Dan Mine, Elgin Mine group, Peach-Elgin copper deposit, Helvetia-Rosemont District, Santa Rita Mts, Pima Co., Arizona, USA

Ref.: Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 125 (Table 4).

Arizona Bureau of Mines file data.

A Cu-Ag-Au mine group located in the NW ¼ sec. 23, T.18S., R.15E. Owned at times, or in part, by the Helvetia Copper Co.; Michigan-Arizona Development Co.; Helvetia Copper Co. of Arizona; Chilson; Elgin Mining Co.; Helvetia Mining Trust; and McFarland & Hullinger.

Mineralization is irregular, pyrometasomatic replacement lenses of copper carbonates and sulfides, controlled largely by faults, fractures, and favorable silicated Paleozoic limestone, in thrust-faulted and deformed blcoks.

Workings include shaft and tunnel operations.

Mineral List:

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