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Golden Sunlight is a conventional open-pit mine with a co-located ore treatment plant using carbon-in-pulp technology as well as sand tailings retreatment, where pyrite is gravity-separated from the cyclone underflow fraction, and reground and leached to recover gold that would otherwise be lost to tailings.
This list of gold mines in the United States is subsidiary to the list of mines article and lists working, defunct and future mines in the country and is organised by the primary mineral output.
Current active hardrock gold mines include the Montana Tunnels mine, and the Golden Sunlight mine. Active gold placers include the Browns Gulch placer and the Confederate Gulch placer. Gold is also produced from three platinum mines in the Stillwater igneous complex: the Stillwater mine, the Lodestar mine, and the East Boulder Project. [34]
Mineral deposits associated with the Elkhorn Mountains Volcanics include those mined at Elkhorn, Montana, now a ghost town, and gold at the Golden Sunlight Mine near Whitehall, which is associated with a breccia pipe in the volcanics. The mountain range seen today is related to regional structural uplift dating mostly to Oligocene time.
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