‡Ref.: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 237.
USGS Mt Wrightson 7.5 minute topo map.
U.S. Bureau of Mines field notes, AU19.
MRDS database Dep. ID file #10210534, MAS ID #0040230406.
A former underground Au-Cu-Ag mine/group of claims located about 1 mile SSW of Josephine Peak and 1½ miles west of the Walker Mine, in the head of Temporal Gulch, at an elevation of about 6,500 feet. The camp is located just east of the crest of the range. Discovered in 1880 and was relocated in 1907 by F.B. Sayer, R.T. Stump, and others, owners (circa 1907-1915).
The country rock is coarse-grained diorite, some of which is nearly black, representing a very basic segregation, and apparently stands near anorthosite.
The deposits occur principally in a rhyolite dike or ledge 200 feet wide which cuts the diorite. In the lower tunnel, where it makes the best showing, the dike contains numerous east-west seams, stringers, or parallel veins, the largest about 1 inch (2.5 cm) wide, which are composed of massive crystalline pyrite with some chalcopyrite. The ledge extends for ½ mile east of the prospect and for a considerable distance to the west across the divide into Josephine Canyon. Some sulphur and alum are leached out on its surface, and the diorite on the north contains a small deposit of specularite.
Workings include 2 tunnels, each about 200 feet long, spaced about 130 feet apart vertically and 1,000 feet horizontally.
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Map Reference: 31°39'54"N , 110°50'36"W
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