Leadville ore district

The Leadville mining district, located in the Colorado Mineral Belt, was the most productive silver-mining district in the state of Colorado and hosts one of the largest lead-zinc-silver deposits in the world. Oro City, an early Colorado gold placer mining town located about a mile east of Leadville in California Gulch, was the location to one of the richest placer gold strikes in Colorado, with estimated gold production of 120,000–150,000 ozt (8, 200–10, 300 lb, 3, 700–4, 700 kg), worth $2.5 to $3 million at the then-price of $20.67 per troy ounce. Cumulative production through 1963 was 240 million troy ounces (16 million pounds, 7.5 million kilograms) of silver, three million troy ounces (210 thousand pounds, 93 thousand kilograms) of gold, 987 million tonnes (2.2 trillion pounds, 987 billion kilograms) of lead, 712 million tonnes (1.6 trillion pounds, 712 billion kilograms) of zinc, and 48 million tonnes (110 billion pounds, 48 billion kilograms) of copper. The district also produced byproduct bismuth, and iron-manganese ore.

Mine data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).