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Whiticar, Michael J; Faber, Eckhard (1989): Molecular and stable isotope composition of headspace and total hydrogencarbon gases of ODP Leg 104 sites [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.736728, Supplement to: Whiticar, MJ; Faber, E (1989): Molecular and stable isotope composition of headspace and total hydrocarbon gases at ODP Leg 104, Sites 642, 643, and 644, Vøring Plateau, Norwegian Sea. In: Eldholm, O; Thiede, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 104, 327-334, https://doi.org/10.2973/odp.proc.sr.104.127.1989

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Abstract:
Molecular and isotope compositions of headspace and total (free + sorbed) hydrocarbon gases from drilled cores of the three ODP Leg 104 Sites 642, 643, and 644 of the Voring Plateau are used to characterize the origin and distribution of these gases in Holocene to Eocene sediments. Only minor amounts of methane were found in the headspace (0.1 to < 0.001 vol%). Although methane through propane are present in all of the total gas samples, different origins account for the concentration and composition variations found.
Site 643 at the foot of the outer Voring Plateau represents a geological setting with poor hydrocarbon generating potential, (sediments with low TOC and maturity overlying oceanic basement). Correspondingly, the total gas concentrations are low, typical for background gases (yield C1 - 4 = 31 to 232 ppb, C1/C2+ = 0.6 to 4; delta13C(CH4) -22 per mil to -42 per mil) probably of a diagenetic origin.
Holocene to Eocene sediments, which overlie volcanic units, were drilled on the outer Vdring Plateau, at Holes 642B and D. Similar to Site 643, these sediments possess a poor hydrocarbon generating potential. The total gas character (yield C1 - 4 = 20 to 410 ppb; C1/C2+ = 1.7 to 13.3; delta13C(CH4) ca. -23 per mil to -40 per mil) again indicates a diagenetic origin, perhaps with the addition of some biogenic gas. The higher geothermal gradient and the underlying volcanics do not appear to have any influence on the gas geochemistry.
The free gas (Vacutainer TM) in the sediments at Site 644 are dominated by biogenic gas (C1/C2+ > 104; delta13C(CH4) -77 per mil). Indications, in the total gas, of hydrocarbons with a thermogenic signature (yield C1 - 4 = 121 to 769 ppb, C1/ C2+ = 3 to 8; delta13C(CH4) = -39 per mil to -71 per mil), could not be unequivocally confirmed as such. Alternatively, these gases may represent mixtures of diagenetic and biogenic gases.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 67.205267 * Median Longitude: 2.846383 * South-bound Latitude: 66.678300 * West-bound Longitude: 1.033300 * North-bound Latitude: 67.715000 * East-bound Longitude: 4.576700
Date/Time Start: 1985-06-28T14:40:00 * Date/Time End: 1985-08-09T10:15:00
Event(s):
104-642B * Latitude: 67.225000 * Longitude: 2.928300 * Date/Time Start: 1985-06-28T14:40:00 * Date/Time End: 1985-06-29T20:15:00 * Elevation: -1294.0 m * Penetration: 221.1 m * Recovery: 214.61 m * Location: Norwegian Sea * Campaign: Leg104 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 25 cores; 221.1 m cored; 0 m drilled; 97.1 % recovery
104-642D * Latitude: 67.220000 * Longitude: 2.930000 * Date/Time Start: 1985-07-01T15:00:00 * Date/Time End: 1985-07-04T00:10:00 * Elevation: -1292.0 m * Penetration: 329.9 m * Recovery: 114.58 m * Location: Norwegian Sea * Campaign: Leg104 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 19 cores; 140 m cored; 0 m drilled; 81.8 % recovery
104-643A * Latitude: 67.715000 * Longitude: 1.033300 * Date/Time Start: 1985-08-03T06:07:00 * Date/Time End: 1985-08-08T01:45:00 * Elevation: -2780.0 m * Penetration: 565.2 m * Recovery: 458.29 m * Location: Norwegian Sea * Campaign: Leg104 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 62 cores; 565.2 m cored; 0 m drilled; 81.1 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
9 datasets

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Datasets listed in this publication series

  1. Whiticar, MJ; Faber, E (1989): (Table 1) Hydrocarbon composition of headspace and Vacutainer gases of the samples from ODP Site 104-642B. https://doi.org/10.1594/PANGAEA.736721
  2. Whiticar, MJ; Faber, E (1989): (Table 2) Total hydrocarbon gas yields of samples from ODP Site 104-642. https://doi.org/10.1594/PANGAEA.736724
  3. Whiticar, MJ; Faber, E (1989): (Table 3) Relative hydrocarbon percentage and isotope composition of samples from ODP Site 104-642. https://doi.org/10.1594/PANGAEA.736727
  4. Whiticar, MJ; Faber, E (1989): (Table 1) Hydrocarbon composition of headspace and Vacutainer gases of the samples from ODP Hole 104-643A. https://doi.org/10.1594/PANGAEA.736717
  5. Whiticar, MJ; Faber, E (1989): (Table 2) Total hydrocarbon gas yields of samples from ODP Hole 104-643A. https://doi.org/10.1594/PANGAEA.736722
  6. Whiticar, MJ; Faber, E (1989): (Table 3) Relative hydrocarbon percentage and isotope composition of samples from ODP Hole 104-643A. https://doi.org/10.1594/PANGAEA.736725
  7. Whiticar, MJ; Faber, E (1989): (Table 1) Hydrocarbon composition of headspace and Vacutainer gases of the samples from ODP Hole 104-644A. https://doi.org/10.1594/PANGAEA.736720
  8. Whiticar, MJ; Faber, E (1989): (Table 2) Total hydrocarbon gas yields of samples from ODP Hole 104-644A. https://doi.org/10.1594/PANGAEA.736723
  9. Whiticar, MJ; Faber, E (1989): (Table 3) Relative hydrocarbon percentage and isotope composition of samples from ODP Hole 104-644A. https://doi.org/10.1594/PANGAEA.736726