A former underground Cu-Ag-Mn mine located in the NW¼SW¼ sec. 24, T1N, R14E, about 800 feet NW of the Inspiration Co's. main shaft, on private land. Produced 1896-1919. Inspiration Copper bought all holdings in 1920. Black Warrior Copper Co. operated it until 1909, then Warrior Copper Co.
Mineralization is a tabular ore body 3.66 meters wide hosted in the Pinal Schist. Ore control was along the fault, mainly in dacite breccia east of the fault. The orebody was along a fault that strikes north and dips 35E, apparently at its intersection with an eastward-striking fault in the footwall. The latter fault is approximately on the westward projection of the Warrior fault zone, but it dips in the opposite direction, and the depressed block is on the north side, whereas the Warrior fault depresses the block on the south side. Mineralization was associated with Early Tertiary Schultze Granite intrusive period.
Dacite forms the hanging wall in the mine workings, on the east side of the northward-striking fault and schist the footwall. The throw is about 400 feet. A short distance south of the mine, the fault splits; the east branch probably is the Pinto fault, and the west branch may be the northward continuation of the Bulldog fault. Both the Pinto and Bulldog faults displace the Miami-Inspiration orebody and could have served as channels for copper-bearing, supergene solutions.
According to Ransome (1903, pp. 156-158), the orebody was as much as 12 feet thick. It consisted of fragile, brittle chrysocolla, commonly so darkly colored by manganese oxides as to resemble bituminous coal, that probably replaced dacite breccia and the tuffaceous material dragged from the tuffaceous conglomerate underlying the dacite sheet. The ore is black due to Mn oxides.
Workings include a 250 foot deep shaft with three levels. The main level is the second, 80 feet deep. No commercial ore below the 80 foot level. Production data were included under the Warrior Mine past 1904 in ABGMT-USBM files.
References:
Ransome, F.L. (1903) Geology of the Globe Copper District, Arizona, USGS PP 12: 156-157.
Peterson, N.P. (1962), Geology and ore deposits of the Globe-Miami District, Arizona, USGS PP 342: 80, 135-137, Plate 1.
U.S. Bureau of Mines - Arizona Bureau of Geology and Mining Technology file data.
MRDS database Dep. ID #10046326, MRDS ID #M241237.
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Map Reference: 33°24'44"N , 110°53'35"W
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Mineral List:1 entry listed. 1 valid mineral.
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