base ore

base ore

[′bās ‚ȯr]
(mining engineering)
Ore in which the gold is associated with sulfides, as contrasted with free-milling ores in which the sulfides have been removed by leaching.
References in periodicals archive ?
It is estimated that at least 400,000 tons of base ore are to be processed by WNCP.
LCV's base ore targeted objectives are just east of the Cabinet Mountains on the Libby and Ramsey Creek drainage basins.
The Institute's researchers are internationally known for their work on microbiological methods for leaching metals from base ores, enhancement of oil recovery, purification of solid waste and sewage, reduction of methane concentrations in coal mines, and production medical products from fungi.