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  • 136; Campeche Knoll; Carbon dioxide; Center for Marine Environmental Sciences; Ethane; Isobutane; MARUM; Methane; n-Butane; OTEGA II; Propane; Sample type; see reference(s); SO174/2; SO174/2_136; Sonne; Television-Grab; TVG; δ13C, carbon dioxide, gas hydrate; δ13C, ethane; δ13C, isobutane; δ13C, methane; δ13C, propane  (1)
  • Black Sea; Center for Marine Environmental Sciences; GC; GC-7; GC-8; GC-9; Gravity corer; M52/1; M52/1_34-1; M52/1_37; M52/1_38; M52/1_39; M52/1_48-1; M52/1_49-1; M52/1_53; M52/1_54; M52/1_55; M52/1_63; MARUM; Meteor (1986); Television-Grab; TGC; TGC-2; TGC-4; TGC-5; TGC-6; TGC-7; TGC-8; Thermistor Gravity Corer; TVG; TVG-7  (1)
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  • 1
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    (Table 1) Hydrocarbon gas composition of sediment and gas hydrate collected in video-guided grabs from Chapopote
    PANGAEA
    In:  Supplement to: MacDonald, Ian R; Bohrmann, Gerhard; Escobar, E; Abegg, Friedrich; Blanchon, Paul; Blinova, Valentina N; Brueckmann, Warner; Drews, Manuela; Eisenhauer, Anton; Han, X; Heeschen, Katja U; Meier, Felix; Mortera-Gutierrez, Carlos; Naehr, T; Orcutt, B; Bernard, B; Brroks, J; de Farágo, M (2004): Asphalt volcanism and chemosynthetic life, Campache Knolls, Gulf of Mexico. Science, 304(5673), 999-1002, https://doi.org/10.1126/science.1097154
    Details
    Publication Date: 2023-05-12
    Description: 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 of 3000 meters below sea level. Chemosynthetic tubeworms and bivalves colonize the sea floor near the asphalt, which chilled and contracted after discharge. The site also includes oil seeps, gas hydrate deposits, locally anoxic sediments, and slabs of authigenic carbonate. Asphalt volcanism creates a habitat for chemosynthetic life that may be widespread at great depth in the Gulf of Mexico.
    Keywords: 136; Campeche Knoll; Carbon dioxide; Center for Marine Environmental Sciences; Ethane; Isobutane; MARUM; Methane; n-Butane; OTEGA II; Propane; Sample type; see reference(s); SO174/2; SO174/2_136; Sonne; Television-Grab; TVG; δ13C, carbon dioxide, gas hydrate; δ13C, ethane; δ13C, isobutane; δ13C, methane; δ13C, propane
    Type: Dataset
    Format: text/tab-separated-values, 31 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Determination of hydrocarbon gases in mud volcanoes in the Sorokin Trough (2003)
    PANGAEA
    In:  Supplement to: Blinova, Valentina N; Ivanov, Michael; Bohrmann, Gerhard (2003): Hydrocarbon gases in deposits from mud volcanoes in the Sorokin Trough, northeatsern Black Sea. Geo-Marine Letters, 23(3-4), 250-257, https://doi.org/10.1007/s00367-003-0148-8
    Details
    Publication Date: 2024-02-02
    Description: Hydrocarbon gases were determined in sediments from three mud volcanoes in the Sorokin Trough. In comparison to a reference station outside the mud volcano area, the deposits are characterized by an enrichment of high-molecular hydrocarbons (C2-C4), an absence of unsaturated homologues, a predominance of iso-butane in comparison with n-butane, and the presence of gas hydrate. The molecular composition of the hydrocarbon gases suggests their deep sources and thermogenic origin. In the pelagic sediments at the reference station, the methane concentration is relatively low (up to 49 ml/l); maximum concentrations are reached in deposits of the Dvurechenskii mud volcano (up to 400 ml/l). It was the first time that gas hydrate was sampled at the Dvurechenskii mud volcano. The gas extracted by dissociation of hydrate samples was dominated by methane (99.5%) with low amounts of ethane and propane (less than 0.5%). The isotopic composition of the methane varies between -62 and -66 per mill PDB in d13C, and between -185 and -209 per mill SMOW in dD, indicating a mainly biogenic origin with an admixture of thermogenic gas.
    Keywords: Black Sea; Center for Marine Environmental Sciences; GC; GC-7; GC-8; GC-9; Gravity corer; M52/1; M52/1_34-1; M52/1_37; M52/1_38; M52/1_39; M52/1_48-1; M52/1_49-1; M52/1_53; M52/1_54; M52/1_55; M52/1_63; MARUM; Meteor (1986); Television-Grab; TGC; TGC-2; TGC-4; TGC-5; TGC-6; TGC-7; TGC-8; Thermistor Gravity Corer; TVG; TVG-7
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
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