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Most of the ore body is zinc-lead-silver-gold-barium rich; some zones have elevated copper values.
Minor gold and copper values constitute this zone.
Before its first closure in 1788, Dolcoath was estimated to have produced tin and copper valued at least £1,250,000.
Intensive drilling has located numerous strongly altered and brecciated zones, some with associated gold and copper values.
Gold and copper values occupy a northeast-trending iron formation within the Net Lake-Vermilion Lake Deformation Zone.
Pairs of brooches often have similar values of silver, but some reveal significant differences in copper values indicating they were not made from the same batch of metal.
The company leased the old Port Radium settlement from Eldorado Mining and Refining Limited and used the old camp and mill to recover silver and copper values.
Thiosulfate leaching has been proven to be effective on ores with high soluble copper values or ores which experience preg-robbing: the absorption by carbonaceous components which preferentially absorbs gold and gold-cyanide complexes.
In the 27 years of operation, except for 2 years of shutdown, Kennecott produced 4.625 million tons of ore averaging 13 per cent copper valued at roughly $207,000,000 with an estimated profit of $100,000,000.
The name Covad is derived from acronyms which have varied over time, including COmbined Voice And Data, Copper Over Voice And Data, and in its earliest form, COpper Value ADded.
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