Metal fluxes and resource potential at the slow-spreading TAG mid-ocean ridge segment (26°N, MAR) - Blue Mining @ Sea - Cruise No. M127 - May 25 - June 28, 2016 - Bridgetown (Barbados) - Ponta Delgada (Portugal) (English)

2017
  • ISSN:
  • Report  /  Electronic Resource

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Cruise M127 is an integral part of the EU-FP7 project 'Blue Mining: Breakthrough Solutions for the Sustainable Deep Sea Mining Value Chain' and is addressing research questions regarding the nature, exploration, and resource potential of marine minerals. The cruise left from Bridgetown (Barbados) in the evening of May 25th and reached the working area at 26°N on the Mid-Atlantic Ridge on May 30th (Fig.1.1). One of the main tasks during the cruise was mapping of the TAG segment (26°N) in various resolutions. This included ship-based multibeam mapping as well as high-resolution mapping using an AUV. The AUV was used on 19 missions, usually with survey times close to the seafloor of between 10 and 12 hours. Most dives provided maps with a resolution of <2 m and collected a number of other geophysical parameters (magnetics, self-potential, Eh, temperature) at the same time. Seismic work, as the 2nd important part of the cruise, included refraction and reflection seismics with airgun shots and multichannel seismic streamer records being compiled along 49 profiles on 8 survey runs (230 nautical miles in total length). Additionally, 22 OBS, 9 OBH, and 6 OBEM were deployed. Sampling with HyBis and gravity coring aided the testing of exploration methodology including ship-board chemical and mineralogical analyses. Station work in the working area ended on 20:30 LT on June 23rd when the 5 day transit to Ponta Delgada was started. During the transits from and to the working area 3 ARGO floats were deployed and the ship-based multibeam and the 75-kHz ADCP collected data in international waters. Cruise M127 ended 09:00 LT of June 28th with docking in Ponta Delgada.

  • Title:
    Metal fluxes and resource potential at the slow-spreading TAG mid-ocean ridge segment (26°N, MAR) - Blue Mining @ Sea - Cruise No. M127 - May 25 - June 28, 2016 - Bridgetown (Barbados) - Ponta Delgada (Portugal)
  • Author / Creator:
  • Published in:
    METEOR-Berichte ; M127 ; 1-58
  • Publisher:
    DFG-Senatskommission für Ozeanographie
  • Place of publication:
    Bremen
  • Year of publication:
    2017
  • Size:
    58 pages
  • ISSN:
  • DOI:
  • Type of media:
    Report
  • Type of material:
    Electronic Resource
  • Language:
    English
  • Classification:
    DDC:    550 Earth sciences and geology
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