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1 Study Summary
Gerpa put forward a five-stage work method: (1) define the subject, time frame
and objectives, (2) identify the key variables and their relationships, (3) explore the
possible evolutions of the key variables (sets of hypotheses), (4) build scenarios
exploring the context and sector, (5) identify the challenges for each scenario and
explore the consequences in terms of research and development for technologies
and in terms of actions for the partners concerned.
In the final phase, the group restructured the results and their presentation in
order to facilitate their operational use.
During the framework definition phase, four types of sites and their associated
resources were selected (cf. Fig. 1.2): cobalt-rich and platinum-rich crusts, hydrothermal sulphides, polymetallic nodules and natural hydrogen production sites.
The group conducted a wider study on the mining potential of these sites by considering four types of interest: scientific, economic, strategic (supply security) and
heritage (long term resources).
Nodules
Crusts
Hydrothermal
sulphides
Fig. 1.2  Types of deep-sea mineral deposits