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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,, 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,

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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
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)
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.
#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
58 data points

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