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Tohono

Producer in Pinal county in Arizona, United States with commodities Copper, Copper Oxide, Copper Sulfide, Molybdenum, Gold, Silica, Silver, Lead, Zinc
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Geologic structures
  13. Ore body information
  14. Controls for ore emplacement
  15. Economic information about the deposit and operations
  16. Mining district
  17. Mineral rights holdings
  18. Ownership information
  19. Production statistics
  20. Reserves and resources
  21. Workings at the site
  22. Links to other databases
  23. Bibliographic references
  24. General comments
  25. Reporter information

Geologic information

Identification information

Deposit ID 10162257
MRDS ID D000752
MAS/MILS ID 0040210004
Record type Deposit
Current site name Tohono
Alternate or previous names Cyprus Tohono, Lakeshore, Cyprus Casa Grande, Casa Grande, Treasure State, Trans Arizona Res. Inc

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -111.90071, 32.5168 (WGS84)
Elevation 579
Location accuracy 1000(meters)

Site location context

Political divisions (FIPS codes)

Pinal(county)

Arizona(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

North Komelik(quadrangle 1:24,000 scale)

Casa Grande(quadrangle 1:100,000 scale)

Tucson(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Santa Rosa Wash(hydrologic unit)

Santa Cruz(hydrologic accounting unit)

Middle Gila(hydrologic subregion)

Lower Colorado(hydrologic region)

Geographic areas

Country State County
United States Arizona Pinal

Public Land Survey System information

Meridian Township Range Section Fraction State
Gila and Salt River 010 S 004 E 36 Arizona

Commodities

Commodity Importance
Copper Primary
Copper Oxide Primary
Copper Sulfide Primary
Molybdenum Secondary
Gold Tertiary
Silica Tertiary
Silver Tertiary
Lead Tertiary
Zinc Critical Tertiary

Materials information

Materials Type of material
Bornite Ore
Bornite Ore
Brochantite Ore
Chalcocite Ore
Chalcopyrite Ore
Chrysocolla Ore
Covellite Ore
Cuprite Ore
Diopside Ore
Galena Ore
Garnet Ore
Goethite Ore
Molybdenite Ore
Pyrite Ore
Sphalerite Ore
Tenorite Ore
Tremolite Ore
Calcite Gangue
Chlorite Gangue
Hematite Gangue
Magnetite Gangue
Quartz Gangue

Alteration

  • (Local) Oxidation; Potassic, Phyllic, Argillic, Sericitization, & Propyllitic zones

Analytical data

Result 0.76% Cu in Sulfide Ore, 1.03% Cu in Oxide Ore (1976)

Mineral occurrence model information

Model code 58
USGS model code 18a
Deposit model name Porphyry Cu, skarn-related
Mark3 model number 9

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Quartz Monzonite
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock type qualifier Host for skarn mineralization
    Rock unit name Mescal Limestone of the Apache group
    Stratigraphic age (youngest) Tertiary

Nearby scientific data

Ore Body (1) -111.90071, 32.5168
ListMap

Economic information

Geologic structures

Type of structure Local
Structure name Lakeshore Fault (Nnw, Dip 50-80W)-Post Ore Stock Fault Down to W

Ore body information

  • Strike S11W
    Dip 20W
    Thickness 330M
    Length 1830M
    Width 760M
    Area 400HA
    Depth to top 150M
    Field Value
    Type of Orebody #1 STOCKWORK
    Shape of Orebody #1 MASSIVE
    Type of Orebody #2 DISSEMINATED
    Primary mode of Origin CONT METASOMATIC
    Primary Ore Control IGNEOUS
    Secondary Ore Control LITHOLOGY
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 SERICITIC
    Strike And Dip S11W:20W
    Minimum Depth to Top 61
    Min. Thick. Unconsol. Mat. 5
    Total Surface Area (HA) 400
    Date of Last Modification 830726
  • General form Pipe, Irregular
    Plunge 20 DEG W
    Thickness 914.4M
    Length 1219.2M
    Width 914.4M
    Depth to top 0M
    Depth to bottom 914.4M

