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Seifert, Richard; Michaelis, Walter (1991): Organic compounds in sediments and pore waters of ODP Sites 117-723 and 117-724 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.757194, Supplement to: Seifert, R; Michaelis, W (1991): Organic compounds in sediments and pore waters of Sites 723 and 724. In: Prell, WL; Niitsuma, N; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 117, 529-545, https://doi.org/10.2973/odp.proc.sr.117.156.1991

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Abstract:
Total organic carbon, amino compounds, and carbohydrates were measured in pore waters and sediments of Pliocene to Pleistocene age from Sites 723 and 724 (ODP Leg 117) to evaluate (1) relationships between organic matter in the sediment and in the pore water, (2) the imprint of lithological variations on the abundance and contribution of organic substances, (3) degradation of amino compounds and carbohydrates with time and/or depth, and (4) the dependence of the ammonia concentration in the pore water on the degradation of amino compounds in the sediment.
Total organic carbon concentrations (TOC) of the investigated sediment samples range from 0.9% to 8.7%, and total nitrogen concentrations (TN) from 0.1% to 0.5%. Up to 4.9% of the TOC is contributed by hydrolyzable amino acids (THAA) which are present in amounts between 1.1 and 21.3 µmol/g dry sediment and decrease strongly downhole. Hydrolyzable carbohydrates (THCHO) were found in concentrations from 1.3 to 6.6 ?mol/g sediment constituting between 0.1% and 2.0% of the TOC. Differences between the distribution patterns of monomers in Sites 723 and 724 indicate higher terrigenous influence for Site 724 and, furthermore, enhanced input of organic matter that is relatively resistant to microbial degradation. Lithologically distinct facies close to the Pliocene/Pleistocene boundary yield different organic matter compositions. Laminated horizons seem to correspond with enhanced amounts of biogenic siliceous material and minor microbiological degradation.
Total amounts of dissolved organic carbon (DOC) in pore waters vary between 11 and 131 mg/L. Concentrations of DOC as well as of dissolved amino compounds and carbohydrates appear to be related to microbial activity and/or associated redox zones and not so much to the abundance of organic matter in the sediments. Distributions of amino acids and monosaccharides in pore waters show a general enrichment in relatively stable components in comparison to those of the sediments. Nevertheless, the same trend appears between amino acids present in the sediments from Sites 723 and 724 as well as between amino acids in pore waters from these two sites, indicating a direct relation between the dissolved and the sedimentary organic fractions.
Different ammonia concentrations in the pore waters of Sites 723 and 724 seem to be related to enhanced release of ammonia from degradation of amino compounds in Site 723.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 18.238482 * Median Longitude: 57.689428 * South-bound Latitude: 18.051800 * West-bound Longitude: 57.608100 * North-bound Latitude: 18.462500 * East-bound Longitude: 57.786500
Date/Time Start: 1987-09-15T00:00:00 * Date/Time End: 1987-09-21T00:00:00
Event(s):
117-723 * Latitude: 18.051800 * Longitude: 57.608700 * Date/Time Start: 1987-09-15T00:00:00 * Date/Time End: 1987-09-20T00:00:00 * Elevation: -816.3 m * Penetration: 938.1 m * Recovery: 676.3 m * Location: Arabian Sea * Campaign: Leg117 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 98 cores; 909.2 m cored; 0 m drilled; 74.4% recovery
117-723A * Latitude: 18.051800 * Longitude: 57.609000 * Date/Time Start: 1987-09-15T11:45:00 * Date/Time End: 1987-09-17T04:30:00 * Elevation: -806.0 m * Penetration: 432.3 m * Recovery: 298.29 m * Location: Arabian Sea * Campaign: Leg117 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 46 cores; 432.3 m cored; 0 m drilled; 69 % recovery
117-723B * Latitude: 18.051800 * Longitude: 57.608100 * Date/Time Start: 1987-09-17T04:30:00 * Date/Time End: 1987-09-19T14:15:00 * Elevation: -817.0 m * Penetration: 429 m * Recovery: 295.84 m * Location: Arabian Sea * Campaign: Leg117 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 44 cores; 400.1 m cored; 0 m drilled; 73.9 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
11 datasets

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Datasets listed in this publication series

  1. Seifert, R; Michaelis, W (1991): (Table 9) Amino acids and amino sugars in interstitial waters of ODP Site 117-723. https://doi.org/10.1594/PANGAEA.757191
  2. Seifert, R; Michaelis, W (1991): (Table 5) Amino acids and amino sugars in sediments of ODP Site 117-723. https://doi.org/10.1594/PANGAEA.757186
  3. Seifert, R; Michaelis, W (1991): (Table 11) Carbohydrates in interstitial waters of ODP Site 117-723. https://doi.org/10.1594/PANGAEA.757193
  4. Seifert, R; Michaelis, W (1991): (Table 7) Carbohydrates in sediments of ODP Site 117-723. https://doi.org/10.1594/PANGAEA.757189
  5. Seifert, R; Michaelis, W (1991): (Table 3) Organic chemistry of interstitial waters of ODP Site 117-723. https://doi.org/10.1594/PANGAEA.757184
  6. Seifert, R; Michaelis, W (1991): (Table 1) Organic chemistry of sediments of ODP Site 117-723. https://doi.org/10.1594/PANGAEA.757182
  7. Seifert, R; Michaelis, W (1991): (Table 10) Amino acids and amino sugars in interstitial waters of ODP Site 117-724. https://doi.org/10.1594/PANGAEA.757192
  8. Seifert, R; Michaelis, W (1991): (Table 6) Amino acids and amino sugars in sediments of ODP Site 117-724. https://doi.org/10.1594/PANGAEA.757188
  9. Seifert, R; Michaelis, W (1991): (Table 8) Carbohydrates in sediments of ODP Site 117-724. https://doi.org/10.1594/PANGAEA.757190
  10. Seifert, R; Michaelis, W (1991): (Table 4) Organic chemistry of interstitial waters of ODP Site 117-724. https://doi.org/10.1594/PANGAEA.757185
  11. Seifert, R; Michaelis, W (1991): (Table 2) Organic chemistry of sediments of ODP Site 117-724. https://doi.org/10.1594/PANGAEA.757183