Kvenvolden, Keith A; Barnard, Patrick L (1983): (Table 2) Methane to ethane ratio, and δ¹³C-methane at DSDP Hole 76-533 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.809741, Supplement to: Kvenvolden, KA; Barnard, PL (1983): Gas hydrates of the Blake Outer Ridge Site 533, Deep Sea Drilling Project Leg 76. In: Sheridan, RE; Gradstein, FM; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 76, 353-365, https://doi.org/10.2973/dsdp.proc.76.106.1983
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Natural gas hydrates are clathrates in which water molecules form a crystalline framework that includes and is stabilized by natural gas (mainly methane) at appropriate conditions of high pressures and low temperatures. The conditions for the formation of gas hydrates are met within continental margin sediments below water depths greater than about 500 m where the supply of methane is sufficient to stabilize the gas hydrate. Observations on DSDP Leg 11 suggested the presence of gas hydrates in sediments of the Blake Outer Ridge. Leg 76 coring and sampling confirms that, indeed, gas hydrates are present there. Geochemical evidence for gas hydrates in sediment of the Blake Outer Ridge includes (1) high concentrations of methane, (2) a sediment sample with thin, matlike layers of white crystals that released a volume of gas twenty times greater than its volume of pore fluid, (3) a molecular distribution of hydrocarbon gases that excluded hydrocarbons larger than isobutane, (4) results from pressure core barrel experiments, and (5) pore-fluid chemistry. The molecular composition of the hydrocarbons in these gas hydrates and the isotopic composition of the methane indicate that the gas is derived mainly from microbiological processes operating on the organic matter within the sediment. Although gas hydrates apparently are widespread on the Blake Outer Ridge, they probably are not of great economic significance as a potential, unconventional, energy resource or as an impermeable cap for trapping upwardly migrating gas at Site 533.
Related to:
Brooks, James M; Barnard, Leo A; Weisenburg, Denis A; Kennicutt, Mahlon C; Kvenvolden, Keith A (1983): Molecular and isotopic compositions of hydrocarbons at Site 533, Deep Sea Drilling Project Leg 76. In: Sheridan, RE; Gradstein, FM; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 76, 377-389, https://doi.org/10.2973/dsdp.proc.76.108.1983
Galimov, Erik M; Kvenvolden, Keith A (1983): Concentrations and carbon isotopic compositions of CH4 and CO2 in gas from sediments of the Blake Outer Ridge, Deep Sea Drilling Project Leg 76. In: Sheridan, RE; Gradstein, FM; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 76, 403-407, https://doi.org/10.2973/dsdp.proc.76.110.1983
Original version:
Brooks, James M; Barnard, Leo A; Weisenburg, Denis A; Kennicutt, Mahlon C; Kvenvolden, Keith A (1983): (Table 1) δ¹³C-methane from pressure core barrel at DSDP Hole 76-533. PANGAEA, https://doi.org/10.1594/PANGAEA.809745 (delta 13C, methane pressure core barrel and sediment extraction)
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 31.260000 * Longitude: -74.869800
Date/Time Start: 1980-10-13T00:00:00 * Date/Time End: 1980-10-13T00:00:00
Minimum DEPTH, sediment/rock: 153.25 m * Maximum DEPTH, sediment/rock: 395.60 m
Event(s):
76-533 * Latitude: 31.260000 * Longitude: -74.869800 * Date/Time: 1980-10-13T00:00:00 * Elevation: -3191.0 m * Penetration: 167.5 m * Recovery: 144.8 m * Location: North Atlantic/RIDGE * Campaign: Leg76 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 41 cores; 167.5 m cored; 0 m drilled; 86.5 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Identification | ID | Kvenvolden, Keith A | |||
| 2 | Depth, top/min | Depth top | m | Kvenvolden, Keith A | ||
| 3 | Depth, bottom/max | Depth bot | m | Kvenvolden, Keith A | ||
| 4 | DEPTH, sediment/rock | Depth sed | m | Geocode – mbsf | ||
| 5 | Interval Cored | Cored | m | Kvenvolden, Keith A | # = Unpressurized core | |
| 6 | Pressure, stress | P | MPa | Kvenvolden, Keith A | ||
| 7 | Methane/ethane ratio | C1/C2 | Kvenvolden, Keith A | Pressure core barrel | ||
| 8 | Methane/ethane ratio | C1/C2 | Kvenvolden, Keith A | Gas pockets | ||
| 9 | δ13C, methane | δ13C CH4 | ‰ PDB | Kvenvolden, Keith A | Pressure core barrel; fom Brooks et al 1983 | |
| 10 | δ13C, methane | δ13C CH4 | ‰ PDB | Kvenvolden, Keith A | Sediment extraction; from Brooks et al 1983 | |
| 11 | δ13C, methane | δ13C CH4 | ‰ PDB | Kvenvolden, Keith A | Gas pockets; from Galimov and Kvenvolden 1983 |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
46 data points