Controls for ore emplacement

  • Faulting and Stratigraphic Control

Economic information about the deposit and operations

Operation type Underground
Development status Producer
Commodity type Metallic
Deposit size Medium
Significant Yes
Discovery year 1966
Discoverer El Paso Natural Gas Co.
Mining method Auger Mining - Leaching In Place (In Situ)
Year of first production 1976
Milling method Leach-Solvent-Extract-Precipitation

Mining district

District name Lakeshore

Mineral rights holdings

Type of mineral rights Located Claim
Type of mineral rights Patented
Type of mineral rights Private Lease

Ownership information

  • Type Owner
    Owner Noranda
    Interest 100
    Last year 1987
  • Type Owner-Operator
    Owner Cyprus Amax Minerals
    Interest 100
    First year 1987
    Last year 1999
  • Type Owner-Operator
    Owner Phelps Dodge
    Interest 100
    First year 1999
    Last year 2007
  • Type Owner-Operator
    Owner Freeport-McMoran Copper and Gold Inc
    Interest 100
    Home office Arizona
    Year 2009
    First year 2007
  • Type Lessor
    Owner Tohono O'Odham Nation
    Interest 100
    Home office Arizona
    Year 1994

Comments on the ownership information

  • Mill Op Costs Are Increased By 30% After 15 Yrs Of Operation Instead Of Mill Capital Replacement. Cyprus Minerals Purchased Lakeshore From Noranda Inc. In June 1987 For Undisclosed Price Cyprus Minerals Merged With Amax Inc In November 1993

Production statistics

  • Year 1976
    Period 1929-1976
    Material AU
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 2wt-pct
  • Year 1976
    Description Bumines Statistics 1266500 Short Tons Oxide Ore
  • Year 1976
    Description Bumines Statistics 1010899 Short Tons Sulfide Ore
  • Year 1977
    Description Bumines Statistics 1271000 Short Tons Oxide Ore
  • Year 1977
    Description Bumines Statistics 1216000 Short Tons Sulfide Ore
  • Year 1978
    Period 1976-1978
    Material Cu Leach
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 1wt-pct
  • Year 1978
    Period 1976-1978
    Material Cu Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 1wt-pct
  • Year 1981
    Description Noranda Annual Report, 1981 1767000 Short Tons Oxide Ore
  • Year 1982
    Description 1471830 Mt Ore Mined
  • Year 1982
    Description 20689 Mt Cathode Cu Produced
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 20689mt
  • Year 1983
    Description 15547 Mt Cu Prod From Ore
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 15547mt
  • Year 1983
    Description 1471 Mt Cu Produced From Ppt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 1471mt
  • Year 1983
    Description 965640 Mt Ore Mined
  • Year 1984
    Description Cu Prd From In-Situ Leach & Sx-Ew 5986 Mt Cathode Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 5986mt
  • Year 1985
    Description Cu Prd From In-Situ Leach & Sx-Ew 6130 Mt Cathode Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 6130mt
  • Year 1986
    Description Cu Prd From In-Situ Leach & Sx-Ew 3220 Mt Cathode Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 3220mt
  • Year 1987
    Description Cu Prd From In-Situ Leach & Sx-Ew 1880 Mt Cathode Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 1880mt
  • Year 1988
    Description Cu Prd From In-Situ Leach & Sx-Ew 1950 Mt Cathode Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 1950mt
  • Year 1989
    Description Cu Prd From In-Situ Leach & Sx-Ew 2270 Mt Cathode Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 2270mt
  • Year 1990
    Description Cu Prd From In-Situ Leach & Sx-Ew 1130 Mt Cathode Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 1130mt
  • Year 1991
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 270mt
  • Year 1991
    Description Cu Prd From In-Situ Leach & Sx-Ew 3110 Mt Cathode Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 3110mt
  • Year 1992
    Description Cu Prd From In-Situ Leach & Sx-Ew 454 Mt Cathode Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 454mt
  • Year 1993
    Description Cu Prd From In-Situ Leach & Sx-Ew 136 Mt Cathode Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Copper Copper 136mt
  • Year 1994
    Material Cyprus Amax 1994 10K p. 3.
    Ore mined 4500000mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 11000mt 1wt-pct
  • Year 1995
    Material Cyprus Amax 1995 10K p. 3.
    Ore mined 7300000mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 15000mt 0wt-pct
  • Year 1996
    Period 1976-1996
    Ore mined 29855000mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 159000mt
  • Year 1996
    Material Cyprus Amax 1996 10K p. 3.
    Ore mined 9000000mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 18000mt 1wt-pct
  • Year 1997
    Material Cyprus Amax 1997 10K p. 4.
    Ore mined 2700000mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 12000mt 1wt-pct
  • Year 1998
    Material From leach stockpiles. Cyprus Amax 1998 10K p. 4.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 3600mt
  • Year 2005
    Material From leach stockpiles. Phelps Dodge 2006 10K p. 15.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 2300mt
  • Year 2006
    Material From leach stockpiles. Phelps Dodge 2006 10K p. 15.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 2400mt
  • Year 2007
    Material From leach stockpiles. Freeport-McMoRan 2008 10K p. 21.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 1400mt
  • Year 2008
    Material From leach stockpiles. Freeport-McMoRan 2008 10K p. 21.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 900mt

