TMC the metals company Inc. (Nasdaq: TMC) has submitted a major deep‑sea environmental dataset to the International Seabed Authority’s (ISA) DeepData public database, marking a significant milestone in transparency and scientific contribution related to deep‑ocean minerals development.
The submission, completed by TMC subsidiaries Nauru Ocean Resources Inc. (NORI) and Tonga Offshore Mining Ltd. (TOML), covers nearly a decade of exploration activity in the Clarion‑Clipperton Zone (CCZ) of the Pacific Ocean. The dataset includes results from 777 equipment deployments and more than 4,800 environmental samples, generating 76,000 biological records and 69,000+ geochemical data points spanning the water column from the surface to depths exceeding 4,000 metres.
The latest upload builds on earlier submissions made in March 2023 and May 2024, which together comprise one of the most comprehensive environmental monitoring programmes ever undertaken for deep‑sea minerals. With this submission, TMC’s subsidiaries now account for roughly one‑third of all CCZ data held in DeepData. Once published to UNESCO’s Ocean Biodiversity Information System (OBIS), TMC data are expected to represent more than half of all biological records available for the region.
TMC said the dataset underpins findings from its US$250M environmental research programme, which has already supported 37 peer‑reviewed scientific publications. The company is also launching a new video series highlighting key research outcomes, demonstrating how the data addresses environmental concerns and how design innovations have reduced the impact footprint of TMC’s nodule collection system compared to legacy technologies.
Dr Michael Clarke, environmental manager at TMC, commented, “After more than a decade of research, 27 expeditions, rigorously monitored pilot mining tests, and tens of thousands of biological records and seafloor images, we’ve built one of the most comprehensive deep‑sea environmental datasets ever assembled. Backed by more than US$250M of investment, our findings corroborate decades of prior research, including NOAA’s Deep Ocean Mining Environmental Study programme.”
With its Environmental Impact Assessment now complete, TMC said it is actively sharing insights from this body of work as part of its commitment to open science, regulatory compliance and informed policy discussions around deep‑sea minerals development.
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