Moore Mine, Johnson Camp, Gunnison Copper Project, Cochise Mining District, Cochise County, Arizona, USAi

Regional Level Types
Moore Mine	Mine
Johnson Camp	Village (Abolished)
Gunnison Copper Project	Project (Active)
Cochise Mining District	Mining District
Cochise County	County
Arizona	State
USA	Country

A former small underground Cu-Zn-Ag-Au-W-Mo-Pb (Bi) mine located in the SW ¼ sec. 23, T.15S., R.22E. (Dragoon 7.5 minute topo map), ¾ mile NW of the town of Johnson; 1.8 km SE of Johnson Peak and 1,000 feet E of the Mammoth Mine, on private land. Discovered 1947. Produced 1951. Owned at times, or in part, by the Coronado Copper & Zinc Co., Strong & Harris; McFarland & Hullinger, and the Stauffer Mining Co.

Mineralization is a replacement deposit of copper carbonates, sulfides and tungsten mineralization in pyrometasomatic replacement mantos and chimneys controlled by faults, fissures, and axes of shallow folds in Cambrian Abrigo and Devonian Martin limestone beds. An associated rock unit is the Texas Canyon Quartz Monzonite. Alteration included recrystallization, garnetization, tactite formation and minor oxidation.
Assay: ^2.5% Cu, 6.5% Zn (1951-1969 cumulative). The ore zone is 182.88 meters long, 53.34 meters wide, depth to top of 114.3 meters, depth to bottom of 160.02 meters, 21.34 meters thick, striking NW and dipping 20-40NE, and with a plunge of N10W. There is some hypogene enrichment in an area of complex block faulting. Ore boundaries are plane surfaces parallel to beds. Long axes of ore bodies were controlled by fault fissures or folds.

Ore in white tactite had Cu:Zn = 1:1. Ore contained several percent of each metal. Early ores contained up to 20% Cu with very little Zn.
Chimneysare 50 to 175 feet wide parallel to bedding, and 30 to 60 feet thick, perpendicular to the beds. There were 4 major ore bodies.

Local structures include NNW-trending Tertiary block faulting, with thrust faults overriding to the NE. Flexures related to N-trending folds, drag on faults, changes in dip of the beds, and complex block faulting.

Workings include extensive shaft workings to a depth of 243.84 meters. Connected later with the Mammoth Mine workings. The shaft connects to the Mammoth workings. Extensive workings exist on the 400, 500, & 600 levels. Large 'A' ore body of the Moore Mine is situated about 1000 feet E of the Mammoth Mine. A total of more than 500,000 tons of ore were produced from 1951 through 1969. Shut down in 1957 because of a fall in metal prices.

The Moore Mine was the only active mine in the Johnson Camp area from 1952-1957. Favorable exploration targets exist in offset faults. Problems exist in determining the sequence of the faults.

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Link to USGS MRDS:	10039388

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References