Comments on the production information

  • Y-Lin Refers To Commodity Record Number. The Recovery Percentage For Product C Is A Combined Recovery For The Sulfide/Oxide Beneficiation Plant. Calculated Recovery Is 85.49%. Circuit Recoveries Are: Oxide-80% Sulfide-90%.

Reserves and resources

  • Type In-situ
    Name total mineralized material
    Estimate year 2010
    Total resources 483000000mt ore
    Remarks Freport-McMoRan 2011 10-K, p. 39.
    Commodity Subtype Grade units Group Importance Year
    Copper Sulfide 0.67 wt-pct Copper Primary 2010
  • Type In-situ
    Name total mineralized material
    Estimate year 2009
    Indicated 527000000mt ore
    Remarks Freeport-McMoRan 2009 10K p. 40.
    Commodity Subtype Grade units Group Importance Year
    Copper 0.68 wt-pct Copper Primary 2009
  • Type In-situ
    Estimate year 2008
    Total endowment 716700000mt ore
    Remarks Lakeshore deposit total endowment. 4.71 million mt contained Cu metal.\nSinger 2008 in PorCuEX2008.xls.
    Commodity Subtype Grade units Group Importance Year
    Copper 0.657 wt-pct Copper Primary 2008
    Silver 1.2 g/mt Silver Tertiary 2008
    Gold 0.17 g/mt Gold Tertiary 2008
  • Type In-situ
    Estimate year 1995
    Reserves 72500000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.83 wt-pct Copper Primary 1995
  • Type In-situ
    Estimate year 1994
    Measured 20000000mt ore
    Demonstrated 20000000mt ore
    Total resources 20000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.67 wt-pct Copper Major 1994
  • Type In-situ
    Estimate year 1983
    Total resources 9977000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Oxide Cu 1.35 wt-pct Copper Secondary 1983
    Molybdenum Mo 0.01 wt-pct Molybdenum Secondary 1983
    Copper Sulfide Cu 1.16 wt-pct Copper Secondary 1983
  • Type In-situ
    Estimate year 1969
    Total resources 109297000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Oxide Cu 0.71 wt-pct Copper Secondary 1969
    Copper Sulfide Cu 1.7 wt-pct Copper Secondary 1969
  • Type In-situ
    Estimate year 1982
    Measured 8100000mt ore
    Demonstrated 8100000mt ore
    Total resources 8100000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 1.35 wt-pct Copper Major 1982
  • Type In-situ
    Estimate year 1995
    Reserves 438000000mt ore
  • Type In-situ
    Estimate year 1982
    Measured 37000000mt ore
    Demonstrated 37000000mt ore
    Total resources 37000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.65 wt-pct Copper Major 1982
  • Type In-situ
    Estimate year 1996
    Demonstrated 1090000mt ore
    Total resources 1090000mt ore
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.51 wt-pct Copper Major 1996

