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Managing the Next Gold Rush

The seafloor is rich in rare-earth elements and other sought-after minerals, but it also contains barely understood components of the global ecosystem. In pursuing these precious resources, the international community must proceed with care, so as not to trigger an environmental catastrophe.

WASHINGTON, DC – The International Seabed Authority (ISA) sits perched above the concrete boardwalk of Jamaica’s Kingston Harbor, across the bay from the spot where “Calico Jack” Rackham was once gibbeted as a warning to other eighteenth-century pirates. Today, this small United Nations agency rules the high seas – or, more precisely, the seafloor some three miles below – and yet it is largely unknown to the general public. But if China decides to retaliate against US import tariffs by restricting its exports of rare-earth elements, that could change fast.

Some 71% of the Earth’s surface is actually underwater, and the seafloor (or seabed) is rich in rare-earth elements and other sought-after minerals – especially in deep international waters. The ISA manages the mineral rights of more than 50% of the world’s deep ocean floor, and its 168 member states have the right to vie for access to the resources there. But, given the risk of catastrophic environmental consequences, all countries could lose out if this contest proceeds without due care.

Undersea minerals tend to be clustered in potato-shaped chunks of rock nestled on abyssal plains, vented in boiling-hot water from fissures in the seafloor, and crusted along the flanks of extinct underwater volcanoes called seamounts. Generally, the concentrations of minerals in these formations are much higher than in ores on dry land.

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