ba/Al ratio in normative calculations of the amount of biogenic barium in the sediment. Compared to an often used "global average" Ba/Al ratio, much better results can be obtained by estimating the terrigenous Ba/Al ratio from exponential regression of the Ba/Al ratios of surface sediments obtained from continental slope transects. This method has been applied to surface sediments from the Chilean continental slope. The calculated regional terrigenous Ba/Al ratios could be verified with purely terrigenous samples from Chilean rivers. The resulting accumulation rates of biogenic barium on the Chilean continental slope reliably reproduce the regional pattern of primary productivity in the southern Peru-Chile Current, indicating the potential of biogenic barium as a useful (paleo)productivity proxy. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_787456 |
| institution | PANGAEA |
| language | en |
| publishDate | 2000 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Geochemistry of surface sediment samples from the Chilean margin Klump, Jens Hebbeln, Dierk Wefer, Gerold Aluminium; Barium; Barium, biogenic; Barium/Aluminium ratio; Calcium carbonate; Calculated; CHIPAL; CONDOR-Ia; CTD/Rosette; CTD-RO; DEPTH, sediment/rock; Elevation of event; Event label; GeoB; GeoB3301-1; GeoB3302-2; GeoB3303-1; GeoB3304-3; GeoB3305-2; GeoB3313-3; GeoB3314-1; GeoB3316-1; GeoB3317-6; GeoB3318-2; GeoB3349-4; GeoB3352-2; GeoB3353-1; GeoB3354-1; GeoB3357-1; GeoB3359-1; GeoB3373-1; GeoB3374-1; GeoB3375-2; GeoB3376-2; GeoB3377-1; Geosciences, University of Bremen; Iron; Iron/Aluminium ratio; Latitude of event; Longitude of event; Manganese; MUC; MultiCorer; SO101; SO101/3_1-1; SO101/3_2-2; SO101/3_3-1; SO102/1; SO102/2; Sonne; South-East Pacific Biogenic barium in marine sediments has been suggested to be a reliable proxy of export productivity from the surface ocean and algorithms have been developed to link these properties. However, problems arise when the proposed algorithms are applied to predominantly terrigenous sediments. A major source of error is incorrect estimates of the terrigenous Ba/Al ratio in normative calculations of the amount of biogenic barium in the sediment. Compared to an often used "global average" Ba/Al ratio, much better results can be obtained by estimating the terrigenous Ba/Al ratio from exponential regression of the Ba/Al ratios of surface sediments obtained from continental slope transects. This method has been applied to surface sediments from the Chilean continental slope. The calculated regional terrigenous Ba/Al ratios could be verified with purely terrigenous samples from Chilean rivers. The resulting accumulation rates of biogenic barium on the Chilean continental slope reliably reproduce the regional pattern of primary productivity in the southern Peru-Chile Current, indicating the potential of biogenic barium as a useful (paleo)productivity proxy. |
| title | (Table 1) Geochemistry of surface sediment samples from the Chilean margin |
| topic | Aluminium; Barium; Barium, biogenic; Barium/Aluminium ratio; Calcium carbonate; Calculated; CHIPAL; CONDOR-Ia; CTD/Rosette; CTD-RO; DEPTH, sediment/rock; Elevation of event; Event label; GeoB; GeoB3301-1; GeoB3302-2; GeoB3303-1; GeoB3304-3; GeoB3305-2; GeoB3313-3; GeoB3314-1; GeoB3316-1; GeoB3317-6; GeoB3318-2; GeoB3349-4; GeoB3352-2; GeoB3353-1; GeoB3354-1; GeoB3357-1; GeoB3359-1; GeoB3373-1; GeoB3374-1; GeoB3375-2; GeoB3376-2; GeoB3377-1; Geosciences, University of Bremen; Iron; Iron/Aluminium ratio; Latitude of event; Longitude of event; Manganese; MUC; MultiCorer; SO101; SO101/3_1-1; SO101/3_2-2; SO101/3_3-1; SO102/1; SO102/2; Sonne; South-East Pacific |
| url | https://doi.org/10.1594/PANGAEA.787456 |