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 [dataset]. 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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Project(s):
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_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 * Method/Device: Multi autoclave corer (MAC)
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):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Elevation of event | Elevation | m | |||
| 5 | Device type | Device | Heeschen, Katja U | |||
| 6 | Length | l | m | Heeschen, Katja U | C | |
| 7 | Length | l | m | Heeschen, Katja U | C AOM | |
| 8 | Methane | CH4 | µmol/kg | Heeschen, Katja U | see reference(s) | C m |
| 9 | Methane | CH4 | µmol/kg | Heeschen, Katja U | see reference(s) | C eq |
| 10 | Methane, absolute volume | CH4 | µl | Heeschen, Katja U | see reference(s) | C diss, l |
| 11 | Gas hydrate volume | GH vol | l | Heeschen, Katja U | see reference(s) | GH vol.*, l |
| 12 | Gas hydrate | GH vol | % | Heeschen, Katja U | see reference(s) | GH, %ps |
| 13 | Gas hydrate | GH vol | % | Heeschen, Katja U | see reference(s) | GH, %cv |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
58 data points
Data
| 1 Event | 2 Latitude | 3 Longitude | 4 Elevation [m] | 5 Device | 6 l [m] (C) | 7 l [m] (C AOM) | 8 CH4 [µmol/kg] (C m) | 9 CH4 [µmol/kg] (C eq) | 10 CH4 [µl] (C diss, l) | 11 GH vol [l] (GH vol.*, l) | 12 GH vol [%] (GH, %ps) | 13 GH vol [%] (GH, %cv) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SO174/1_63 | 27.542160 | -90.993250 | -1049 | MAC-04 | 0.15 | 0.10 | 985000 | 54000 | 740000 | 0.099 | 18.0 | 13.3 |
| SO174/2_152 | 27.543480 | -90.992250 | -1041 | MAC-09 | 0.18 | 0.09 | 59000 | 54000 | 610000 | |||
| SO174/2_170 | 27.557530 | -90.981100 | -946 | MAC-12 | 0.20 | 0.10 | 53000 | 54000 | 530000 | |||
| SO174/2_153 | 27.543330 | -90.992660 | -1041 | DAPC-03 | 1.26 | 0.81 | 31000 | 54000 | 3340000 | |||
| DAPC-04 | 1.20 | 0.75 | 63000 | 54000 | 2780000 | 0.004 | 0.2 | 0.2 | ||||
| SO174/1_118 | 27.469690 | -91.507150 | -552 | MAC-07 | 0.18 | 0.09 | 116000 | 67000 | 760000 | 0.004 | 1.0 | 0.8 |
| SO174/2_158 | 27.782800 | -91.507810 | -555 | MAC-10 | 0.23 | 0.00 | 67000 | |||||
| SO174/1_90 | 27.782460 | -91.508030 | -549 | DAPC-01 | 1.50 | 1.15 | 857000 | 67000 | 4390000 | 0.403 | 15.3 | 8.1 |