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Schefuß, Enno; Versteegh, Gerard J M; Jansen, J H Fred; Sinninghe Damsté, Jaap S (2001): Marine and terrigenous lipids in ODP Leg 175 holes. PANGAEA, https://doi.org/10.1594/PANGAEA.735567, Supplement to: Schefuß, E et al. (2001): Marine and terrigenous lipids in southeast Atlantic sediments (Leg 175) as paleoenvironmental indicators: Initial results. In: Wefer, G; Berger, WH; Richter, C (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 175, 1-23, https://doi.org/10.2973/odp.proc.sr.175.228.2001

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Abstract:
Lipid compositions of sediments recovered during Ocean Drilling Program Leg 175 in the eastern South Atlantic reflect a variety of oceanographic and climatological environments. Most of the identified lipids can be ascribed to marine sources, notably haptophytes, eustigmatophytes, dinoflagellates, archaea, and diatoms. Elevated concentrations of cholesterol suggest zooplankton herbivory, characteristic for sites influenced by upwelling. At these sites, sulfurized highly branched isoprenoids from diatoms are also present in high amounts. Sterols, sterol ethers, hopanoids, and midchain hydroxy fatty acids could also be detected. Terrigenous lipids are n-alkanes, fatty acids, n-alcohols, and triterpenoid compounds like taraxerol and -amyrine. n-Alkanes, fatty acids, and n-alcohols are derived from leaf waxes of higher land plants and transported to the sea by airborne dust or fresh water. Triterpenoid compounds are most probably derived from mangroves and transported solely by rivers. Lipid compositions below the Congo low-salinity plume are strongly influenced by terrigenous material from the Congo River. Elevated organic carbon contents and predominantly marine lipid distributions at the Angola margin may indicate a highly productive plankton population, probably sustained by the Angola Dome. Sedimentary lipids in the Walvis Basin contain an upwelling signal, likely transported by the Benguela Current. Sedimentary lipids off Lüderitz Bay and in the southern Cape Basin are dominated by plankton lipids in high to intermediate amounts, reflecting persistent and seasonal upwelling, respectively.
Project(s):
Coverage:
Median Latitude: -17.071538 * Median Longitude: 12.359851 * South-bound Latitude: -29.374410 * West-bound Longitude: 10.436580 * North-bound Latitude: -5.068830 * East-bound Longitude: 13.990110
Date/Time Start: 1997-08-26T23:38:00 * Date/Time End: 1997-09-29T18:15:00
Event(s):
175-1076A * Latitude: -5.068830 * Longitude: 11.101520 * Date/Time Start: 1997-08-26T23:38:00 * Date/Time End: 1997-08-27T18:30:00 * Elevation: -1404.2 m * Penetration: 204.3 m * Recovery: 217.47 m * Location: Benguela Current, South Atlantic Ocean * Campaign: Leg175 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 22 cores; 204.3 m cored; 0 m drilled; 106.4 % recovery
175-1077A * Latitude: -5.179940 * Longitude: 10.436580 * Date/Time Start: 1997-08-29T05:34:00 * Date/Time End: 1997-08-30T11:30:00 * Elevation: -2380.0 m * Penetration: 204.5 m * Recovery: 209.19 m * Location: Benguela Current, South Atlantic Ocean * Campaign: Leg175 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 22 cores; 204.5 m cored; 0 m drilled; 102.3 % recovery
175-1079A * Latitude: -11.929610 * Longitude: 13.309050 * Date/Time Start: 1997-09-04T16:04:00 * Date/Time End: 1997-09-05T03:55:00 * Elevation: -737.9 m * Penetration: 121 m * Recovery: 124.61 m * Location: Benguela Current, South Atlantic Ocean * Campaign: Leg175 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 14 cores; 121 m cored; 0 m drilled; 103 % recovery
Size:
2 datasets

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