English translation: Carolyn Engel-Gautier

Mission accomplished!

The Cypress hydrothermal vent in the Lucky Strike vent field. Photo Victor

The night was fruitful and we were able to perform most of the operations that had been planned: sampling fluids and fauna, deploying the last temperature probes and artificial substrates, testing the seismic alarm on the OBS at the SEAMON West node. A sense of urgency filled the ROV control room. Operation after operation was carried out, with the final, immutable deadline looming at 0730. Some of the operations had to be cut short. Before leaving the area, the last two OBS and the physical oceanography mooring were launched from on board. Mission accomplished!

The last day will be spent writing reports, straightening up the labs and finishing up analyses and sorting. The first phase of our project has come to a close, the instruments have been moored on the seafloor and the observatory data has begun to feed the database. At the end of the cruise, participating scientists will be able to continuously monitor the variations in temperature, in pressure and physico-chemical conditions as well as in the seismic activity of the area and observe the highly unusual hydrothermal fauna in action. The knowledge gleaned from this data will help better manage the resources found in the area, which became a protected marine area in 2006 as part of the OSPAR network.

Sampling deep-sea mussels. Photo Victor.

The IPGP group preparing the OBSs. Photo Jérôme Blandin.

Antonio preparing the physical oceanography mooring. Photo Jérôme Blandin.

Valérie and Cédric extracting the fluids contained in the titanium bottles. Photo Céline Rommeveaux-Jestin

Busy on the deck. Photo Céline Rommeveaux-Jestin.