Geology Folder

Both the Clarion-Clipperton Zone and the Cook Islands EEZ contain polymetallic nodules that appear superficially similar. However, there are differences in composition between the two zones that critically impact project economics.

Polymetallic sulphide deposits form at hydrothermal vent sites, and are rich sources of metals such as copper, zinc, gold and silver.

Polymetallic nodules are small spheroidal "rocks" that form over millions on years on the deep seabed. They consist of large amounts of precious metals, and present a compelling prospect for sea bed mining.

Cobalt-Rich Crusts are formed by metal minerals precipitating out of seawater to form crusts.