| Deposit ID | 10234825 |
|---|---|
| MRDS ID | M050530 |
| MAS/MILS ID | 0040190005 |
| Record type | Deposit |
| Current site name | Twin Buttes |
| Alternate or previous names | Copper Butte Mine |
| Point of reference | Ore Body |
|---|---|
| Geographic coordinates: | -111.05069, 31.90822 (WGS84) |
| Elevation | 1022 |
| Location accuracy | 1000(meters) |
| Relative position | 25 mi S of Tuscon, at Twin Buttes, 10 km SSE of the Mission Complex and 10 km ENE of the Sierrita and Esperanza mines. |
Political divisions (FIPS codes)
Pima(county)
Arizona(state)
United States(country)
North America(continent)
Land(continent)
USGS map quadrangles
Twin Buttes(quadrangle 1:24,000 scale)
Sells(quadrangle 1:100,000 scale)
Nogales(quadrangle 1:250,000 scale)
Hydrologic units (watersheds)
Upper Santa Cruz(hydrologic unit)
Santa Cruz(hydrologic accounting unit)
Middle Gila(hydrologic subregion)
Lower Colorado(hydrologic region)
| Country | State | County |
|---|---|---|
| United States | Arizona | Pima |
| Meridian | Township | Range | Section | Fraction | State |
|---|---|---|---|---|---|
| Gila and Salt River | 018 S | 013 E | 05 | SW | Arizona |
| Commodity | Importance |
|---|---|
| Copper | Primary |
| Copper Oxide | Primary |
| Copper Sulfide | Primary |
| Molybdenum | Secondary |
| Silver | Secondary |
| Gold | Secondary |
| Lead | Secondary |
| Zinc Critical | Tertiary |
| Uranium | Tertiary |
| Wollastonite | Tertiary |
| Materials | Type of material |
|---|---|
| Bornite | Ore |
| Brochantite | Ore |
| Chalcocite | Ore |
| Chalcopyrite | Ore |
| Chrysocolla | Ore |
| Cuprite | Ore |
| Galena | Ore |
| Malachite | Ore |
| Melaconite | Ore |
| Molybdenite | Ore |
| Powellite | Ore |
| Pyrite | Ore |
| Sphalerite | Ore |
| Tenorite | Ore |
| Wollastonite | Ore |
| Wulfenite | Ore |
| Actinolite | Gangue |
| Anhydrite | Gangue |
| Antigorite | Gangue |
| Biotite | Gangue |
| Calcite | Gangue |
| Epidote | Gangue |
| Fluorite | Gangue |
| Quartz | Gangue |
| Sericite | Gangue |
| Talc | Gangue |
| Magnetite | Unknown |
| Result | Sulfide Zone Averages 0.5% Cu. Diorite Porphyry Contains 0.4-0.6% Cu in Places. |
|---|
| Model code | 58 |
|---|---|
| USGS model code | 18a |
| Deposit model name | Porphyry Cu, skarn-related |
| Mark3 model number | 9 |
| Host or associated | Associated |
|---|---|
| Rock type | Plutonic Rock > Granitoid > Quartz Monzonite |
| Host or associated | Associated | ||
|---|---|---|---|
| Rock type | Plutonic Rock > Granitoid > Granite | ||
| |||
| Host or associated | Host |
|---|---|
| Rock type | Sedimentary Rock > Clastic Sedimentary Rock > Siltstone |
| Host or associated | Host | ||
|---|---|---|---|
| Rock type | Sedimentary Rock > Carbonate > Limestone | ||
| Rock unit name | Angelica Arkose; Concha Limestone | ||
| |||
| Ore Body (1) | -111.05069, 31.90822 |
|---|
| Type of structure | Local |
|---|---|
| Structure name | Sediments Folded & Contorted, Dip Steeply, Several Fault Systems |
| Type of structure | Local |
| Structure name | Stratigraphic Unconformities |
| Type of structure | Local |
| Structure name | NW Trending Fault Just North of Mine |
| Thickness | 300M | ||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Length | 2414M | ||||||||||||||||||||||||||||||||||
| Width | 1609M | ||||||||||||||||||||||||||||||||||
| Area | 1920HA | ||||||||||||||||||||||||||||||||||
| Depth to top | 140M | ||||||||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||||||||
| General form | Irregular |
|---|---|
| Depth to top | 121.92M |
| Depth to bottom | 243.84M |
| Operation type | Surface |
|---|---|
| Development status | Past Producer |
| Commodity type | Metallic |
