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  • Gashydrate  (2)
  • 10/2KAL; Alkalinity, total; Ammonium; Calcium; Continuous Flow Automated Analysis (Gordon et al., 1993, WOCE Tech Rpt 93-1); DEPTH, sediment/rock; GEOMAR; Helmholtz Centre for Ocean Research Kiel; HYDROTRACE; Juan de Fuca Ridge, North Pacific Ocean; KAL; Kasten corer; Magnesium; Nitrate; pH; Phosphate; Silicate; SO109/1; SO109/1_10-2; Sonne; Spectrophotometry; Titration  (1)
  • 12925-008; 12926-002; 12930-040; 12930-045; 12930-075; 12930-082; 12930-087; 13077-018; 13077-021; 13077-035; 13077-057; 13078-019; 13200-012; 13200-024; 13200-026; 13200-032; 13200-059; 13200-074; 13201-005; 13368-040; 362; 54301-002; 54301-010; 54301-023; ALBEX lander; Bengal; BENGAL; Benthic Biology and Geochemistry of a North-eastern Atlantic Abyssal Locality; CH135; Challenger; D222/1; D222/2; D226; D229; D231; D236; DI236_11-1; Discovery (1962); GBGL; GBGL-01; GBGL-02; Göteborg lander; M36/6; M36/6_MC33; M42/2; M42/2_365; M42/2_367; M42/2_377-6; M42/2_381; M42/2_397-1; M42/2_422; M42/2_425; M42/2_432-1; M42/2_433; M42/2_MC2; M42/2_MC28; M42/2_MC30; M42/2_MC32; M42/2_MC34; M42/2_MC5; M42/2_MC9; MCB57; MCS; Meteor (1986); MUC; MultiCorer; MultiCorer, small; MultiCorer Barnett pattern (12-57); NIOZL  (1)
Publikationsart
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  • 1
    Buch
    Buch
    SO 143-TECFLUX-I: Die Methanhydrate der Cascadia Subduktionszone und ihre Langzeiteinwirkung auf das Ökosystem Tiefsee : Abschlussbericht (2001)
    Kiel : GEOMAR Forschungszentrum, Marine Umweltgeologie
    Details Verfügbarkeit
    Schlagwort(e): Forschungsbericht ; Erdgasgewinnung ; Offshore-Technik ; Gashydrate ; Methan
    Materialart: Buch
    Seiten: 52, [1] Bl. , Ill., graph. Darst.
    Sprache: Deutsch , Englisch
    Anmerkung: Förderkennzeichen BMBF 03 G 0143 A/5. - Engl. Zsfassung u.d.T.: Properties and fabric of near-surface methane hydrates at Hydrate Ridge, Cascadia Margin , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Auch als elektronische Ressource vorh
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  • 2
    Online-Ressource
    Online-Ressource
    SO 143-TECFLUX-I: Die Methanhydrate der Cascadia Subduktionszone und ihre Langzeiteinwirkung auf das Ökosystem Tiefsee : Abschlussbericht (2001)
    Kiel : GEOMAR Forschungszentrum, Marine Umweltgeologie
    Details Verfügbarkeit
    Schlagwort(e): Forschungsbericht ; Erdgasgewinnung ; Offshore-Technik ; Gashydrate ; Methan
    Materialart: Online-Ressource
    Seiten: Online-Ressource (54 p., 2,18 Mb.) , ill., graphs
    Ausgabe: [Elektronische Ressource]
    URL: https://edocs.tib.eu/files/e01fb02/369539273.pdf
    URL: https://edocs.tib.eu/files/e01fb02/369539273l.pdf
    Sprache: Deutsch , Englisch
    Anmerkung: Differences between the printed and electronic version of the document are possible. - Contract BMBF 03G0143A/5. - Engl. abstract under title: Properties and fabric of near-surface methane hydrates at hydrate ridge, Cascadia margin , nIndex p. 38 - 40. - nBibliography p. 41 - 50 , Also available as printed version , Systemvoraussetzungen: Acrobat reader.
