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Mineralogy and stable isotopic composition of authigenic carbonate samples fr...
The Campeche Knolls in the Bay of Campeche, southern Gulf of Mexico, were investigated through detailed seafloor mapping, ROV surveys, and sediment and pore water sampling. The... -
Hydrocarbon concentrations from pressurized cores in the northern Gulf of Mexico
Two newly developed coring devices, the Multi-Autoclave-Corer and the Dynamic Autoclave Piston Corer were deployed in shallow gas hydrate-bearing sediments in the northern Gulf... -
Gas hydrate structures and C1-C5 hydrocarbons at individual sites in the Gulf...
Gas hydrate samples from various locations in the Gulf of Mexico (GOM) differ considerably in their microstructure. Distinct microstructure characteristics coincide with... -
(Table 4) In situ methane concentrations (Cm), amount of dissolved methane an...
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... -
(Table 3) Molalities of C1-iC5 in pore water below the AOM zone
No pore water data are available for MAC-12. In 3 out of 4 MAC cores the lower limit of the AOM zone is less than 10 cm deep; the lower limit in MAC-12 is set at 10 cm. In... -
(Table 2) Total gas volume released upon degassing and its hydrocarbon compos...
Ratios of C1-iC5 in relation to the total amount of C1-iC5 (weighed and averaged over time). -
(Table 1) Analysis of pore water (PW) and hydrocarbon gases (HC) on sediment ...
This dataset has no description
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Data compilation of locations of seafloor seeps
Data compilation localising global cold seepage sites on the seafloor. -
(Table 5) Averaged hydrocarbon compositions of gas hydrates sampled at GC185 ...
This dataset has no description
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(Table 2) Boundary conditions used for the calculation of relative contributi...
*Average for each sample; t Background core; NMHC = non-methane hydrocarbons -
(Table 1) Mineralogy and stable isotopic composition of authigenic carbonate ...
Corrected after Kim et al. (2007a). * Based on one bulk XRD analysis for each sample TVG-6-I through XI. -
(Table 3) C1-C5 hydrocarbons measured from purposefully decomposed gas hydrat...
This dataset has no description
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Geochemistry of oil samples of carbonates from seep sites in the southern Gul...
This dataset has no description
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Anaerobic methanotrophic archaea-2 and Desulfosarcina/Desulfococcus group in ...
The anaerobic oxidation of methane (AOM) with sulfate as terminal electron acceptor is mediated by consortia of methanotrophic archaea (ANME) and sulfate-reducing bacteria... -
(Table 1) Crystal sizes of measured samples
Due to experimental difficulties grain size distributions of gas hydrate crystallites are largely unknown in natural samples. For the first time, we were able to determine grain... -
(Table 1) Mean grain sizes and standard deviations of gas hydrate samples
Methane hydrates are present in marine seep systems and occur within the gas hydrate stability zone. Very little is known about their crystallite sizes and size distributions... -
(Table 1) Crystal sizes of measured samples from the Bush Hill region in the ...
The grain sizes of gas hydrate crystallites are largely unknown in natural samples. Single grains are hardly detectable with electron or optical microscopy. For the first time,... -
(Table 1) Hydrocarbon gas composition of sediment and gas hydrate collected i...
In the Campeche Knolls, in the southern Gulf of Mexico, lava-like flows of solidified asphalt cover more than 1 square kilometer of the rim of a dissected salt dome at a depth... -
SO174 raw data of EM120 multibeam echosounder (bathymetry & beam time series)
Between 01.10.2003 and 12.11.2003, bathymetric data was acquired in the Gulf of Mexico during the R/V SONNE cruise SO174. The expedition was dedicated to the types and... -
Sediment echosounder raw data (Atlas Parasound P70 echosounder entire dataset...
Sediment echosounder data was recorded during RV SONNE cruise SO174 between 01.10.2003 and 12.11.2003 in the Gulf of Mexico. The cruise SO174 aimed to investigate the types and...