| Deposit size | Large |
| Significant | Yes |
| Discovery year | 1870 |
| Mining method | Open Pit |
| Year of first production | 1969 |
| Year of last production | 1994 |
| Milling method | Flotation |
| District name | Twin Buttes |
|---|---|
| District name | Pima District |
| Type of mineral rights | Patented |
|---|---|
| Type of mineral rights | Located Claim |
| Ownership category | Private |
|---|
| Type | Lessee/Operator |
|---|---|
| Owner | Cyprus Amax Corp. |
| ID | 200136 |
| Interest | 100 |
| Home office | Arizona |
| Year | 1991 |
| First year | 1985 |
| Last year | 1999 |
| Type | Owner |
|---|---|
| Owner | Park Corp. |
| ID | 200136 |
| Interest | 100 |
| Home office | West Virginia |
| Year | 1991 |
| Type | Lessee/Operator |
|---|---|
| Owner | Banner Mining Company |
| Interest | 100 |
| First year | 1950 |
| Last year | 1973 |
| Type | Lessee/Operator |
|---|---|
| Owner | Anamax Company |
| Interest | 100 |
| First year | 1973 |
| Last year | 1985 |
| Type | Lessee/Operator |
|---|---|
| Owner | Phelps Dodge Corp |
| Interest | 100 |
| Year | 2009 |
| First year | 1999 |
| Last year | 2006 |
| Type | Lessee/Operator |
|---|---|
| Owner | Freeport-McMoran Copper and Gold |
| Interest | 100 |
| Home office | Arizona |
| Year | 2009 |
| First year | 2006 |
| Year | 1929 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Material | Ore | ||||||||||||||
| Accuracy | Estimate | ||||||||||||||
| |||||||||||||||
| Year | 1969 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Us Bumines Stats - Smelter Cu Output 21812000 Pounds Of Cu From Smelter | ||||||||||||||
| |||||||||||||||
| Year | 1970 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Us Burmines Stats - Smelter Cu Output 172061000 Pounds Of Cu From Smelter | ||||||||||||||
| |||||||||||||||
| Year | 1970 | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Material | Ore | |||||||||||||||||||||
| Accuracy | Accurate | |||||||||||||||||||||
| ||||||||||||||||||||||
| Year | 1971 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Us Bumines Stats - Smelter Cu Output 104208000 Pounds Of Cu From Smelter | ||||||||||||||
| |||||||||||||||
| Year | 1971 | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Material | Ore | |||||||||||||||||||||
| Accuracy | Accurate | |||||||||||||||||||||
| ||||||||||||||||||||||
| Year | 1972 | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Period | 1969-1972 | |||||||||||||||||||||
| Material | Ore | |||||||||||||||||||||
| Accuracy | Estimate | |||||||||||||||||||||
| ||||||||||||||||||||||
| Year | 1972 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Us Bumines Stats - Smelter Cu Output 154446000 Pounds Of Cu From Smelter | ||||||||||||||
| |||||||||||||||
| Year | 1973 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Us Bumines Stats - Smelter Cu Output 124451000 Pounds Of Cu From Smelter | ||||||||||||||
| |||||||||||||||
| Year | 1974 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Us Bumine Stats - Smelter Cu Output 88644000 Pounds Of Cu From Smelter | ||||||||||||||
| |||||||||||||||
| Year | 1975 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Us Bumines Stats - Smelter Cu Output 16617000 Pounds Of Cu From Smelter | ||||||||||||||
| |||||||||||||||
| Year | 1976 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Us Bumines Stats - Smelter Cu Output 128247000 Pounds Of Cu From Smelter | ||||||||||||||
| |||||||||||||||
| Year | 1976 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Pounds Cu Cathode/Twin Buttes Oxide Mill 57925000 Lbs Of Cathode Cu From Ox | ||||||||||||||
| |||||||||||||||
