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Pecher, Ingo A; Villinger, Heinrich; Kaul, Norbert; Crutchley, Gareth J; Mountjoy, Joshu J; Huhn, Katrin; Kukowski, Nina; Henrys, Stuart A; Rose, Paula S; Coffin, Richard C (2017): Heat flow profile HF1625 across Hikurangi Margin, New Zealand during SONNE cruise SO247 (SlamZ) [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.878106, Supplement to: Pecher, Ingo A; Villinger, Heinrich; Kaul, Norbert; Crutchley, Gareth J; Mountjoy, Joshu J; Huhn, Katrin; Kukowski, Nina; Henrys, Stuart A; Rose, Paula S; Coffin, R B (2017): A Fluid Pulse on the Hikurangi Subduction Margin: Evidence From a Heat Flux Transect Across the Upper Limit of Gas Hydrate Stability. Geophysical Research Letters, 44(24), 12,385-12,395, https://doi.org/10.1002/2017GL076368

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Published: 2017-07-24 • DOI registered: 2017-09-18

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Abstract:
A transect of seafloor heat probe measurements on the Hikurangi Margin shows a significant increase of thermal gradients upslope of the pinchout of the base of gas hydrate stability. We attribute these anomalously high thermal gradients to a fluid pulse leading to advective heat flow while endothermic cooling from gas hydrate dissociation may arrest temperature gradients in the hydrate stability field. Double-bottom simulating reflections in the study area are likely to be caused by uplift based on gas hydrate phase boundary considerations. Previous studies predict a seamount on the subducting Pacific Plate to cause significant overpressure beneath our study area, which may be the source of the fluid pulse. We suggest this seamount may also cause the inferred uplift. Transient expulsion of warm fluids may lead to gas hydrate dissociation with potential implications for seafloor stability.
Coverage:
Median Latitude: -38.645485 * Median Longitude: 178.666136 * South-bound Latitude: -38.658070 * West-bound Longitude: 178.639030 * North-bound Latitude: -38.632750 * East-bound Longitude: 178.691400
Date/Time Start: 2016-04-13T07:52:10 * Date/Time End: 2016-04-13T18:08:10
Comment:
Heat flow profile HF1625 across Hikurangi Margin, New Zealand. The heat flow profile is measured along seismic line No. 24 of R/V Tangaroa's cruise TAN 1114 (2011). The area and this profile is of particular interest because of the occurrence of a double-BSR.
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
15 datasets

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Datasets listed in this publication series

  1. Pecher, IA; Villinger, H; Kaul, N et al. (2017): Heat flow data at station SO247_55-1. https://doi.org/10.1594/PANGAEA.878092
  2. Pecher, IA; Villinger, H; Kaul, N et al. (2017): Heat flow data at station SO247_55-3. https://doi.org/10.1594/PANGAEA.878101
  3. Pecher, IA; Villinger, H; Kaul, N et al. (2017): Heat flow data at station SO247_55-4. https://doi.org/10.1594/PANGAEA.878102
  4. Pecher, IA; Villinger, H; Kaul, N et al. (2017): Heat flow data at station SO247_55-5. https://doi.org/10.1594/PANGAEA.878103
  5. Pecher, IA; Villinger, H; Kaul, N et al. (2017): Heat flow data at station SO247_55-6. https://doi.org/10.1594/PANGAEA.878104
  6. Pecher, IA; Villinger, H; Kaul, N et al. (2017): Heat flow data at station SO247_55-7. https://doi.org/10.1594/PANGAEA.878108
  7. Pecher, IA; Villinger, H; Kaul, N et al. (2017): Heat flow data at station SO247_55-8. https://doi.org/10.1594/PANGAEA.878105
  8. Pecher, IA; Villinger, H; Kaul, N et al. (2017): Heat flow data at station SO247_55-10. https://doi.org/10.1594/PANGAEA.878093
  9. Pecher, IA; Villinger, H; Kaul, N et al. (2017): Heat flow data at station SO247_55-12. https://doi.org/10.1594/PANGAEA.878094
  10. Pecher, IA; Villinger, H; Kaul, N et al. (2017): Heat flow data at station SO247_55-13. https://doi.org/10.1594/PANGAEA.878095
  11. Pecher, IA; Villinger, H; Kaul, N et al. (2017): Heat flow data at station SO247_55-14. https://doi.org/10.1594/PANGAEA.878096
  12. Pecher, IA; Villinger, H; Kaul, N et al. (2017): Heat flow data at station SO247_55-15. https://doi.org/10.1594/PANGAEA.878097
  13. Pecher, IA; Villinger, H; Kaul, N et al. (2017): Heat flow data at station SO247_55-16. https://doi.org/10.1594/PANGAEA.878098
  14. Pecher, IA; Villinger, H; Kaul, N et al. (2017): Heat flow data at station SO247_55-17. https://doi.org/10.1594/PANGAEA.878099
  15. Pecher, IA; Villinger, H; Kaul, N et al. (2017): Heat flow data at station SO247_55-18. https://doi.org/10.1594/PANGAEA.878100