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Cooke, M P; Talbot, Helen M; Wagner, Thomas (2008): Bacteriohopanepolyol biomarkers of sediments from the Congo fan [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.757489, Supplement to: Cooke, MP et al. (2008): Tracking soil organic carbon transport to continental margin sediments using soil-specific hopanoid biomarkers: A case study from the Congo fan (ODP site 1075). Organic Geochemistry, 39(8), 965-971, https://doi.org/10.1016/j.orggeochem.2008.03.009

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Abstract:
The transport and deposition of terrestrially derived organic matter (TOM) into the ocean is an important but poorly constrained aspect of the modern global carbon cycle. A preliminary study of Late Quaternary sediments from the Congo deep sea fan (ODP leg 175, site 1075, 2 km water depth) and four surface samples from associated cores has confirmed the presence of proposed soil-specific bacteriohopanepolyol biomarkers (BHPs) including adenosylhopane, in samples to a depth of 89 m. Concentrations of soil marker BHPs are high in the upper sediment section (to 49 m) and the closest related surface sample (4913), supporting the case for these molecular markers as novel proxies for soil organic carbon (SOC) supply via riverine transport and subsequent burial. Distinct peaks for the markers at about 21, 34 and 60 m below surface level tentatively imply that the rate of TOM discharge from tropical Africa significantly increased at these times, possibly associated with periods of reduced soil stability in the Congo catchment.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -4.639405 * Median Longitude: 9.969052 * South-bound Latitude: -11.906667 * West-bound Longitude: 6.731667 * North-bound Latitude: 2.680000 * East-bound Longitude: 13.073333
Date/Time Start: 1997-08-23T00:00:00 * Date/Time End: 1998-03-11T10:07:00
Event(s):
175-1075 * Latitude: -4.785333 * Longitude: 10.075056 * Date/Time: 1997-08-23T00:00:00 * Elevation: -2995.5 m * Penetration: 612.7 m * Recovery: 642.2 m * Location: Benguela Current, South Atlantic Ocean * Campaign: Leg175 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 66 cores; 612.7 m cored; 0 m drilled; 104.8% recovery
GeoB4901-2 * Latitude Start: 2.680000 * Longitude Start: 6.731667 * Latitude End: 2.680000 * Longitude End: 6.733333 * Date/Time Start: 1998-02-25T20:08:00 * Date/Time End: 1998-02-26T17:45:00 * Elevation: -2184.0 m * Location: Eastern Niger fan * Campaign: M41/1 * Basis: Meteor (1986) * Method/Device: PROFILUR Lander (PROFILUR)
GeoB4909-7 * Latitude Start: -2.073333 * Longitude Start: 8.625000 * Latitude End: -2.071667 * Longitude End: 8.630000 * Date/Time Start: 1998-03-04T05:47:00 * Date/Time End: 1998-03-05T10:38:00 * Elevation: -1317.0 m * Location: off Gabun * Campaign: M41/1 * Basis: Meteor (1986) * Method/Device: PROFILUR Lander (PROFILUR)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets

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Datasets listed in this publication series

  1. Cooke, MP; Talbot, HM; Wagner, T (2008): (Table 3) Bacteriohopanepolyol biomarkers in ODP Site 175-1075. https://doi.org/10.1594/PANGAEA.757488
  2. Cooke, MP; Talbot, HM; Wagner, T (2008): (Table 2) Bacteriohopanepolyol biomarkers in surface sediments of the Congo fan. https://doi.org/10.1594/PANGAEA.757486