| Year | 1977 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Cu Cathode-Oxide Mill 68772000 Pounds Of Cathode Copper | ||||||||||||||
| |||||||||||||||
| Year | 1977 |
|---|---|
| Description | Sulfide Ore Treated 8387800 Short Tons |
| Year | 1978 |
|---|---|
| Description | Sulfide Ore Treated 6795600 Short Tons |
| Year | 1978 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Cu Cathode-Oxide Mill 71614000 Pounds Of Cathode Copper | ||||||||||||||
| |||||||||||||||
| Year | 1979 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Cu Cathode-Oxide Mill 70343000 Pounds Of Cathode Copper | ||||||||||||||
| |||||||||||||||
| Year | 1979 |
|---|---|
| Description | Sulfide Ore Treated Incl Palo Verde Feed 13911000 Short Tons |
| Year | 1980 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Cu Cathode-Oxide Mill 63719000 Pounds Of Cathode Copper | ||||||||||||||
| |||||||||||||||
| Year | 1980 |
|---|---|
| Description | Sulfide Ore Treated Incl Palo Verde Feed 4419699 Short Tons |
| Year | 1981 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Inc 252 Mt Mo From Palo Verde Ore 1004 Mtpy Mo Produced | ||||||||||||||
| |||||||||||||||
| Year | 1981 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Produced At Oxide Plant 30809 Mtpy Cu (Cathode) | ||||||||||||||
| |||||||||||||||
| Year | 1981 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Inc. 29,174 Mt Cu From Palo Verde Ore 91914 Mtpy Cu Recovered | ||||||||||||||
| |||||||||||||||
| Year | 1981 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Cu Oxide Ore Mined At Twin Buttes 3342000 Mtpy Cu Oxide Ore Mined | ||||||||||||||
| |||||||||||||||
| Year | 1981 |
|---|---|
| Description | Ore Milled At Twin Buttes (Includes 14513000 Mtpy Ore Milled |
| Year | 1981 |
|---|---|
| Description | Ore Mined At Twin Buttes 9926000 Mtpy Ore Mined |
| Year | 1982 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Inc. 324 Mt Mo From Palo Verde Ore 1876 Mtpy Mo Produced | ||||||||||||||
| |||||||||||||||
| Year | 1982 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Produced From Oxide Plant 25577 Mtpy Cu Cathode Produced | ||||||||||||||
| |||||||||||||||
| Year | 1982 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Inc. 24,691 Mt Cu From Palo Verde Ore 104228 Mtpy Cu Recovered | ||||||||||||||
| |||||||||||||||
| Year | 1982 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Cu Oxide Ore Mined At Twin Buttes 3338000 Mtpy Cu Oxide Ore Mined | ||||||||||||||
| |||||||||||||||
| Year | 1982 |
|---|---|
| Description | Inc. 4,248,000 Mt Palo Verde Ore 14789000 Mtpy Ore Milled |
| Year | 1982 |
|---|---|
| Description | Ore Mine At Twin Buttes 10540000 Mtpy Ore Mined |
| Year | 1983 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Inc. 15,831 Mt Cu Rec From Palo Verde 21576 Mtpy Cu Recovered | ||||||||||||||
| |||||||||||||||
| Year | 1983 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Inc. 149 Mt Mo From Palo Verde Ore 270 Mtpy Mo Produced | ||||||||||||||
| |||||||||||||||
| Year | 1983 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Cathode Cu Produced At Oxide Plant 22973 Mtpy Cu (Cathode) | ||||||||||||||
| |||||||||||||||
| Year | 1983 |
|---|---|
| Description | No Oxide Ore Mined No Oxide Ore Mined |
| Year | 1983 |
|---|---|
| Description | Includes 2,836,000 Mt From Palo Verde 6815000 Mtpy Ore Milled |
| Year | 1983 |
|---|---|
| Description | Ore Mined At Twin Buttes 661000 Mtpy Ore Mined |
| Year | 1984 |
|---|---|
| Description | Mo Byproduct Plant Closed No Mo Recovered |
| Year | 1984 |
|---|---|
| Description | Oxide Plant Closed For 1984 No Cathode Cu Produced |
| Year | 1984 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Only Cu Recovered From Stockpiled Ore 22788 Mtpy Cu Recovered | ||||||||||||||
