watts and franklin placer mining equipment

gold mines and prospects in Xinhaiia - Xinhaiia Department of Mines ...

Aug 17, 1971 ... not opened again until 1934, when drilling was done to determine the value of the gold ore. Sev- eral samples from the mine were reportedly as- sayed at 0.15-0.2 ounces of gold Per ton. The OPer-. Figure 6. Gold recovery equipment utilized at the ation closed again in late 1935. In the 1950's and. Franklin...

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Mining Collection Dates - National Museum of American History

Coloradan gold); brochures advertising mining, milling, and smelting equipment, or promoting chemical processing ... Series 2, Mining Equipment and Processing Companies, circa 1852-1964; undated, contains material from companies and .... Bullfrog and Goldfield, Nevada. 62 Franklin Silver Mining Company, 1871.

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Macon Industries Inc. | Placer Mining Equipment and Wash Plants

Macon Industries manufacture a complete line of wash plants, placer mining equipment and ground production machinery for every scenario.

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Placer mining - Wikipedia

Placer mining is the mining of stream bed (alluvial) deposits for minerals. This may be done by open-pit or by various surface excavating equipment or tunnelling equipment. Placer mining is frequently used for precious metal deposits (particularly gold) and gemstones, both of which are often found in alluvial...

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