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  • Data  (13)
  • 2020-2024
  • 2005-2009  (13)
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  • 1
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    (Table 1) Analysis of pore water (PW) and hydrocarbon gases (HC) on sediment samples after degassing, and the recovery pressure (pressure) on SO174 samples (2007)
    PANGAEA
    Details
    Publication Date: 2023-07-10
    Keywords: 152; 153; 158; 166; 170; Analysis; Bush Hill; Center for Marine Environmental Sciences; DAPC; Device type; Dynamic autoclave piston corer; Elevation of event; Event label; Latitude of event; Location type; Longitude of event; MAC; MARUM; Multi autoclave corer; OTEGA II; Pressure, water; Sample, optional label/labor no; SO174/1; SO174/1_118; SO174/1_63; SO174/1_90; SO174/1_97; SO174/2; SO174/2_152; SO174/2_153; SO174/2_158; SO174/2_166; SO174/2_170; Sonne
    Type: Dataset
    Format: text/tab-separated-values, 42 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    (Table T1) Gas hydrate fabric and dipping angles of ODP Leg 204 sediments (2006)
    PANGAEA
    In:  Supplement to: Abegg, Friedrich; Bohrmann, Gerhard; Kuhs, Werner F (2006): Data report: Shapes and structures of gas hydrates imaged by computed tomographic analyses, ODP Leg 204, Hydrate Ridge. In: Tréhu, AM; Bohrmann, G; Torres, ME; Colwell, FS (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 204, 1-11, https://doi.org/10.2973/odp.proc.sr.204.122.2006
    Details
    Publication Date: 2024-01-09
    Description: The sediments of Hydrate Ridge/Cascadia margin contain extensive amounts of gas hydrate. A total of 57 sediment samples including gas hydrate were preserved in liquid nitrogen and have been imaged using computerized tomography to visualize hydrate distribution and shape. The analysis gives evidence that gas hydrate in vein and veinlet structures is the predominant shape in the deeper gas hydrate stability zone with dipping angles from 30° to 90°(vertical).
    Keywords: 204-1244; 204-1245; 204-1246; 204-1247; 204-1248; 204-1249; 204-1250; 204-1252; Angle; Clast shape; COMPCORE; Composite Core; Computer tomography (CT) MARCONI Medical MX 8000; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Event label; Joides Resolution; Leg204; North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 160 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    (Table 1) Sample identifier, fabric and dipping angle from ODP Leg 204 samples on Hydrate Ridge, offshore Oregon (2007)
    PANGAEA
    In:  Supplement to: Abegg, Friedrich; Bohrmann, Gerhard; Freitag, Johannes; Kuhs, Werner F (2007): Fabric of gas hydrate in sediments from Hydrate Ridge - results from ODP Leg 204 samples. Geo-Marine Letters, 27, 269-277, https://doi.org/10.1007/s00367-007-0080-4
    Details
    Publication Date: 2024-01-09
    Description: Drilling on Hydrate Ridge, offshore Oregon, during ODP Leg 204 enabled us to investigate fabrics of gas hydrate samples in a wide depth range of the gas hydrate stability zone (GHSZ). X-ray computerized tomographic imaging on whole-round samples, frozen in liquid nitrogen, revealed that layered gas hydrate structures are related to variable processes occurring at different sediment depths. Shallow gas hydrates often form layers parallel or sub-parallel to bedding and also crosscut sedimentary strata and other gas hydrate layers, destroying the original depositional fabric. The dynamic processes interacting with this complicated plumbing system in this shallow environment are responsible for such highly variable gas hydrate fabrics. Gas hydrate layers deeper in the sediments are most often dipping with various angles, and are interpreted as gas hydrate precipitates filling tectonic fractures. These originally open fractures are potential candidates for free gas transportation, and might explain why free gas can rapidly emanate from below the bottom-simulating reflector through the GHSZ to the seafloor.
    Keywords: 204-1244C; 204-1244E; 204-1245B; 204-1247B; 204-1248C; 204-1249B; 204-1249C; 204-1249F; 204-1250D; 204-1252A; Angle; Clast shape; Computer tomography (CT) MARCONI Medical MX 8000; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Event label; Joides Resolution; Leg204; North Pacific Ocean; Ocean Drilling Program; ODP; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 78 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    (Table 1) Development of pressure inside LTC 3 during 57 days (2008)
    PANGAEA
    In:  Supplement to: Abegg, Friedrich; Hohnberg, Hans-Jürgen; Pape, Thomas; Bohrmann, Gerhard; Freitag, Johannes (2008): Development and application of pressure-core-sampling systems for the investigation of gas- and gas-hydrate-bearing sediments. Deep Sea Research Part I: Oceanographic Research Papers, 55(11), 1590-1599, https://doi.org/10.1016/j.dsr.2008.06.006
    Details
    Publication Date: 2024-04-18
    Description: Free or hydrate-bound gas in the seafloor has been of scientific, ecologic and economic interest for many years because it predominantly contains high concentrations of low-molecular-weight hydrocarbons. A prerequisite of accurate quantifications of gases in sediments is to preserve pressure and temperature close to the in situ conditions during recovery. Here we introduce two new sediment coring devices that allow for the recovery of near-surface gas- and gas-hydrate-bearing sediments and subsequent investigations using several different techniques such as visualisation by computerized tomography, quantitative degassing, and sediment and porewater analyses. The first coring tool, the Multiple Autoclave Corer (MAC), resembles a standard multiple corer in terms of applications, size and core length of about 55 cm. The second tool, the Dynamic Autoclave Piston Corer (DAPC), is similar to a piston corer in application and size and enables one to take cores of up to 2.5 m length. Both focus on the investigation of near-surface sediments, which are most strongly affected by changes in bottom-water temperature and hydrostatic pressure, which in turn influence continental slope stability. Some results from recent offshore applications show the potential of these tools.
