Deep-Sea Mining Robot Completes Pacific Manganese Nodule Collection Test: 200 Tons Per Day

Deep-Sea Mining Robot Completes Pacific Manganese Nodule Collection Test: 200 Tons Per Day

On March 1, 2028, Canadian mining company The Metals Company (TMC) announced that its deep-sea mining robot system Nauru-1 completed a 30-day manganese nodule collection test in the Clarion-Clipperton Zone (CCZ) of the Pacific Ocean. The system extracted 200 tons of ore per day — a 4x improvement over the previous generation.

Manganese nodules are potato-sized mineral concretions scattered across the deep seafloor at depths of 4,000 to 6,000 meters. They are rich in nickel, cobalt, manganese, and copper — critical raw materials for EV batteries and renewable energy equipment. The CCZ alone contains enough manganese nodules to meet 20 years of global nickel demand.

Technical Architecture

The Nauru-1 system consists of three components: a 30-ton seabed collection robot, a vertical transport pipeline, and a surface mother ship. The collection robot moves across the seafloor at 0.5 meters per second, using hydraulic suction to extract manganese nodules from the sediment layer, then transporting them to the surface via vertical pipeline for initial sorting and storage.

TMC CEO Gerard Barron said: 'Nauru-1's design philosophy is minimizing seafloor ecological disturbance. The robot's collection path is AI-optimized to avoid known biodiversity hotspots. Field data shows seafloor ecological disturbance is limited to 15% of the total collection area.'

Environmental Controversy

The environmental impact of deep-sea mining has been contentious. The Deep Sea Conservation Coalition (DSCC) issued a statement opposing any form of commercial deep-sea mining. A DSCC science advisor said: 'Deep-sea ecosystems recover extremely slowly — manganese nodules form at a rate of a few millimeters per million years. Once collected, these ecosystems cannot recover on human timescales.'

TMC responded that its collection plan has passed independent environmental impact assessment and committed to establishing 10x-area protected zones around each collection site. The company also said it is developing selective collection technology to extract only high-grade nodules, reducing disturbance to seafloor sediments.

Geopolitics

Deep-sea mineral development has sparked a new round of geopolitical competition. The International Seabed Authority (ISA) is developing deep-sea mining regulations but progress has been slow. China, Russia, and Norway have submitted extensive deep-sea mining area exploration applications.

The US has not ratified the UN Convention on the Law of the Sea, limiting its formal voice within the ISA framework. However, the US State Department stated that deep-sea minerals are critical to US energy security and defense industrial base, and is exploring alternative international cooperation mechanisms.