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  • 1
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    TRACTION - a transport reaction model specifically designed to account for non-ideal transport and reaction effects (2018)
    PANGAEA
    In:  Supplement to: Haffert, Laura; Haeckel, Matthias (2019): Quantification of non-ideal effects on diagenetic processes along extreme salinity gradients at the Mercator mud volcano in the Gulf of Cadiz. Geochimica et Cosmochimica Acta, 244, 366-382, https://doi.org/10.1016/j.gca.2018.09.038
    Details
    Publication Date: 2023-01-13
    Description: Presented is an example of the transport-reaction code (TRACTION) applied to the simulation of pore water species in the seawater mixing zone at Mercator Mud volcano in the Gulf of Cadiz. TRACTION was specifically designed to account for non-ideal transport effects in the presence of thermodynamic (e.g. salinity or temperature) gradients. The model relies on the most fundamental concept of solute diffusion, which states that the chemical potential gradient (Maxwell's model) rather than the concentration gradient (Fick's law) is the driving force for diffusion. In turn, this requires accounting for species interactions by applying Pitzer's method to derive species chemical potentials and Onsager coefficients instead of using the classical diffusion coefficients. Electrical imbalances arising from varying diffusive fluxes in multicomponent systems, like seawater, are avoided by applying an electrostatic gradient as an additional transport contribution.
    Type: Dataset
    Format: application/zip, 1.4 MBytes
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  • 2
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    Porosity data for sediment cores taken in small-scale disturbance tracks and undisturbed reference sites during SONNE cruise SO239 in the Clarion-Clipperton Zone (CCZ) (2019)
    PANGAEA
    In:  Supplement to: Volz, Jessica B; Haffert, Laura; Haeckel, Matthias; Koschinsky, Andrea; Kasten, Sabine (2020): Impact of small-scale disturbances on geochemical conditions, biogeochemical processes and element fluxes in surface sediments of the eastern Clarion-Clipperton Zone, Pacific Ocean. Biogeosciences, 17(4), 1113-1131, https://doi.org/10.5194/bg-17-1113-2020
    Details
    Publication Date: 2024-02-02
    Description: This dataset comprises porosity data from undisturbed reference sites sampled by a multiple corer (MUC) and disturbed push-cores (PUC), which were retrieved using the ROV Kiel 6000 (GEOMAR) during RV SONNE expedition SO239 in 2015. During this cruise, different European contract areas for the exploration of polymetallic nodules in the area of the Clarion-Clipperton Zone (CCZ) were visited (BGR, IOM, GSR, IFREMER), which are currently being explored in light of potential future deep-sea mining. The PUCs were taken in several small-scale disturbance tracks, which were created 1 day to 37 years before sampling for the simulation of deep-sea mining activities in the different exploration areas. The sampled disturbance tracks include 1-day- and 3-year-old EBS tracks (created with an Epibenthic sledge), 8-months- and 37-year-old dredge tracks, and a 20-year-old track from the Benthic Impact Experiment in the IOM area (IOM-BIE). The dataset was produces in the laboratories of the Alfred Wegener Institute (AWI) Bremerhaven, Germany.
    Keywords: Area/locality; CCZ; Deep-sea mining; DEPTH, sediment/rock; Elevation of event; Event label; Experiment; GC; GC2; Gravity corer; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Latitude of event; Longitude of event; MUC; MultiCorer; Multicorer with television; North Pacific Ocean; oxygen penetration depth; polymetallic nodules; Porosity, volume; PUC; Push corer; redox zonation; Salt-corrected; SO239; SO239_121-1; SO239_175-1; SO239_39-1; SO239_62-1; SO239_66-1; SO239_84-1; SO239_87-1; SO239-101-1_PUC2; SO239-131-1_PUC2; SO239-141-1_PUC2; SO239-157-1_PUC2; SO239-161-1_PUC29; SO239-41-1_PUC2; SO239-64-1_PUC2; solid-phase manganese; Sonne_2; TVMUC; Type
    Type: Dataset
    Format: text/tab-separated-values, 1476 data points
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  • 3
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    Solid-phase TOC and bulk Mn data for sediment cores taken in small-scale disturbance tracks during SONNE cruise SO239 in the Clarion-Clipperton Zone (CCZ) (2019)
    PANGAEA
    In:  Supplement to: Volz, Jessica B; Haffert, Laura; Haeckel, Matthias; Koschinsky, Andrea; Kasten, Sabine (2020): Impact of small-scale disturbances on geochemical conditions, biogeochemical processes and element fluxes in surface sediments of the eastern Clarion-Clipperton Zone, Pacific Ocean. Biogeosciences, 17(4), 1113-1131, https://doi.org/10.5194/bg-17-1113-2020
    Details
    Publication Date: 2024-02-02
    Description: This dataset comprises solid-phase total organic carbon contents (TOC) and bulk sediment manganese contents from disturbed push-cores (PUC), which were retrieved using the ROV Kiel 6000 (GEOMAR) during RV SONNE expedition SO239 in 2015. During this cruise, different European contract areas for the exploration of polymetallic nodules in the area of the Clarion-Clipperton Zone (CCZ) were visited (BGR, IOM, GSR, IFREMER), which are currently being explored in light of potential future deep-sea mining. The PUCs were taken in several small-scale disturbance tracks, which were created 1 day to 37 years before sampling for the simulation of deep-sea mining activities in the different exploration areas. The sampled disturbance tracks include 1-day- and 3-year-old EBS tracks (created with an Epibenthic sledge), 8-months- and 37-year-old dredge tracks, and a 20-year-old track from the Benthic Impact Experiment in the IOM area (IOM-BIE). The dataset was produces in the laboratories of the Alfred Wegener Institute (AWI) Bremerhaven, Germany.
    Keywords: Area/locality; Carbon, organic, total; CCZ; Deep-sea mining; DEPTH, sediment/rock; Elevation of event; Event label; Experiment; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; Latitude of event; Longitude of event; Manganese; oxygen penetration depth; polymetallic nodules; PUC; Push corer; redox zonation; Salt-corrected; SO239; SO239-101-1_PUC2; SO239-131-1_PUC2; SO239-141-1_PUC2; SO239-157-1_PUC2; SO239-161-1_PUC29; SO239-41-1_PUC2; SO239-64-1_PUC2; solid-phase manganese; Sonne_2
    Type: Dataset
    Format: text/tab-separated-values, 551 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
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