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Heeschen, Katja U; Hohnberg, Hans-Jürgen; Haeckel, Matthias; Abegg, Friedrich; Drews, Manuela; Bohrmann, Gerhard (2007): (Table 4) In situ methane concentrations (Cm), amount of dissolved methane and gas hydrate ratios in pressure cores assuming an occurrence of methane below the AOM reaction zone. PANGAEA, https://doi.org/10.1594/PANGAEA.772754, In supplement to: Heeschen, KU et al. (2007): In situ hydrocarbon concentrations from pressurized cores in surface sediments, Northern Gulf of Mexico. Marine Chemistry, 107(4), 498-515, https://doi.org/10.1016/j.marchem.2007.08.008

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Coverage:
Median Latitude: 27.603064 * Median Longitude: -91.211750 * South-bound Latitude: 27.469690 * West-bound Longitude: -91.508030 * North-bound Latitude: 27.782800 * East-bound Longitude: -90.981100
Date/Time Start: 2003-10-15T21:14:00 * Date/Time End: 2003-11-08T17:44:00
Minimum Elevation: -1049.0 m * Maximum Elevation: -549.0 m
Event(s):
SO174/1_118 * Latitude: 27.469690 * Longitude: -91.507150 * Date/Time: 2003-10-21T23:21:00 * Elevation: -552.0 m * Location: Bush Hill * Campaign: SO174/1 (OTEGA II) * Basis: Sonne * Device: Multi autoclave corer (MAC)
SO174/1_63 * Latitude: 27.542160 * Longitude: -90.993250 * Date/Time: 2003-10-15T21:14:00 * Elevation: -1049.0 m * Campaign: SO174/1 (OTEGA II) * Basis: Sonne * Device: Multi autoclave corer (MAC)
SO174/1_90 * Latitude: 27.782460 * Longitude: -91.508030 * Date/Time: 2003-10-18T23:00:00 * Elevation: -549.0 m * Recovery: 1.3 m * Location: Bush Hill * Campaign: SO174/1 (OTEGA II) * Basis: Sonne * Device: Dynamic autoclave piston corer (DAPC)
Comment:
C = Core length, C AOM = core length below AOM zone, GH = gas hydrate, vol = volume, ps = pore space and cv = core volume.
* This gas:water ratio of 132/1 is in between the ratio observed by Brooks et al. (1984) (70/1) and those of other authors: 140/1 (Milkov and Sassen, 2001); 160/1 (Chen and Cathles, 2003).
* l No pore water data are available. In 3 out of 4 MAC cores the lower limit of the AOM zone is less than 10 cm deep.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1Event labelEvent
2Latitude of eventLatitude
3Longitude of eventLongitude
4Elevation of eventElevationm
5Device typeDeviceHeeschen, Katja U
6LengthlmHeeschen, Katja UC
7LengthlmHeeschen, Katja UC AOM
8MethaneCH4µmol/kgHeeschen, Katja Usee reference(s)C m
9MethaneCH4µmol/kgHeeschen, Katja Usee reference(s)C eq
10Methane, absolute volumeCH4µlHeeschen, Katja Usee reference(s)C diss, l
11Gas hydrate volumeGH vollHeeschen, Katja Usee reference(s)GH vol.*, l
12Gas hydrateGH vol%Heeschen, Katja Usee reference(s)GH, %ps
13Gas hydrateGH vol%Heeschen, Katja Usee reference(s)GH, %cv
Size:
58 data points

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