http://rendezvous.blogs.nytimes.com/
LONDON — Whatever happened to manganese nodules? As newly announced plans to mine the mineral wealth of asteroids generate a mixture of excitement and skepticism, it is worth recalling the fate of an earlier craze to exploit a potential metals bonanza somewhat closer to home.
From the early 1970s, the prospect of hauling up a boundless harvest of metal rich nodules from the deepest ocean beds was touted as the answer to the world’s increasing hunger for diminishing resources. The potato-size rocks that carpet the deep seabed — commonly known as manganese nodules — also contain a mix of other elements, including copper, cobalt and nickel.
Governments and private companies joined the treasure hunt as explorations were launched to determine whether projects to vacuum the nodules from miles below the ocean’s surface were commercially viable.
Lockheed Martin led a consortium of companies in an effort to develop a commercial mining operation, collecting thousands of nodules from an area of the Pacific Ocean between Hawaii and Mexico as part of an effort that would today cost more than $500 million.
Howard Hughes, the reclusive American tycoon, fueled the frenzy with the launch of the Glomar Explorer, a 618-foot ship he said was built to mine the manganese nodules. (It was, in fact, cover for a secret C.I.A. project to raise a sunken Soviet submarine.)