Not logged in
Data Publisher for Earth & Environmental Science

Pape, Thomas; Feseker, Tomas; Kasten, Sabine; Fischer, David; Bohrmann, Gerhard (2011): Gas hydrates of nonpressurized (GC) and pressurized (DAPC) sediment cores from the Hakon Mosby Mud Volcano, SW Barents Sea [dataset publication series]. PANGAEA,, Supplement to: Pape, T et al. (2011): Distribution and abundance of gas hydrates in near-surface deposits of the Håkon Mosby Mud Volcano, SW Barents Sea. Geochemistry, Geophysics, Geosystems, 12(9), Q09009, 21 PP.,

Always quote citation above when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

The occurrence of gas hydrates at submarine mud volcanoes (MVs) located within the gas hydrate stability zone (GHSZ) is controlled by upward fluid and heat flux associated with MV activity. Determining the spatial distribution of gas hydrates at MVs is crucial to evaluate their sensitivity to known episodic changes in volcanic activity. We determined the hydrocarbon inventory and spatial distribution of hydrates at an individual MV structure. The Håkon Mosby Mud Volcano (HMMV), located at 1,250 m water depth on the Barents Sea slope, was investigated by combined pressure core sampling, heat flow measurements, and pore water chemical analysis. Quantitative pressure core degassing revealed gas-sediment ratios between 3.1 and 25.7, corresponding to hydrate concentrations of up to 21.3% of the pore volume. Hydrocarbon compositions and physicochemical conditions imply that gas hydrates incipiently crystallize as structure I hydrate, with a dissociation temperature of around 13.8°C at this water depth. Based on numerous in situ measurements of the geothermal gradient in the seabed, pore water sulfate profiles and microbathymetric data, we show that the thickness of the GHSZ increases from less than 1 m at the warm center to around 47 m in the outer parts of the HMMV. We estimate the total mass of hydrate-bound methane stored at the HMMV to be about 102.5 kt, of which 2.8 kt are located within the morphological Unit I around the center and thus are likely to be dissociated in the course of a large eruption.
Sixth Framework Programme (FP6), grant/award no. 511234: Hotspot Ecosystem Research on the Margins of European Seas
Median Latitude: 72.005605 * Median Longitude: 14.725499 * South-bound Latitude: 72.002400 * West-bound Longitude: 14.712300 * North-bound Latitude: 72.008000 * East-bound Longitude: 14.735000
Date/Time Start: 2007-06-25T19:30:00 * Date/Time End: 2007-07-05T21:49:00
PS70/053-1 * Latitude: 72.006300 * Longitude: 14.733900 * Date/Time: 2007-06-25T19:30:00 * Elevation: -1294.0 m * Location: Norwegian Sea * Campaign: ARK-XXII/1b (PS70) * Basis: Polarstern * Method/Device: Piston corer (PC)
PS70/054-1 * Latitude: 72.006200 * Longitude: 14.735000 * Date/Time: 2007-06-25T21:17:00 * Elevation: -1292.0 m * Location: Norwegian Sea * Campaign: ARK-XXII/1b (PS70) * Basis: Polarstern * Method/Device: Gravity corer (GC)
PS70/068-1 * Latitude: 72.005000 * Longitude: 14.728900 * Date/Time: 2007-06-27T09:26:00 * Elevation: -1290.0 m * Location: Norwegian Sea * Campaign: ARK-XXII/1b (PS70) * Basis: Polarstern * Method/Device: Piston corer (PC)
5 datasets

Download Data

Download ZIP file containing all datasets as tab-delimited text — use the following character encoding: