Lorenson, Thomas D; Colwell, Frederick S; Delwiche, Mark E; Dougherty, Jennifer A (2006): Pore water acetate and hydrogen, helium and methane gas concentrations in ODP Leg 204 sediments [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.774798, Supplement to: Lorenson, TD et al. (2006): Data report: Acetate and hydrogen concentrations in pore fluids associated with a large gas hydrate reservoir, southern Hydrate Ridge, offshore Oregon, USA. In: Tréhu, AM; Bohrmann, G; Torres, ME; Colwell, FS (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 204, 1-20, https://doi.org/10.2973/odp.proc.sr.204.126.2006
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Abstract:
Acetate and hydrogen concentrations in pore fluids were measured in samples taken at seven sites from southern Hydrate Ridge (SHR) offshore Oregon, USA. Acetate concentrations ranged from 3.17 to 2515 µM. The maximum acetate concentrations occurred at Site 1251, which was drilled on a slope basin to the east of SHR at depths just above the bottom-simulating reflector (BSR) that marks the boundary of gas hydrate stability. Acetate maxima and localized high acetate concentrations occurred at the BSR at all sites and frequently corresponded with areas of gas hydrate accumulation, suggesting an empirical relationship. Acetate concentrations were typically at a minimum near the seafloor and above the sulfate/methane interface, where sulfate-reducing bacteria may consume acetate. Hydrogen concentrations in pressure core samples ranged from 16.45 to 1036 parts per million by volume (ppmv). In some cases, hydrogen and acetate concentrations were elevated concurrently, suggesting a positive correlation. However, sampling of hydrogen was limited in comparison to acetate, so any relationships between the two analytes, if present, were difficult to discern.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 44.573861 * Median Longitude: -125.123582 * South-bound Latitude: 44.568430 * West-bound Longitude: -125.150300 * North-bound Latitude: 44.586300 * East-bound Longitude: -125.073950
Date/Time Start: 2002-07-15T17:50:00 * Date/Time End: 2002-08-31T12:15:00
Event(s):
204-1244C * Latitude: 44.586300 * Longitude: -125.119830 * Date/Time Start: 2002-07-13T12:45:00 * Date/Time End: 2002-07-16T05:30:00 * Elevation: -895.1 m * Penetration: 333.5 m * Recovery: 315.5 m * Location: North Pacific Ocean * Campaign: Leg204 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 39 cores; 332 m cored; 1.5 m drilled; 95 % recovery
204-1244E * Latitude: 44.586180 * Longitude: -125.119530 * Date/Time Start: 2002-08-18T23:00:00 * Date/Time End: 2002-08-22T01:45:00 * Elevation: -893.3 m * Penetration: 250 m * Recovery: 137.73 m * Location: North Pacific Ocean * Campaign: Leg204 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 19 cores; 135.8 m cored; 114.2 m drilled; 101.4 % recovery
204-1245B * Latitude: 44.585980 * Longitude: -125.149100 * Date/Time Start: 2002-08-06T07:15:00 * Date/Time End: 2002-08-09T15:45:00 * Elevation: -869.7 m * Penetration: 473.7 m * Recovery: 418.02 m * Location: North Pacific Ocean * Campaign: Leg204 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 53 cores; 471.7 m cored; 2 m drilled; 88.6 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Lorenson, TD; Colwell, FS; Delwiche, ME et al. (2006): (Table T1) Acetate ion concentration in interstitial waters of ODP Leg 204 sediments. https://doi.org/10.1594/PANGAEA.774796
- Lorenson, TD; Colwell, FS; Delwiche, ME et al. (2006): (Table T2) Hydrogen, helium, and methane gas concentrations in PCS gas samples of ODP Leg 204 sediments. https://doi.org/10.1594/PANGAEA.774797