gold ore

Certain iron, uranium and even gold ores are thought to have formed as the result of microbe action.

Mother of the Gold - a powerful and lethal being that protects gold ores.

However, the area's mines for some years provided zinc, lead, copper, silver, and other gold ores.

He also mentions a mining method called fire-setting which was used to weaken and break down hard gold ores.

Mining with microbes is also under study, including the tapping of gold ores normally too dilute for recovery.

The milling of gold ores in California (1887)

Gold ores occur in fracture systems in the greenstone belts.

1938 Early investigations of refractory gold ores.

Gold miner, someone who mines gold or gold ores from the ground

The use of cyanide in the treatment of gold ores was debated in the European parliament in 2010.

Gold mining is the process of mining of gold or gold ores from the ground.

It is found with lead, silver and gold ores in Hungary, Bohemia and Saxony.

On the Metallurgical Treatment and Assaying of Gold Ores, 1852; 2nd edition, 1853.

The gold ores of Porcupine (Ontario): Engineering and Mining Journal v. 116, p. 633-638.

Refractory (mineral processing), metallic minerals that are difficult to liberate in traditional processes (i.e. refractory gold ores).

Mercur, one of the most important mining towns in Utah, did not fully exploit its gold ores until the 1890s when a cyanide processing plant was built there.

Bacterial oxidation (BIOX) is a biohydrometallurgical process developed for pre-cyanidation treatment of refractory gold ores or concentrates.

Nagyágite (PbAu(Te,Sb)S) is a rare sulfide mineral with known occurrence associated with gold ores.

The CPR also provided access the B.C. interior where lead, copper, silver and gold ores had been discovered in the Rossland area in 1891.

(Contributions to) The gold ores of Grass Valley, California (by E. Howe): Economic Geology, v. 19, p.595-622.

For his gold mining activities in Nevada and Colorado, Captain De Lamar, together with others, organized companies for starting barrel-chlorination of the telluride gold ores.

That mine employed a method known as cyanide heap-leaching, developed for extracting very low-grade gold ores requiring 50 tons of ores to yield one ounce of gold.

This process, called the "leach cycle," generally takes from one or two months for simple oxide ores (e.g., most gold ores) to two years (for nickel laterite ores).