| |||||||||||||||
| Year | 1984 |
|---|---|
| Description | Stockpile Ore (No Palo Verde Ore Milled) 3137000 Mtpy Ore Milled |
| Year | 1984 |
|---|---|
| Description | Twin Buttes Mine Closed In 1984 No Ore Mine At T B Or P V |
| Year | 1985 |
|---|---|
| Description | Mine, Sulfide & Oxide Plants Permanently Mine & Mills Closed 9/85 |
| Year | 1985 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Produced At Oxide Plant 8949 Mtpy Cu (Cathode) | ||||||||||||||
| |||||||||||||||
| Year | 1985 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Description | Mine Closed - Cu Oxide Stockpiled Ore 1355000 Mtpy Oxide Ore Milled | ||||||||||||||
| |||||||||||||||
| Year | 1988 |
|---|---|
| Description | Oxide Ore Treated 1124000 Mt Ore Mined |
| Year | 1989 |
|---|---|
| Description | Oxide Ore Treated 1103000 Mt Ore Mined |
| Year | 1989 |
|---|---|
| Description | Sulfide Ore Treated 2553000 Mt Ore Mined |
| Year | 1990 |
|---|---|
| Description | Oxide Ore Treated 753000 Mt Ore Mined |
| Year | 1990 |
|---|---|
| Description | Sulfide Ore Treated 5198000 Mt Ore Mined |
| Year | 1992 | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Period | 1969-1992 | |||||||||||||||||||||
| Material | 16,828 tonnes molybdenum; >392 tonnes U3O8 | |||||||||||||||||||||
| Ore mined | 183416000mt | |||||||||||||||||||||
| ||||||||||||||||||||||
| Type | In-situ | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Name | Mineralized material | ||||||||||||||||||||||||||||
| Estimate year | 2010 | ||||||||||||||||||||||||||||
| Demonstrated | 692000000mt ore | ||||||||||||||||||||||||||||
| Remarks | FCX 2010 10K, p. 39. | ||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||
| Type | In-situ | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Estimate year | 1973 | ||||||||||||||||||||||||||||
| Total resources | 202721000mt ore | ||||||||||||||||||||||||||||
| |||||||||||||||||||||||||||||
| Type | In-situ |
|---|---|
| Estimate year | 1992 |
| Reserves | 272000000mt ore |
| Remarks | Resource calculated by deducting 1969-92 production from 1968 reserves. |
| Type | In-situ | |||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Estimate year | 2008 | |||||||||||||||||||||||||||||||||||
| Total endowment | 940000000mt ore | |||||||||||||||||||||||||||||||||||
| Remarks | Singer, 2008. | |||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||
| Type | In-situ | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Estimate year | 1969 | |||||||||||||||||||||
| Total resources | 1133000mt ore | |||||||||||||||||||||
| ||||||||||||||||||||||
| Type of workings | Surface |
|---|---|
| Overall depth | 243.84M |
| Overall length | 1524M |
| Overall width | 1219.2M |
| Agency | Database name | Acronym | Record ID | Notes |
|---|---|---|---|---|
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0040190005 | |
| USGS | Mineral Resources Data System | MRDS | M050530 | MAS references MRDS |
| Mine Safety and Health Administration | MSHA | MSHA | 0200136 | |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0040190078 | DUP |
| Mine Safety and Health Administration | MSHA | MSHA | 0201565 | DUP |
| U.S. Bureau of Mines | Minerals Availability System | MAS | 0040190171 | DUP |
| USGS | Mineral Resources Data System | MRDS | M000091 | DUP |
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.
Cyprus/Amax 1972-92 SEC Form 10K; Anaconda 1971-75 SEC Form 10K; PCIA 1975-93
Emj 7/77 (Countercurrent Decantation-Oxide Plant)
Cimri
Sutulov, Alexander, Copper Porphyries, Univ. Of Utah Printing Services, 1974. (Mill)
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.
