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Loher, Markus; Pape, Thomas; Marcon, Yann; Römer, Miriam; Wintersteller, Paul; Praeg, Daniel; Torres, Marta E; Sahling, Heiko; Bohrmann, Gerhard (2017): Temperature, chloride and sulfate measurements of samples from RV METEOR cruise M112. PANGAEA, https://doi.org/10.1594/PANGAEA.883466, Supplement to: Loher, M et al. (2018): Mud extrusion and ring-fault gas seepage – upward branching fluid discharge at a deep-sea mud volcano. Scientific Reports, 8, 6275, https://doi.org/10.1038/s41598-018-24689-1

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Abstract:
Submarine mud volcanoes release sediments and gas-rich fluids at the seafloor via deeply-rooted plumbing systems that remain poorly understood. Here the functioning of Venere mud volcano, on the Calabrian accretionary prism in ~1,600 m water depth is investigated, based on multi-parameter hydroacoustic and visual seafloor data obtained using ship-borne methods, ROVs, and AUVs. Two seepage domains are recognized: mud breccia extrusion from a summit, and hydrocarbon venting from peripheral sites, hosting chemosynthetic ecosystems and authigenic carbonates indicative of long-term seepage. Pore fluids in freshly extruded mud breccia (up to 13 °C warmer than background sediments) contained methane concentrations exceeding saturation by 2.7 times and chloride concentrations up to five times lower than ambient seawater. Gas analyses indicate an underlying thermogenic hydrocarbon source with potential admixture of microbial methane during migration along ring faults to the peripheral sites. The gas and pore water analyses point to fluids sourced deep (>3 km) below Venere mud volcano. An upward-branching plumbing system is proposed to account for co-existing mud breccia extrusion and gas seepage via multiple surface vents that influence the distribution of seafloor ecosystems. This model of mud volcanism implies that methane-rich fluids may be released during prolonged phases of moderate activity.
Coverage:
Median Latitude: 38.607437 * Median Longitude: 17.192567 * South-bound Latitude: 38.590483 * West-bound Longitude: 17.187017 * North-bound Latitude: 38.618367 * East-bound Longitude: 17.209400
Date/Time Start: 2014-11-09T22:13:00 * Date/Time End: 2014-12-09T12:58:00
Comment:
Temperature data from temperature stick (T-Stick) handled by remotely operated vehicle (ROV) MARUM QUEST 4000 during RV METEOR cruise M112.
Temperature data from miniaturized temperature loggers (MTLs) mounted on a gravity corer (GC) obtained during RV METEOR cruise M112.
Chloride and sulfate pore water data obtained from push cores handled by ROV MARUM QUEST 4000 and gravity cores during RV METEOR cruise M112.
Size:
26 datasets

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Datasets listed in this publication series

