Nauru Ocean Resources (NORI), a subsidiary of The Metals Company (NASDAQ: TMC), has begun sharing emerging data on the impacts of seafloor sediment plumes one year after its 2022 test mining campaign. Verified by testing, NORI says the sediment forms a plume that hugs the seafloor and does not loft into the water column to be transported long distances.
TMC holds exploration and commercial rights to three areas in the Clarion Clipperton zone of the Pacific Ocean between Mexico and Hawaii. NORI is assessing the potential of mining nodules of critical minerals from the seafloor. So far about 3,000 tonnes of nodules have been collected.
During the period of nodule collection in 2022 NORI worked with DHI Water and Environment, experts on sedimentation modelling, to set up a plume monitoring study. Over 50 assets and marine sensors were deployed over the 4 x 2 km test field. They collected data on all aspects of plume dynamics, concentration, and dispersal from which DHI generated a verified plume model.
Based on laboratory predictions and field observations by other contractors, the evidence shows that the sediment plume at the seafloor is low-lying. The dispersal of the mud is influenced by gravity and the contours of the seafloor, not by ocean currents, TMC says.
“Models put forward by some activist groups claiming a vast area of impact are undermined by their lack of appreciation that the benthic plume forms a turbidity current spreading under its own weight away from the collector tracks, underlining the importance of investing in the science before engaging in speculation,” said NORI environmental manager Dr. Michael Clarke.
Seafloor mining is a much-debated topic. Environmental groups and NGOs are opposed. Greenpeace members recently occupied the NORI vessel until a Dutch court ordered them off.
The Metals Company is planning to begin deep sea mining by late-2025.
Comments
RG
The author fails to mention that the Clarion Clipperton Zone, where TMC will be applying to mine nodules from the seafloor, is a barren desert of nearly zero life. It’s the exact opposite of the coral reef laden visual depicted here in this piece. To say that Norway is the only country with legislators that support deep sea mining is either maliciously misrepresenting the facts or is ignorance. Over 30 US congressional legislators recently signed a petition in support of DSM. Many countries support responsible DSM as a MUCH more environmentally friendly way to source the metals needed to achieve our green energy objectives. The only countries that strongly oppose DSM are those that have deep interests in the status quo by way of land based mining that is destroying our rainforests and polluting our waterways. Look at what is happening in Indonesia if you want to learn more.