Arizona · Pima County
Past Producer

Twin Buttes

Pima County, Arizona, United States
Copper SulfideCopper OxideLeadSilverMolybdenumGoldUraniumZincWollastonite
⌖ Show on mapUSGS source ↗
Commodities
PrimaryCopper Sulfide, Copper Oxide
SecondaryLead, Silver, Molybdenum, Gold
TertiaryUranium, Zinc, Wollastonite
Commodity typeM
Deposit
Deposit typePorphyry Cu, Skarn Related
Model58: Porphyry Cu, skarn-related
WorkingsSurface
Orebody formIrregular
Materials
Ore mineralsBornite, Brochantite, Chalcocite, Chalcopyrite, Chrysocolla, Cuprite, Galena, Malachite, Melaconite, Molybdenite, Powellite, Pyrite, Sphalerite, Tenorite, Wollastonite, Wulfenite
GangueActinolite, Anhydrite, Antigorite, Biotite, Calcite, Epidote, Fluorite, Quartz, Sericite, Talc
Other materialsMagnetite
Geology
Host rockSiltstone,Limestone · Angelica Arkose; Concha Limestone
Associated rockQuartz Monzonite,Granite
Economic & production
Development statusPast Producer
First production1969
Last production1994
Discovery year1870
Identification
Deposit ID10234825
MRDS IDM050530
Alternate namesCopper Butte Mine
RegionNA
Data scoreA
Coordinates31.90822, -111.05069
References
Singer and others, 2008Cyprus Minerals Company Annual Report 1988 P. 2.Mining Magazine. July 1991. Moly And More From Sierrita.Skillings Mining Review 6/4/77,P.12-16, Anamax Mining Co.'S Copper Operations At Twin Buttes Mine (Oxide Plant, Mining Equipment, Exploration)World Mining 5/77, P.96-99 (Reserves, Mining Rate, Recovery Production Stats.)Pay Dirt 4/25/77, P.57 (Drying Concentrate, Exploration)Hopkins,W.R., and Lynch,A.J., Anamax Oxide Plant: A New U.S. Dimension. E/Mj, 2/77, P.56.Energy Use Patterns In Metalurgical And Nonmetallic Mineral Processing: U.S. Dept. Of Commerce P.B. 245-759.Skillings Mining Review, 5/24/80, P. 7.Brooke, James N. Uranium Recovery From Copper Leaching Operations In Mining Congress Journal, 8/77, P. 38-41.Isolated Processing Of Twin Buttes Ore In The Cyprus Sierrita Mill. Aime Annual Meeting. Arizona Section. December 5, 1989.Peirce, H.W., 1990, Arizona Geological Survey Industrial Mineral Card Files.Keith, S. B., 1974 , Index Of Mining Properties In Pima County, Arizona: Arizona Bureau Of Mines Bulletin, 189 , P. 133 .Lorraine, 1976, USBM Ic 8702Cummings, J. B., And Romslo, T. M., 1950 , Investigation Of The Twin Buttes Copper Mines, Pima Co, Ariz: USBM R. I. 4732 .Cooper, J. R., Some Geologic Features Of The Pima Mining District, Pima County, Arizona: USGS Bulletin 1112 - C.Barter, C. F., 1978, Stratigraphy, alteration, and ore controls in the main ore zone, Twin Buttes mine, Pima County, Arizona: Arizona Geological Society Digest, v. 11, p. 115?116.Barter, C.F., and Kelly, J.L., 1982, Geology of the Twin Buttes mineral deposit, in Titley, S.R., ed., Advances in geology of the porphyry copper deposits, southwestern North America: Tucson, University of Arizona Press, p. 407?432.Einaudi, M.T., 1982, Description of skarns associated with porphyry copper plutons, in Titley, S.R., ed., Advances in geology of the porphyry copper deposits, southwestern North America: Tucson, University of Arizona Press, p. 139-183.Kelley, J.L., 1976, Geology of the Twin Buttes copper deposit, Pima county, Arizona: AIME Annual Meeting, February 22?26, 1976, Las Vegas, Preprint No. 76?1?3, 23 p.Titley, S.R., 1982, Some features of tectonic history and ore genesis in the Pima mining district, in Titley, S.R., ed., Advances in geology of the porphyry copper deposits, southwestern North America: Tucson, University of Arizona Press, p. 387?406.CimriEmj 7/77 (Countercurrent Decantation-Oxide Plant)Sutulov, Alexander, Copper Porphyries, Univ. Of Utah Printing Services, 1974. (Mill)World Mining, 11/76, P. 77.Cyprus/Amax 1972-92 SEC Form 10K; Anaconda 1971-75 SEC Form 10K; PCIA 1975-93