The Graviluck and Momareto missions have just drawn to a close. Their goal was to set up a fully operational laboratory for the observation and analysis of the sea floor on the Mid-Atlantic Ridge in the
The objective of the Graviluck mission was to study the structure and dynamics of this crust. Onboard two ships, the researchers measured seafloor spreading by installing pressure sensors coupled with altimeters with satellite link-ups. With this data, they are hoping to improve their models and explain the activity of the area studied by MoMar.
The aim of the Momareto mission was to study deep-sea biodiversity, and initial observations have been extremely fruitful. The seagoing researchers were able to map the fauna around the Lucky Strike volcano (Altitude 1700 m). This was the first ever in-depth study of such an ecosystem, and researchers are now back on shore analyzing the gathered data. Among the samples collected, the researchers are especially interested in a species of giant mussel which can measure up to 20 cm in width. They have left an instrument-equipped observation module in the vicinity of volcano to observe the mussels' movements over a year. The next seafloor expedition is expected to take place in the summer of 2007.
1. Institut français de recherche pour l'exploitation de la mer: www.ifremer.fr/anglais/
2. Institut national des sciences de l'univers (CNRS).