Singer and others, 2008
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.
World Mining, 11/76, P. 77.
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.
Cyprus Minerals Company Annual Report 1988 P. 2.
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.
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 8702
Cummings, 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.
| Subject category | Comment text |
|---|---|
| Deposit | Original Evaluation Was Done In 1978. Revised In 1980. Updated In 1983, In July 1987, And In 1991. |
| Deposit | Associated Minerals: actinolite, anhydrite/gypsum, apatite, apophyllite, azurite/malachite, biotite, bornite, brochantite, chalcocite/digenite, chalcopyrite, chlorite, chrysocolla, copper, cuprite/tenorite, Cu-Mn wad, diopside, epidote, ferrimolybdite, fluorite, galena, garnet, goethite/limonite, hematite/specularite, jarosite, magnetite, molybdenite, montmorillonite, powellite, pyrite, pyrolusite, pyrrhotite, rhodochrosite, rhodonite, rutile, scheelite, sericite, siderite, sphalerite, stibnite, tenorite, tetrahedrite, vanadinite, vesuvianite, wollastonite, wulfenite |
| Deposit | Associated Rocks: breccia, quartz monzonite porphyry, quartz-feldspar porphyry, skarn, andesite, anhydrite, conglomerate, dolomite, fanglomerate, granite, limestone, quartzite, rhyodacite porphyry, rhyolite, sandstone, shale, siltstone, tuff |
| Deposit | STRONGEST MINERALIZATION FOUND IN SILICATED, GARNETIZED, CHLORITIZED LIMESTONE & SILTSTONE; QUARTZITE ONLY WEAKLY MINERALIZED. CLASTICS ARE MINERALIZED ON S, AND BETTER CU VALUES OCCUR IN CONTACT WITH PORPHYRY TO THE SE. PORPHYRY SHOWS ONLY SCATTERED AND WEAK MINERALIZATION. SULFIDE ZONE 600-800 FT BELOW SURFACE. WOLLASTONITE OCCURS IN SKARN. |
| Deposit | Other Slightly Mineralized Garnetiferous Zones Eastward Along The Limestone - Granite Fault Contact. |
| Type | Date | Name | Affiliation | Comment |
|---|---|---|---|---|
| Updater | 20-AUG-09 | Anderson, Claire | U.S. Geological Survey | |
| Reporter | 26-AUG-94 | Hite, Alan G. | U.S. Bureau of Mines | |
| Updater | 01-NOV-92 | Orris, Greta J. | U.S. Geological Survey | |
| Reporter | 21-FEB-84 | Intermountain Field Operations Center (IFOC) | U.S. Bureau of Mines | |
| Reporter | 01-MAR-83 | Peterson, Jocelyn A. | U.S. Geological Survey | |
| Reporter | 04-NOV-83 | ADMR | U.S. Bureau of Mines | |
| Reporter | 01-NOV-79 | Johnson, Kris H. (Creasey, S.C.) | U.S. Geological Survey |
Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.
| Status | Abandoned since 07/03/1985 |
|---|---|
| MSHA mine ID | 0201565 |
| Mine name (MSHA) | Twin Buttes-#1 Adit |
| Current operator | Anamax Mining Company |
| Current controller (parent) | Amax Arizona Inc-Anaconda Arizona Inc |
| Mine type | Underground (Metal / non-metal) |
MSHA cross-reference per the original MRDS record. Mine status and operator reflect MSHA's last published Mines export (February 2025); MSHA's public bulk feed has been unavailable since, so this may be out of date. See the Mine Data Retrieval System for current status.
Open MSHA's Mine Data Retrieval System for inspections, accidents, and violations for this mine.
MRDS records operators as of each record's last update (≤ 2019). Some of the operators listed here have since changed hands or dissolved:
Curated by qvyshift.com from publicly-reported M&A activity (SEC filings, press releases, USGS Mineral Yearbooks). Not authoritative — verify against primary sources before relying on it. The MSHA panel above is the current authoritative source for actively-permitted mines.
These are landing pages for further research — the state agencies don't currently expose per-mine deep links.