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Republic Mine (Republic Copper Co. property), Johnson Camp, Cochise District, Little Dragoon Mts, Cochise Co., Arizona, USA

Latitude: 32°6'4"N
Longitude: 110°3'53"W
‡Ref.: Kellogg, L.O. (1906), Sketch of the geology and ore deposits of the Cochise mining district, Cochise County, Arizona, Economic Geology: 1: 651-659.

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: 30-39.

Cooper, J.R. & L.C. Huff (1951), Geological investigations and geochemical prospecting experiment at Johnson, Arizona. Economic Geology: 46: 731-756.

Baker, Arthur, III (1953b) Localization of pyrometasomatic ore deposits at Johnson Camp, Arizona: American Institute of Mining and Metallurgical Engineers, Transactions: 196: 1272-1277.

Cooper, J.R. (1957), Metamorphism and volume losses in carbonate rocks near Johnson Camp, Cochise County, Arizona, Geological Society of America Bull.: 68: 577-610.

Warner, L.A., et al (1959), Occurrence of non-pegmatite beryllium in the United States, USGS PP 318: 97, 99, 101.

Baker, A., III (1960), Chalcopyrite blebs in sphalerite at Johnson Camp, Arizona, Economic Geology: 55: 387-398.

Cooper, J.R. (1962) Bismuth in the United States, exclusive of Alaska and Hawaii: U.S. Geological Survey Mineral Investigations Resource Map MR-22, 19 p., 1 sheet, scale 1:3,168,000.

Lemmon, D.M., and Tweto, O.L. (1962) Tungsten in the U.S., USGS map, MR-25.

Cooper, J.R. & L.T. Silver (1964), Geology and ore deposits of the Dragoon quadrangle, Cochise County, Arizona, USGS PP 416: 165-168.

Keith, Stanton B. (1973), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 187, Index of Mining Properties in Cochise County, Arizona: 59 (Table 4).

Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 185, 204, 392, 432.

MRDS database Dep. ID file #10103755, MRDS ID #M050513; and, Dep. ID #10135362, MAS ID #0040030203.

A former small underground Cu-Zn-Ag-W-Pb-Au-Mo-Bi-Be mine located in East-central sec. 26, T.15S., R.22E, 5.5 miles NNW of Dragoon; on SE edge of the town of Johnson, 2 miles NE of the Primrose Mine, on private land. Produced 1882-1952. Owned in part, or at times, by the Black Prince Copper Co., Arizona Consolidated Mining Co., Arizona United Mining Co., Arizona United Development Co., and the Coronado Copper & Zinc Co.

Mineralization is sulfides in pyrometasomatic mantos and chimneys in garnetized, silicated and marmolized, faulted and fissured Cambrian Middle Member Abrigo Limestone. Ore control was faults cutting favorable beds, axes of shallow anticlines. The ore zone is 457.2 meters long, 121.92 meters wide, 91.44 meters depth to top, 274.32 meters depth to bottom, 12.19 meters thick, striking N50W, dipping 40NE, with a plunge of S600-85E 1-25. Assay data: 4-4.5% Cu, 0.5-0.75% oz/t Ag, unknown % Zn (pre-1940); 1.5-3% Cu, 5-10% Zn, 0.3 oz/t Ag to 0.1% W (post-1940).

Another ore body was 800 by 200-400 by 15-40 feet, perpendicular to bedding, localized along the axis of shallow anticline trending N10W. The clearest association of ore with a fold is where the main manto ore body lies along an anticlinal flexure between the 700 and 1300 levels. The main manto fold dies out a short distance above the 700 level but the ore body continues with the same trend almost to the surface.

Workings include extensive shaft workings. Workings total 6,4000 meters in length and 121.92 meters deep. The workings are comprised of drifts, crosscuts, stopes, winzes, and extensive shaft workings. A total of at least 600,000 tons of ore was produced from the early 1880's to recent times.

Other ore in minable grade was discovered but construction costs were prohibitive. Favorable beds on the hanging wall side of the Republic Fault have been thoroughly explored.

Mineral List

Bornite
Calcite
Chalcopyrite
'Chlorite Group'
Copper
Diopside
Galena
'Garnet'
Magnetite
Molybdenite
Orthoclase
Pyrite
Scheelite
Sphalerite
Tetrahedrite
Zoisite
var: Thulite


17 entries listed. 14 valid minerals.

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Copyright © Jolyon Ralph and Ida Chau 1993-2011. Jobs in Arizona, USA Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 17th Jun 2011 11:38:07
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