Latitude: 32°6'50"N
Longitude: 110°4'4"W
‡Ref.: Cooper, J.R. (1950) Johnson Camp area, Cochise County, Arizona, in Arizona zinc and lead deposits, Part I: Arizona Bureau of Mines Bulletin No. 156.
Warner, L.A., Holser, W.T., Wilmarth, V.R., and Cameron, E.N. (1959) Occurrence of nonpegmatitic beryllium in the United States: U.S. Geological Survey Professional Paper 318, 198 p., 5 sheets, scales 1:480, 1:960, 1:4,800, 1:500,000: 97, 99, 101.
Cooper, J.R. & L.T. Silver (1964), Geology and ore deposits of the Dragoon quadrangle, Cochise County, Arizona, USGS PP 416: 170-171.
Roseboom, E.H., Jr. (1966), An investigation of the system Cu-S and some natural copper sulfides between 25º and 700º C., Economic Geology: 61: 641-672.
Livingston, D.E., Damon, P.E., Mauger, R.L., Bennett, R., and Laughlin, A.W. (1967) Argon 40 in cogenetic feldspar-mica mineral assemblages: Journal of Geophysical Research: 72(4): 1361-1375.
Keith, Stanton B. (1973), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 187, Index of Mining Properties in Cochise County, Arizona: 55 (Table 4).
Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, Arizona Department of Mines & Mineral Resources Open File Report 92-10: 4 (Table 1).
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 204.
MRDS database Dep. ID file #10103729, MRDS ID #M050009; and, Dep. ID #10282833, MAS I #0040030101.
A former small surface and underground Cu-Zn-Ag-Be mine located in the center of sec. 23, T.15S., R.22E. (Dragoon 7.5 minute topo map) on 8 claims, ¾ mile north of the town of Johnson. First produced 1901. Active 1901-1918, and in 1933. Owned in part or at times by the Black Prince Copper Co. and the Coronado Copper & Zinc Co.
Mineralization is a bedded replacement deposit of copper and zinc carbonates and sulfides with pyrite in mantos and pockety orebodies in weakly pyrometamorphosed Pennsylvanian-Horquilla Limestone containing tactite zones, and Black Prince Limestone. Ore control was replacement of favorable beds by ore solutions. Fluids also filled fissures. NE-trending faults localized the ore. Ore concentration was the replacement process and some oxidation and supergene enrichment. Alteration was garnetization. An associated rock unit is the Texas Canyon Quartz Monzonite (53 ± 3 MY).
This mine is located in highly faulted area. Most ore was confined to thin layers in Horquilla Limestone and along fault fissures. Bands of garnetite, which contain sulfide, occur in the limestone. The oxidized ore was mined out, but sulfide ores in the garnetite were not explored.
Local structures include a NE-trending fault system striking N15-20E; an east fault system, striking N70E to S70E, and dipping 45-80S. Tertiary block faulting trending NW. Regional trends include Late Cretaceous or Early Tertiary N- to NW-trending folds and thrust faults overriding to the NE.
Workings include underground and surface workings. Workings went to 304.8 meters deep. As of 1911, the depth of the main shaft, the "Keystone" was 937 feet. The old "incline shaft", 100 feet west of the main shaft, was sunk on secondary ore 153 feet on a 40 degree incline to the east. The "Alice", a vertical assessment shaft, is 50 feet deep and shows no mineralization. From the bottom of the old incline shaft and at intermediate points, drifts have been run, aggregating several hundred feet.
This group of mines produced a total of some 14,000 tons of ore intermittently from 1902 to 1918, which averaged 8.6% Cu and 5 Oz. Ag per ton.
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