The Highest Grade Manganese in the World Sits Under U.S. Water. Nobody Has Financed It Yet.
American Samoa has the resource, the harbor, and now the federal runway. What it does not have is the operator willing to move first. By Don Southerton, Founder and CEO, Bridging Culture Worldwide, and Managing Director, Critical Mineral Ventures, and Strategic Advisor ASEDC. Start with a number that does not get enough attention. The polymetallic nodules in the American Samoa exclusive economic zone run at roughly 28 percent manganese by weight . That is the highest natural concentration of any known commercial deposit anywhere in the world . Manganese is the quiet bottleneck in the battery supply chain . LFP and LMFP chemistry is scaling fast for grid storage and lower cost EVs, and both need battery grade manganese in volume. Processing capacity outside China is critically thin. The same nodule fields also carry nickel, cobalt, and copper , the exact four metals inside every EV battery cathode. Deposits closest to the territory are estimated at 10 billion tons of high grade o...