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Connecticut Mine, Josephine Canyon, Tyndall District, Santa Rita Mts, Santa Cruz Co., Arizona, USA

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‡Ref.: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 189-190.

Rohrbacker, R.T. (1964) Geology of the Temporal Gulch-Mansfield Canyon area, Santa Cruz County, Arizona: Tucson, University of Arizona, M.S. thesis, 81 p.

Drewes, H.D. (1971) Geologic map of the Mount Wrightson quadrangle, southeast of Tucson, Santa Cruz and Pima Counties, Arizona: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-614, 1 sheet, scale 1:48,000.

Drewes, H.D., 1972, Structural geology of the Santa Rita Mountains, southeast of Tucson, Arizona: U.S. Geological Survey Professional Paper 748, 35 p., scale 1:12,000, 4 sheets.

Keith, Stanton B. (1975), Arizona Bureau of Mines Bull. 191, Index of Mining Properties in Santa Cruz County Arizona: 84 (Table 4).

U.S. Bureau of Mines - Arizona Bureau of Geology and Mineral Technology production file data.

U.S. Bureau of Mines file data-cluster #131, Connecticut Mine.

Arizona Bureau of Mines file data.

MRDS database Dep. ID file #10046331, MRDS ID #M241260; and, Dep. ID #10113210, MAS ID #0040230154.

A former small underground Cu-Pb-Zn-Ag-Au mine located on 12 claims, in the SE¼SW¼ sec. 25, T.20S., R.14E., adjoining the Rhode Island Mine, 3 miles SW of Mt. Wrightson (elevation 9453), in Josephine Canyon, 1/2 mile N of the mouth of Copper Canyon on National Forest land. Discovered by R.R. Richardson in 1895. Worked mainly in 1895-96, also 1913-1937. Owned at times, or in part, by McCutchen & Hogan (1912-1913); O.A. Reid (1936); R.R. Richardson (circa 1900-1915; 1930); Tate & Gartley of Tucson (September, 1914); and Parker & Reid (1931). Operated by Mr. Martin B. Wilson (1937).

Mineralization is partly oxidized spotty sulfides with iron oxides along a shear zone in crushed and silicified Laramide diorite. There is considerable zinc mineralization. An associated rock unit is the Josephine Canyon Diorite. Ore concentration was oxidation and epigenetic mineralization.

The fault or shear zone ledge, which dips steeply to the south, is in diorite and is 1.37 meters wide. In the principal ore-producing areas the vein is 4½ feet wide and consists of crushed and altered mineralized rock and quartz, contains ore, mostly in bands or stringers, interruptedly all the way across and for 90 or 100 feet along its course.

Also through the middle 2/3 of the drift extends a later 2 to 6 inch (5 to 15 cm) band or vein of ore which dips traversely to the NNE and is best exposed in the upper right wall and adjoining part of the roof. The ore in this vein contains sulfides, copper carbonate and iron oxides.

In the lower drift the ledge is composed mainly of closely sheeted, sheared, and partly altered diorite. Some slices are less than a ¼ inch thick, and along the sheeting planes are seams or stringers of oxidized ferruginous material. In the right rib of the drift is exposed about 2½ feet of altered iron and copper-stained rock and quartz containing some chalcopyrite and specular hematite. Toward the face of the drift, horizontal grooving indicates considerable lateral movement along shear zone.

Local structures include the SW end of the Gardner Canyon dike swarm. Veins in the region generally strike E-W and can be traced form only a few hundred feet. Tectonic elements include the Salero Fault Block.

Workings includes a 240 foot long adit drift 110 feet above the canyon bottom, a shaft and tunnel operations. A lower drift, 110 feet below the main drift is 80 feet long. Depth is 121.92 meters. Developed in the mid-1890's and produced intermittently through 1937. Produced some 240 tons of ore averaging about 11% Cu, 9% Pb, and 8 oz. Ag/T and minor gold.

Mineral List

7 entries listed. 5 valid minerals.

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