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  • 117-722A; 117-722B; 117-723A; 117-728A; Arabian Sea; DRILL; Drilling/drill rig; Indian Ocean; Joides Resolution; Leg117; Ocean Drilling Program; ODP; PC; Piston corer; RC27; RC27-09; RC27-12; RC27-14; RC27-23; RC27-24; Robert Conrad  (1)
  • 63-467; 64-481A; 75-530A; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg63; Leg64; Leg75; North Pacific/GAP; North Pacific/Gulf of California/BASIN; South Atlantic/RIDGE  (1)
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  • 1
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    Unknown
    C1-C8 hydrocarbons in marine sediments
    PANGAEA
    In:  Supplement to: Whelan, Jean K; Hunt, John M; Jasper, John P; Huc, Alain Y (1984): Migration of C1-C8 hydrocarbons in marine sediment. Organic Geochemistry, 6, 683-694, https://doi.org/10.1016/0146-6380(84)90089-5
    Details
    Publication Date: 2023-06-27
    Description: Light hydrocarbon (C1-C8) profiles are compared for three wells of varying maturities: two immature DSDP wells (Site 397 near the Canary Islands and Site 530A near the Walvis Ridge in the south-east Atlantic) and a mature well, the East Cameron well in the Texas Gulf Coast. Primary migration of C1 and C2 appears to be occurring in all of the sedimentary rocks examined. Primary migration of C3+ components becomes important only as fine-grained sedimentary rocks enter the catagenetic hydrocarbon generation zone or over short distances in more permeable sections. Lateral migration along bedding planes was more important than vertical migration in sedimentary rocks of all maturities. The lightest (methane, ethane and propane gases) hydrocarbon show greater fractionation than do the C4-C8 alkanes which generally show minimal fractionation during the migrational process. Subsurface diffusion coefficients for these p.p.b. quantities of C2-C5 alkanes from immature sediments from DSDP Site 530 are estimated to be several orders of magnitude less than values reported in the literature for diffusion of much larger amounts of these compounds from mature water wet sediments into air or sandstones. Since our calculations suggest light hydrocarbons are present in amounts less than their reported solubilities in pure water at 25°C, we postulate that the sediment organic matter has a substantial effect on retarding the movement of these light hydrocarbons.
    Keywords: 63-467; 64-481A; 75-530A; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg63; Leg64; Leg75; North Pacific/GAP; North Pacific/Gulf of California/BASIN; South Atlantic/RIDGE
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
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    Unknown
    Hydrocarbons of sediments of the Oman shelf (1991)
    PANGAEA
    In:  Supplement to: Emeis, Kay-Christian; Whelan, Jean K (1991): Pyrolytic character of organic matter in Cenozoic sediments on the Oman shelf. In: Prell, WL; Niitsuma, N; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 117, 547-560, https://doi.org/10.2973/odp.proc.sr.117.158.1991
    Details
    Publication Date: 2024-01-09
    Description: Analysis of the molecular composition and quantity of pyrolytic hydrocarbons in 41 samples from Owen Ridge and the Oman margin enabled us to identify chemical differences in the organic matter from Owen Ridge and the Oman margin. The differences may be attributed to regional variability in organic matter composition between margin and ridge, effects of kerogen formation and condensation with age, and effects of changes in the depositional environment on the Oman margin. Pyrolytic hydrocarbons from ridge sediments are relatively more enriched in heterocompounds, aromatic molecules, and '-alkanes and n-monoalkenes in the range n-C9 to n-C14 when compared to margin sediments. This may be indicative of input of degraded organic material on Owen Ridge and less degraded material on the Oman margin. Increases of long-chain n-alkanes and rt-monoalkenes with depth in sediments from the Oman margin are a result of the concentration of precursor moieties in the kerogen during low-temperature diagenesis. Differences in the depositional environment during deposition of sediments on the Oman margin (changes in the oxygen content of bottom waters and changing benthic activity in a variable oxygen minimum zone) appear to be mirrored in the distribution of monounsaturated isoprenoid hydrocarbons prist-1-ene and prist-2-ene and alkylbenzene.
    Keywords: 117-722A; 117-722B; 117-723A; 117-728A; Arabian Sea; DRILL; Drilling/drill rig; Indian Ocean; Joides Resolution; Leg117; Ocean Drilling Program; ODP; PC; Piston corer; RC27; RC27-09; RC27-12; RC27-14; RC27-23; RC27-24; Robert Conrad
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    DATA PANGAEA
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