Pima County Arizona
Pima County ranks seventh among Arizona's gold-producing counties.
Ajo was a major copper center with an enormous open pit mine, which produced 990,000 ounces of by-product gold from 1924-59. The New Cornelia Mine was an open pit, spectacular. If you go south 30 miles via a branch from old Sonoita road and about 6 miles west of Dripping Springs in the Puerto Blanco mountains, you will find the Golden Bell Mine.
Arivaca is located in the area of the Las Guijas mountains. The Las Guijas placers are very productive; they are situated along Arivaca Creek, in the large channel along the southwest slope of mountains, and along Las Guijas Creek, along the northeast slope, much smaller and drier, placers worked intermittently to the present day. In addition, you will find placers in regional pediment slopes, mesas, and watercourse beds, mostly drywash types. In pediment at the north foot of mountains, from pediment itself, and the area arroyos and gulches, there were large scale placers operated in 1933.
There are numerous dry wash placers west of Continental by 6 miles along the upper course of Amargosa Arroyo. In all tributaries, watercourse beds and banks, dry placers. If you look in sections. 20, 21, 28, and 29, of township 18 south and range 12 east, in thin soil and hillside residues, there is placer gold associated with magnetic sand.
South of Covered Wells by 6 miles, you will find the Morgan Mine, which produced lode gold.
The Greaterville district, 34 miles southeast of Tucson, produced 4,140 ounces from 1903 to 1959. Located in an area of about 8 square miles on the lower slope of the Santa Rita mountains, all watercourses, benches, etc., contain placer gold. The productive gulches of Boston, Kentucky, Harshaw, Sucker, Graham, Louisiana, Hughes, and Ophir (below its junction with Hughes Gulch) are very placer gold producers. In the upper parts of Los Pozos and Colorado gulches, Chisapa Gulch, on the road from town to Enzenberg camp, and Empire Gulch (below its junction. with Chispa Gulch), there is abundant placer gold. In Hughes Gulch, area lead-silver mines produced lode gold.
In Quijotoa, a Pima village about 70 miles west of Tucson north on Rte. 86, in the area of the Quijotoa mountains,15 miles long by 5 miles wide, encompassing approximately 100 square miles, you will find the Quijotoa placers. Many regional unmined and poorly prospected quartz outcrops and hematitic brecciated zones produce lode gold, and some exposures have provided spectacular specimens. Suppose you go 3 miles south of Pozo Blanco and 1 mile west of the foot of the Quijotoa mountains, several area placer diggings, with rich coarse gold. If you go 6 miles north of the mountains, an area of several ghost mining camps from the 1880s boom, there were numerous placer operations.
Southwest of Redington, on the north slope of Alder Canyon in the Santa Catalina mountains, from near USFS south boundary to within a few miles of the San Pedro River, some placers produce coarse, flat, ragged gold.
South of Robles, located 25 miles west of Tucson north on route 86, if you go southwest, in the Baboquivari mountains, you will find the Gold Bullion Mine lode mine. If you go 5-6 miles southeast of Baboquivari Peak, at the east foot of mountains, in benches and bars along a large eastward trending wash, you will find the Baboquivari placers.
In Sells, located in the South Comobabi mountains on the Papago Indian Reservation, at the south base of the hills and 4 miles west of Hwy. 86, the Akron Mine consisted of 20 claims and was a large lode gold producer. If you go northwest 1.5 miles from the mine, the Corona Group produced minor lode gold deposits. In other areas, mines include the Hawkview, Faro Bank Group (4 miles north of town), and minor prospects for lode gold. Southeast 21 miles, on the west side of the Baboquivari mountains, the Allison (Chance) Mine was a major district producer from 1898 to the mid-1930s for lode gold.
Southwest of Tucson 30 miles, at Papago, along Ash Creek, the Sunshine-Sunrise Group of claims in Pescola Canyon had some rich placers. If you go south by southeast, 30 miles, at the northwest base of the Santa Rita mountains, in Madera Canyon, the Old Baldy placers, which were richest below the road forks in deposits trenched 40-50 feet, rather extensively worked.