Tarafa, Martha; Whelan, Jean K; Mountain, Gregory S (1987): Epoch, organic carbon and compounds at DSDP Holes 93-605 and 95-613 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.788533, Supplement to: Tarafa, M et al. (1987): Sediment slumps in the Middle and Lower Eocene of Deep Sea Drilling Project Holes 605 and 613: Chemical detection by pyrolysis techniques. In: Poag, CW; Watts, AB; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 95, 661-669, https://doi.org/10.2973/dsdp.proc.95.129.1987
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Abstract:
Twenty-four sediment samples from DSDP Holes 605 (Leg 93) and 613 (Leg 95) on the New Jersey continental rise were analyzed by pyrolysis-gas chromatography. Twelve of these samples were also analyzed by pyrolysis-gas chromatography/mass spectrometry. The degree of preservation of sediment organic matter, as determined by these techniques, helped to distinguish slumped sediments from sediments that have not moved from their original place of deposition. Total levels of pyrolyzable organic material, as determined from pyrolysis-gas chromatography, were low in sediments that were not slumped, indicating that the organic material is highly degraded. Nitrogen- and oxygen-containing compounds were the primary compounds detected by gas chromatography/mass spectrometry (GCMS) analysis of the pyrolyzate of non-slumped sediments. Smaller amounts of aromatic compounds and branched alkanes were also present in some of these samples. In contrast, slumped sediments showed larger amounts of pyrolyzable organic matter, as determined from pyrolysis-gas chromatography, and better preservation of alkyl chains in the sediment organic matter, as suggested by the presence of n-alkanes in GCMS analysis of the pyrolyzate. Better preservation of the organic matter in slumped sediments can be attributed to more moderate bioturbation by bottom-dwelling organisms at the original deposition site.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 38.756600 * Median Longitude: -72.566500 * South-bound Latitude: 38.742200 * West-bound Longitude: -72.609200 * North-bound Latitude: 38.771000 * East-bound Longitude: -72.523800
Date/Time Start: 1983-06-11T00:00:00 * Date/Time End: 1983-09-17T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets
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Datasets listed in this publication series
- Tarafa, M; Whelan, JK; Mountain, GS (1987): (Table 3) Compounds found in pyrolysis-GCMS at DSDP Holes 93-605 and 95-613. https://doi.org/10.1594/PANGAEA.788532
- Tarafa, M; Whelan, JK; Mountain, GS (1987): (Table 1) Organic carbon and epoch at DSDP Hole 93-605. https://doi.org/10.1594/PANGAEA.788529
- Tarafa, M; Whelan, JK; Mountain, GS (1987): (Table 2) Organic carbon and epoch at DSDP Hole 95-613. https://doi.org/10.1594/PANGAEA.788530