It was first described in 1813 from the Zlat?Hory polymetallic ore deposit in Moravia, Czech Republic.
12.
Polymetallic and other deposits are known in the area, including arsenic, bismuth, lead and silver.
13.
Gold recovered as a byproduct from the concentrates of Peru s polymetallic mines amounted to 2.6 t.
14.
The ore was polymetallic and from it copper, lead, silver, gold, arsenic and germanium were won.
15.
Meteoric iron was highly prized throughout the Himalaya where it was included in sophisticated polymetallic alloys such as Panchaloha for ritual implements.
16.
Interest in the potential exploitation of polymetallic nodules generated a great deal of activity among prospective mining consortia in the 1960s and 1970s.
17.
It took the team 10 underwater exploration trips since 1997 to find the polymetallic sulfide deposit after 15 years of observation from boats, Yuasa said.
18.
The Authority's main legislative accomplishment to date has been the adoption, in the year 2000, of regulations governing exploration for polymetallic nodules.
19.
Compass suspended its work on the polymetallic proposal in 2002 when low metal prices caused the withdrawal of Compass s financial partner ( Doe Run ).
20.
The total amount of polymetallic nodules on the sea floor was estimated at 500 billion tons by Alan A . Archer of the London Geological Museum in 1981.
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