    Keywords: 229TV-MAC-8; Center for Marine Environmental Sciences; MARUM; Optical pressure gauge; OTEGA I; Pressure; SO165/2; SO165/2_229; Sonne; Television Multi-Autoklave corer; TV-MAC
    Type: Dataset
    Format: text/tab-separated-values, 7 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    (Table 1) Hydrate, ice and quartz content of ODP Hole 204-1244C (2007)
    PANGAEA
    Details
    Publication Date: 2024-05-18
    Keywords: 204-1244C; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Hydrate; Hydrate, standard deviation; Ice content; Ice content, standard deviation; Joides Resolution; Leg204; North Pacific Ocean; Number; Ocean Drilling Program; ODP; Quartz; Quartz, standard deviation; Sample code/label; X-ray diffraction, Rietveld analyses
    Type: Dataset
    Format: text/tab-separated-values, 16 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    (Table 1) Hydrate, ice and quartz content of ODP Hole 204-1245B (2007)
    PANGAEA
    Details
    Publication Date: 2024-05-18
    Keywords: 204-1245B; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Hydrate; Hydrate, standard deviation; Ice content; Ice content, standard deviation; Joides Resolution; Leg204; North Pacific Ocean; Number; Ocean Drilling Program; ODP; Quartz; Quartz, standard deviation; Sample code/label; X-ray diffraction, Rietveld analyses
    Type: Dataset
    Format: text/tab-separated-values, 8 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    (Table 1) Hydrate, ice and quartz content of ODP Hole 204-1248C (2007)
    PANGAEA
    Details
    Publication Date: 2024-05-18
    Keywords: 204-1248C; Comment; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Hydrate; Hydrate, standard deviation; Ice content; Ice content, standard deviation; Joides Resolution; Leg204; North Pacific Ocean; Number; Ocean Drilling Program; ODP; Quartz; Quartz, standard deviation; Sample code/label; X-ray diffraction, Rietveld analyses
    Type: Dataset
    Format: text/tab-separated-values, 47 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    (Table 1) Hydrate, ice and quartz content of ODP Hole 204-1249F (2007)
    PANGAEA
    Details
    Publication Date: 2024-05-18
    Keywords: 204-1249F; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Hydrate; Ice content; Joides Resolution; Leg204; North Pacific Ocean; Number; Ocean Drilling Program; ODP; Quartz; Sample code/label; X-ray diffraction, Rietveld analyses
    Type: Dataset
    Format: text/tab-separated-values, 5 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    (Table 1) Hydrate, ice and quartz content of ODP Hole 204-1250D (2007)
    PANGAEA
    Details
    Publication Date: 2024-05-18
    Keywords: 204-1250D; Comment; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Hydrate; Hydrate, standard deviation; Ice content; Ice content, standard deviation; Joides Resolution; Leg204; North Pacific Ocean; Number; Ocean Drilling Program; ODP; Quartz; Quartz, standard deviation; Sample code/label; X-ray diffraction, Rietveld analyses
    Type: Dataset
    Format: text/tab-separated-values, 40 data points
    Location Call Number Limitation Availability
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  • 10
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    Hydrate, ice and quartz content of eight holes of Leg 204 (2007)
    PANGAEA
    In:  Supplement to: Bohrmann, Gerhard; Kuhs, Werner F; Klapp, Stephan A; Techmer, Kirsten S; Klein, Helmut; Murshed, Mangir M; Abegg, Friedrich (2007): Appearance and preservation of natural gas hydrate from Hydrate Ridge sampled during ODP Leg 204 drilling. Marine Geology, 244(1-4), 1-14, https://doi.org/10.1016/j.margeo.2007.05.003
    Details
    Publication Date: 2024-05-18
    Description: The state of preservation of natural gas hydrate samples, recovered from 6 sites drilled during ODP Leg 204 at southern summit of Hydrate Ridge, Oregon Margin, has been investigated by X-ray diffraction (XRD) and cryo-scanning-electron-microscopy (cryo-SEM) techniques. A detailed characterization of the state of decomposition of gas hydrates is necessary since no pressurized autoclave tools were used for sampling and partial dissociation must have occurred during recovery prior to the quench and storage in liquid nitrogen. Samples from 16 distinct horizons have been investigated by synchrotron X-ray diffraction measurements at HASYLAB/ Hamburg. A full profile fitting analysis (“Rietveld method”) of synchrotron XRD data provides quantitative phase determinations of the major sample constituents such as gas hydrate structure I (sI), hexagonal ice (Ih) and quartz. The ice content (Ih) in each sample is related to frozen water composed of both original existing pore water and the water from decomposed hydrates. Hydrate contents as measured by diffraction vary between 0 and 68 wt.% in the samples we measured. Samples with low hydrate content usually show micro-structural features in cryo-SEM ascribed to extensive decomposition. Comparing the appearance of hydrates at different scales, the grade of preservation seems to be primarily correlated with the contiguous volume of the original existing hydrate; the dissociation front appears to be indicated by micrometer-sized pores in a dense ice matrix.
    Keywords: 204-1244C; 204-1245B; 204-1247B; 204-1248C; 204-1249C; 204-1249F; 204-1250C; 204-1250D; DRILL; Drilling/drill rig; Joides Resolution; Leg204; North Pacific Ocean; Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 8 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
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