Klump, Jens; Hebbeln, Dierk; Wefer, Gerold (2000): (Table 1) Geochemistry of surface sediment samples from the Chilean margin [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.787456, Supplement to: Klump, J et al. (2000): The impact of sediment provenance on barium-based productivity estimates. Marine Geology, 169(3-4), 259-271, https://doi.org/10.1016/S0025-3227(00)00092-X
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Abstract:
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.
Related to:
Hebbeln, Dierk; Marchant, Margarita; Freudenthal, Tim; Wefer, Gerold (2000): Surface sediment distribution along the Chilean continental slope related to upwelling and productivity. Marine Geology, 164(3-4), 119-137, https://doi.org/10.1016/S0025-3227(99)00129-2
Project(s):
Coverage:
Median Latitude: -34.415079 * Median Longitude: -72.974841 * South-bound Latitude: -42.038333 * West-bound Longitude: -75.321667 * North-bound Latitude: -27.466667 * East-bound Longitude: -71.171667
Date/Time Start: 1995-04-25T00:00:00 * Date/Time End: 1995-06-08T00:00:00
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m
Event(s):
GeoB3301-1 (SO101/3_1-1) * Latitude: -33.146667 * Longitude: -71.981667 * Date/Time: 1995-04-25T00:00:00 * Elevation: -969.0 m * Location: South-East Pacific * Campaign: SO101 (CONDOR-Ia) * Basis: Sonne * Method/Device: MultiCorer (MUC) * Comment: not released
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Elevation of event | Elevation | m | |||
| 5 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 6 | Barium | Ba | mg/kg | Klump, Jens | ||
| 7 | Aluminium | Al | mg/kg | Klump, Jens | ||
| 8 | Barium/Aluminium ratio | Ba/Al | Klump, Jens | |||
| 9 | Iron | Fe | mg/kg | Klump, Jens | ||
| 10 | Iron/Aluminium ratio | Fe/Al | Klump, Jens | |||
| 11 | Manganese | Mn | mg/kg | Klump, Jens | ||
| 12 | Barium, biogenic | Ba bio | mg/kg | Klump, Jens | Calculated | using regional terrigenous Ba/Al ratios |
| 13 | Barium, biogenic | Ba bio | mg/kg | Klump, Jens | Calculated | using an average crustal Ba/Al ratio |
| 14 | Calcium carbonate | CaCO3 | % | Klump, Jens | previously published by Hebbeln et al., 2000 |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
189 data points