Cerro Colorado Mountains
Encyclopedia
Pima County, Arizona
-2010:Whereas according to the 2010 U.S. Census Bureau:*74.3% White*3.5% Black*3.3% Native American*2.6% Asian*0.2% Native Hawaiian or Pacific Islander*3.7% Two or more races*12.4% Other races*34.6% Hispanic or Latino -2000:...
, USA. The highest point of the range is at the Colorado Benchmark (5319 feet (1,621.2 m)), at 31.712041°N 111.262048°W.
The Cerro Colorado Mine (Heintzelman Mine; Silver Queen Mine) was discovered around 1750 by Spanish explorers. The mine was in production from 1856 to 1884 and from 1901 to 1937. Early production was by the Sonora Exploration & Mining Company, which was then owned by Charles Poston and Samuel Colt
Samuel Colt
Samuel Colt was an American inventor and industrialist. He was the founder of Colt's Patent Fire-Arms Manufacturing Company , and is widely credited with popularizing the revolver. Colt's innovative contributions to the weapons industry have been described by arms historian James E...
. Production was some 3,000 tons of ore averaging about 100 oz. Ag/Ton, 0.1 oz. Au/Ton and minor amounts of Pb & Cu.
The richest ore on record ran over 12,000 oz. Ag per ton. The average ore mined in 1859 was 770 oz/t; the average of all ore mined since then has been about 225 oz/t. No significant quantities of ore were found below 350 feet.