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Western Mining History

Western Mining History

The Western Mining History Gold Explorer is an interactive map designed to assist in the location of both historic and modern gold districts in the Western United States. Last updated: November 13, 2019 – added mining town and gold district data layers, added buttons to activate and deactivate data layers.

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 PHASES OF A MINING PROJECT

PHASES OF A MINING PROJECT

Placer mining is used when the metal of interest is associated with sediment in a stream bed or floodplain. Bulldozers, dredges, or hydraulic jets of water (a process called 'hydraulic mining') are used to extract the ore. Placer mining is usually aimed at removing gold from stream sediments and floodplains.

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Monazite: A rareearth phosphate mineral.

Monazite: A rareearth phosphate mineral.

All monazite mining is focused on placer deposits because they are easier to mine and the monazite is often present in higher concentrations than in hard rock deposits. Other heavy minerals that accumulate with monazite include gold, platinum, magnetite, ilmenite, rutile, zircon, and a variety of gemstones. The heavy sands recovered are processed to separate these heavy minerals, and the light fraction is .

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Gold Findings

Gold Findings

Gold Findings The following map will show you the approximate "Gold Locations" found in the state of PA. The locations are approximate in nature to give you a starting point or reference as to its location.

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