  1. Loher, M; Pape, T; Marcon, Y et al. (2017): Chloride and sulfate pore water analysis of sediment core GeoB19230-5. https://doi.org/10.1594/PANGAEA.883397
  2. Loher, M; Pape, T; Marcon, Y et al. (2017): Chloride and sulfate pore water analysis of sediment core GeoB19236-1. https://doi.org/10.1594/PANGAEA.883398
  3. Loher, M; Pape, T; Marcon, Y et al. (2017): Chloride and sulfate pore water analysis of sediment core GeoB19240-10. https://doi.org/10.1594/PANGAEA.883399
  4. Loher, M; Pape, T; Marcon, Y et al. (2017): Chloride and sulfate pore water analysis of sediment core GeoB19242-10. https://doi.org/10.1594/PANGAEA.883400
  5. Loher, M; Pape, T; Marcon, Y et al. (2017): Chloride and sulfate pore water analysis of sediment core GeoB19242-11. https://doi.org/10.1594/PANGAEA.883401
  6. Loher, M; Pape, T; Marcon, Y et al. (2017): Chloride and sulfate pore water analysis of sediment core GeoB19242-14. https://doi.org/10.1594/PANGAEA.883402
  7. Loher, M; Pape, T; Marcon, Y et al. (2017): Chloride and sulfate pore water analysis of sediment core GeoB19242-17. https://doi.org/10.1594/PANGAEA.883403
  8. Loher, M; Pape, T; Marcon, Y et al. (2017): Chloride and sulfate pore water analysis of sediment core GeoB19242-6. https://doi.org/10.1594/PANGAEA.883404
  9. Loher, M; Pape, T; Marcon, Y et al. (2017): Chloride and sulfate pore water analysis of sediment core GeoB19245-1. https://doi.org/10.1594/PANGAEA.883405
  10. Loher, M; Pape, T; Marcon, Y et al. (2017): Chloride and sulfate pore water analysis of sediment core GeoB19249-7. https://doi.org/10.1594/PANGAEA.883406
  11. Loher, M; Pape, T; Marcon, Y et al. (2017): Chloride and sulfate pore water analysis of sediment core GeoB19267-4. https://doi.org/10.1594/PANGAEA.883407
  12. Loher, M; Pape, T; Marcon, Y et al. (2017): Temperature measurements at T-Stick ROV station GeoB19202-2. https://doi.org/10.1594/PANGAEA.883454
  13. Loher, M; Pape, T; Marcon, Y et al. (2017): Temperature measurements at T-Stick ROV station GeoB19221-3. https://doi.org/10.1594/PANGAEA.883455
  14. Loher, M; Pape, T; Marcon, Y et al. (2017): Temperature measurements at T-Stick ROV station GeoB19221-5. https://doi.org/10.1594/PANGAEA.883456
  15. Loher, M; Pape, T; Marcon, Y et al. (2017): Temperature measurements at T-Stick ROV station GeoB19230-10. https://doi.org/10.1594/PANGAEA.883457
  16. Loher, M; Pape, T; Marcon, Y et al. (2017): Temperature measurements at T-Stick ROV station GeoB19230-3. https://doi.org/10.1594/PANGAEA.883458
  17. Loher, M; Pape, T; Marcon, Y et al. (2017): Temperature measurements at T-Stick ROV station GeoB19240-4. https://doi.org/10.1594/PANGAEA.883459
  18. Loher, M; Pape, T; Marcon, Y et al. (2017): Temperature measurements at T-Stick ROV station GeoB19242-13. https://doi.org/10.1594/PANGAEA.883460
  19. Loher, M; Pape, T; Marcon, Y et al. (2017): Temperature measurements at T-Stick ROV station GeoB19242-16. https://doi.org/10.1594/PANGAEA.883461
  20. Loher, M; Pape, T; Marcon, Y et al. (2017): Temperature measurements at T-Stick ROV station GeoB19242-4. https://doi.org/10.1594/PANGAEA.883462
  21. Loher, M; Pape, T; Marcon, Y et al. (2017): Temperature measurements at T-Stick ROV station GeoB19242-7. https://doi.org/10.1594/PANGAEA.883463
  22. Loher, M; Pape, T; Marcon, Y et al. (2017): Temperature measurements at T-Stick ROV station GeoB19249-3. https://doi.org/10.1594/PANGAEA.883464
  23. Loher, M; Pape, T; Marcon, Y et al. (2017): Temperature measurements at T-Stick ROV station GeoB19267-7. https://doi.org/10.1594/PANGAEA.883465
  24. Loher, M; Pape, T; Marcon, Y et al. (2017): Temperature measurements of sediment core GeoB19248-2. https://doi.org/10.1594/PANGAEA.883414
  25. Loher, M; Pape, T; Marcon, Y et al. (2017): Temperature measurements of sediment core GeoB19248-3. https://doi.org/10.1594/PANGAEA.883415
  26. Loher, M; Pape, T; Marcon, Y et al. (2017): Temperature measurements of sediment core GeoB19248-4. https://doi.org/10.1594/PANGAEA.883416