Meyers, Philip A; Robinson, Rex J (2001): (Table T1) Percentages of CaCO3, TOC, TN, TS of Site 175-1087 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.59445, Supplement to: Meyers, PA; Robinson, RJ (2001): Data report: Carbonate and organic carbon contents of sediments from Site 1087, Southern Cape Basin. In: Wefer, G., Berger, W.H., and Richter, C. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, 175, 1-11, https://doi.org/10.2973/odp.proc.sr.175.211.2001
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Abstract:
Site 1087 is located on the continental rise of southwest Africa at a water depth of 1371 m in the southern part of the Cape Basin. The site is part of the suite of Africa margin locations drilled during Leg 175 to reconstruct the onset and evolution of the elevated biological productivity associated with the Benguela Current upwelling system. Measurements of the amounts of inorganic and organic carbon that have accumulated in sediment under this major coastal upwelling regime are essential to this reconstruction, and these were routinely done for the first 12 sites occupied during Leg 175. However, determinations of calcium carbonate and organic carbon concentrations in sediments from Site 1087 had to be deferred to postcruise analysis because the JOIDES Resolution (JR) entered Cape Town 1 day after completing this site.
Sediment samples were collected at intervals of three per core from Hole 1087A and the lower part of Hole 1087C to provide a survey of the histories of post-Eocene accumulation of calcium carbonate and organic carbon at this site. The samples were freeze-dried on the ship in preparation for subsequent shore-based analysis. Concentrations of calcium carbonate and organic carbon in the sediment samples were measured at the University of Michigan after the cruise. Organic matter atomic C/N ratios were employed to infer the origin of the organic matter contained within the sediments and to explore some of the factors affecting its preservation and accumulation.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -31.464940 * Median Longitude: 15.310880 * South-bound Latitude: -31.465220 * West-bound Longitude: 15.310880 * North-bound Latitude: -31.464660 * East-bound Longitude: 15.310880
Date/Time Start: 1997-10-03T02:10:00 * Date/Time End: 1997-10-06T07:05:00
Minimum DEPTH, sediment/rock: 1.96 m * Maximum DEPTH, sediment/rock: 490.66 m
Event(s):
175-1087A * Latitude: -31.464660 * Longitude: 15.310880 * Date/Time Start: 1997-10-03T02:10:00 * Date/Time End: 1997-10-03T22:25:00 * Elevation: -1371.6 m * Penetration: 255.2 m * Recovery: 252.38 m * Location: Benguela Current, South Atlantic Ocean * Campaign: Leg175 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 27 cores; 255.2 m cored; 0 m drilled; 98.9 % recovery
175-1087C * Latitude: -31.465220 * Longitude: 15.310880 * Date/Time Start: 1997-10-04T02:40:00 * Date/Time End: 1997-10-06T07:05:00 * Elevation: -1371.6 m * Penetration: 491.9 m * Recovery: 478.3 m * Location: Benguela Current, South Atlantic Ocean * Campaign: Leg175 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 53 cores; 491.9 m cored; 0 m drilled; 97.2 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Sample code/label | Sample label | Meyers, Philip A | DSDP/ODP/IODP sample designation | ||
| 3 | Calcium carbonate | CaCO3 | % | Meyers, Philip A | Carbonate bomb (Müller & Gastner, 1971) | |
| 4 | Carbon, organic, total | TOC | % | Meyers, Philip A | Element analyser CNS, Carlo Erba NA1500 | |
| 5 | Nitrogen, total | TN | % | Meyers, Philip A | Element analyser CNS, Carlo Erba NA1500 | |
| 6 | Carbon/Nitrogen ratio | C/N | Meyers, Philip A | Calculated | ||
| 7 | Sulfur, total | TS | % | Meyers, Philip A | Element analyser CNS, Carlo Erba NA1500 |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
845 data points