Copperosity Mine (Riesner property; Houston-Arizona Copper Co. property), Cathedral Rock area, Copperosity Hills, Tohono O'odham Indian Reservation, Pinal Co., Arizona, USA
A former surface and underground Cu-Ag-Zn-Pb-Au-Mo mine located in the E½ sec. 14, T10S, R2E (Vekol Mountains 15 minute topo map), about 2¾ miles ENE of Cathedral Rock. NOTE: Coordinates approximate as interpolated from a map. Discovered 1885. Produced 1890-1917. Claims include the Copperosit Copperosity No. 1 through No. 5, Copperosity Extension, Copperosity Annex and Copperosity Extension No. 5 and No. 6 (MS. 3556). Previous owners and operators include E.J. Bonsall (1890-1906); Copperosity Mining Co. (1907, 1916-17); J.P. Wagnon; Houston-Arizona Copper Co. (1922); and the Chamberlain Co. (1980'S).
Mineralization includes lens-shaped ore bodies hosted in the Abrigo formation limestone as replacement in the limestone along fault zones. Ore control was NE and NW-trending faults. The limestone beds dips 30-50NW. Quartz monzonite dikes are present. Oxidation is strong.
Regional sructures description NE and NW Trending Faults, limestone beds dipping 30-50NW, quartz monzonite dikes. Cretaceous to Tertiary granite occurs ½ mile west of the mine in the Kohakt Valley; granitic dikes reported in ADMR file.
Workings include a two compartment shaft (No. 1) (385 feet deep) with levels at 200 and 300 feet; No. 2 shaft, B shaft and various small prospecting shafts.
ReferencesTenny, J.B. (1927-1929) History of Mining in Arizona: 337.
Tenney, J.B. (1934) Economic Geological Reconnaissance of Casa Grande Mining District. Arizona Bureau of Mines: 13-14.
Eising and Heineman (1936) Arizona Bureau of Mines Bulletin 140: 99.
Bureau of Land Management District Sheet 543.
Arizona Bureau of Geology and Mining Technology - U.S. Bureau of Mines file data.
Heindl, L.A. (1965), Mesozoic formations in the Vekol Mountains, Papago Indian Reservation, Arizona, USGS Bull. 1194-G: G2 (Figure 1).
Niemuth, N.J. & K.A. Phillips (1992), Copper Oxide Resources, Arizona Department of Mines & Mineral Resources Open File Report 92-10: 14 (Table 1).
USGS Vekol Mountains Quadrangle map.
Arizona Department of Mineral Resources Copperosity file.
Arizona Department of Mineral Resources U file.
MRDS database Dep. ID #10046278, MRDS ID #M241170; and Dep. ID #10210871, MAS ID #0040210267.
6 entries listed. 5 valid minerals.
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
This page is currently not sponsored. To sponsor this page click here.
|Fade toolbar when not in focus||Fix toolbar to bottom of page|
|Hide Social Media Links|
|Slideshow frame delay||seconds|