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  • 3
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    Geochemistry of pore water at station SO109/1-10-2 (2002)
    PANGAEA
    Details
    Publikationsdatum: 2023-06-27
    Schlagwort(e): 10/2KAL; Alkalinity, total; Ammonium; Calcium; Continuous Flow Automated Analysis (Gordon et al., 1993, WOCE Tech Rpt 93-1); DEPTH, sediment/rock; GEOMAR; Helmholtz Centre for Ocean Research Kiel; HYDROTRACE; Juan de Fuca Ridge, North Pacific Ocean; KAL; Kasten corer; Magnesium; Nitrate; pH; Phosphate; Silicate; SO109/1; SO109/1_10-2; Sonne; Spectrophotometry; Titration
    Materialart: Dataset
    Format: text/tab-separated-values, 165 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 4
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    Unbekannt
    Biogenic silica and silicic acid benthic fluxes of a North-eastern Atlantic Abyssal Locality (2001)
    PANGAEA
    In:  Supplement to: Ragueneau, Olivier; Gallinari, Morgane; Corrin, Lydie; Grandel, Sibylle; Hall, Per; Hauvespre, Anne; Lampitt, Richard Stephen; Rickert, Dirk; Ståhl, Henrik; Tengberg, Anders; Witbaard, Rob (2001): The benthic silica cycle in the Northeast Atlantic: annual mass balance, seasonality, and importance of non-steady-state processes for the early diagenesis of biogenic opal in deep-sea sediments. Progress in Oceanography, 50(1-4), 171-200, https://doi.org/10.1016/S0079-6611(01)00053-2
    Details
    Publikationsdatum: 2024-04-18
    Beschreibung: Within the framework of the EU-funded BENGAL programme, the effects of seasonality on biogenic silica early diagenesis have been studied at the Porcupine Abyssal Plain (PAP), an abyssal locality located in the northeast Atlantic Ocean. Nine cruises were carried out between August 1996 and August 1998. Silicic acid (DSi) increased downward from 46.2 to 213 µM (mean of 27 profiles). Biogenic silica (BSi) decreased from ca. 2% near the sediment-water interface to 〈1% at depth. Benthic silicic acid fluxes as measured from benthic chambers were close to those estimated from non-linear DSi porewater gradients. Some 90% of the dissolution occurred within the top 5.5 cm of the sediment column, rather than at the sediment-water interface and the annual DSi efflux was close to 0.057 mol Si/m**2/yr. Biogenic silica accumulation was close to 0.008 mol Si/m**2/yr and the annual opal delivery reconstructed from sedimentary fluxes, assuming steady state, was 0.065 mol Si/m**2/yr. This is in good agreement with the mean annual opal flux determined from sediment trap samples, averaged over the last decade (0.062 mol Si/m**2/yr). Thus ca. 12% of the opal flux delivered to the seafloor get preserved in the sediments. A simple comparison between the sedimentation rate and the dissolution rate in the uppermost 5.5 cm of the sediment column suggests that there should be no accumulation of opal in PAP sediments. However, by combining the BENGAL high sampling frequency with our experimental results on BSi dissolution, we conclude that non-steady state processes associated with the seasonal deposition of fresh biogenic particles may well play a fundamental role in the preservation of BSi in these sediments. This comes about though the way seasonal variability affects the quality of the biogenic matter reaching the seafloor. Hence it influences the intrinsic dissolution properties of the opal at the seafloor and also the part played by non-local mixing events by ensuring the rapid transport of BSi particles deep into the sediment to where saturation is reached.
    Schlagwort(e): 12925-008; 12926-002; 12930-040; 12930-045; 12930-075; 12930-082; 12930-087; 13077-018; 13077-021; 13077-035; 13077-057; 13078-019; 13200-012; 13200-024; 13200-026; 13200-032; 13200-059; 13200-074; 13201-005; 13368-040; 362; 54301-002; 54301-010; 54301-023; ALBEX lander; Bengal; BENGAL; Benthic Biology and Geochemistry of a North-eastern Atlantic Abyssal Locality; CH135; Challenger; D222/1; D222/2; D226; D229; D231; D236; DI236_11-1; Discovery (1962); GBGL; GBGL-01; GBGL-02; Göteborg lander; M36/6; M36/6_MC33; M42/2; M42/2_365; M42/2_367; M42/2_377-6; M42/2_381; M42/2_397-1; M42/2_422; M42/2_425; M42/2_432-1; M42/2_433; M42/2_MC2; M42/2_MC28; M42/2_MC30; M42/2_MC32; M42/2_MC34; M42/2_MC5; M42/2_MC9; MCB57; MCS; Meteor (1986); MUC; MultiCorer; MultiCorer, small; MultiCorer Barnett pattern (12-57); NIOZL
    Materialart: Dataset
    Format: application/zip, 33 datasets
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    DATA PANGAEA
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