Whiticar, Michael J; Faber, Eckhard (1987): (Table 1) Gas molecules, isotopic composition and delta Deuterium in DSDP Holes 95-603D and 95-613 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.788516, Supplement to: Whiticar, MJ; Faber, E (1987): Carbon and hydrogen isotopes in gas samples from Leg 95, Holes 603D and 613. In: Poag, CW; Watts, AB; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 95, 647-650, https://doi.org/10.2973/dsdp.proc.95.127.1987
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Abstract:
Methane is the major hydrocarbon gas measured in Vacutainer samples from Holes 603D and 613 ( C1/sumCn > 0.999). In Hole 613 the concentration of this dry hydrocarbon gas is highest (7.4 x 10 **5 ppm max.) in the upper 60 to 120 m, then decreases erratically to low trace levels by 261 m sub-bottom (lower Pliocene). No gas accumulations were observed in older sediments. Methane from both holes is strongly depleted in both 13C (d13C, - 75 to -85 per mil) and deuterium (D/H, - 175 to -262 per mil), indicating the biogenic origin of the methane. The C and H isotopic compositions support methanogenesis via the CO2-reduction pathway; this is also corroborated by the dissolved-sulfate and alkalinity minima at these depths. The relationship between D/H of the methane and coexisting interstitial water from Site 613 further show the methanogenesis to be primarily by CO2 reduction.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 38.635400 * Median Longitude: -71.273650 * South-bound Latitude: 38.499800 * West-bound Longitude: -72.523800 * North-bound Latitude: 38.771000 * East-bound Longitude: -70.023500
Date/Time Start: 1983-09-01T00:00:00 * Date/Time End: 1983-09-17T00:00:00
Minimum DEPTH, sediment/rock: 68.8 m * Maximum DEPTH, sediment/rock: 342.1 m
Event(s):
95-603D * Latitude: 38.499800 * Longitude: -70.023500 * Date/Time: 1983-09-01T00:00:00 * Elevation: -4641.0 m * Penetration: 208.6 m * Recovery: 9.5 m * Location: North Atlantic/RIDGE * Campaign: Leg95 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 1 cores; 9.6 m cored; 0 m drilled; 98.6 % recovery
95-613 * Latitude: 38.771000 * Longitude: -72.523800 * Date/Time: 1983-09-17T00:00:00 * Elevation: -2309.0 m * Penetration: 581.9 m * Recovery: 358 m * Location: North Atlantic/CONT RISE * Campaign: Leg95 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 48 cores; 455.3 m cored; 28.8 m drilled; 78.6 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | Whiticar, Michael J | DSDP/ODP/IODP sample designation | ||
| 3 | Latitude of event | Latitude | ||||
| 4 | Longitude of event | Longitude | ||||
| 5 | Elevation of event | Elevation | m | |||
| 6 | Number | No | Whiticar, Michael J | |||
| 7 | DEPTH, sediment/rock | Depth sed | m | Geocode – mbsf | ||
| 8 | Methane | CH4 | % | Whiticar, Michael J | ||
| 9 | Ethane | C2H6 | % | Whiticar, Michael J | ||
| 10 | C1/total hydrocarbon ratio | C1/Cn | Whiticar, Michael J | |||
| 11 | C1/(C2+C3) hydrocarbon ratio | C1/(C2+C3) | Whiticar, Michael J | |||
| 12 | δ13C, methane | δ13C CH4 | ‰ PDB | Whiticar, Michael J | ||
| 13 | δ Deuterium, methane | δD CH4 | ‰ SMOW | Whiticar, Michael J | ||
| 14 | δ Deuterium, water | δD H2O | ‰ SMOW | Whiticar, Michael J |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
120 data points