Comments on the reserve resource information

  • Also Known As Lakeshore. Mine Is Operating As An Underground In-Situ Leach Operation Which Produced Only 45 Mt Copper In 1992.

Workings at the site

  • Type of workings Underground
    Overall depth 378M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ACTUAL
    Mining Method BLOCK CAVING 10-79
    Swell Factor .75
    Percent Waste Rock 5
    Percent Recovery 100
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 5
    Length of Inclines (m) 2246
    Slope of Inclines 15
    Number of Inclines 2
    1st Condition of Workings OPEN
    Capacity 5440
    Capacity Units MT ORE/DAY
    Unit Production Cost 10.97
    Units of Production $/MT ORE
    Operating Days per Year 360
    Operating Shifts per Day 3
    Year of Information 1982
  • Type of workings Underground
    Overall depth 378M
    Field Value
    MAS Development Schedule # 1
    Mining Record # 2
    Status of Mining Method ESTIMATE
    Mining Method LEACHING IN PLACE (IN SITU) 10-89
    Swell Factor .75
    Percent Waste Rock 5
    Percent Recovery 50
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics NONCOHERENT
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. POST, HEADBOARD, CAPS, ROOF BOLTS
    Number of Shafts 5
    Length of Inclines (m) 2246
    Slope of Inclines 15
    Number of Inclines 2
    1st Condition of Workings OPEN
    Capacity 5678
    Capacity Units LITER SOLN/MIN
    Operating Days per Year 360
    Operating Shifts per Day 3
    Year of Information 1983
  • Type of workings Underground
    Overall depth 378M
    Field Value
    MAS Development Schedule # 2
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method LEACHING IN PLACE (IN SITU) 10-89
    Swell Factor .75
    Percent Waste Rock 0
    Percent Recovery 50
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics NONCOHERENT
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. OTHER
    Number of Shafts 5
    Length of Inclines (m) 2246
    Slope of Inclines 15
    Number of Inclines 2
    1st Condition of Workings OPEN
    Capacity 5678
    Capacity Units LITER SOLN/MIN
    Operating Days per Year 360
    Operating Shifts per Day 3
    Year of Information 1983
  • Type of workings Underground
    Overall depth 378M
    Field Value
    MAS Development Schedule # 2
    Mining Record # 2
    Status of Mining Method ACTUAL
    Mining Method BLOCK CAVING 10-79
    Swell Factor .75
    Percent Waste Rock 5
    Percent Recovery 100
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. OTHER
    Number of Shafts 5
    Length of Inclines (m) 2246
    Slope of Inclines 15
    Number of Inclines 2
    1st Condition of Workings OPEN
    Capacity 5440
    Capacity Units MT ORE/DAY
    Unit Production Cost 10.97
    Units of Production $/MT ORE
    Operating Days per Year 360
    Operating Shifts per Day 3
    Year of Information 1983
  • Type of workings Underground
    Overall depth 378M
    Field Value
    MAS Development Schedule # 2
    Mining Record # 3
    Status of Mining Method PROPOSED
    Mining Method CAVING METHODS
    Swell Factor .75
    Percent Waste Rock 5
    Percent Recovery 100
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. OTHER
    Number of Shafts 5
    Length of Inclines (m) 2246
    Slope of Inclines 15
    Number of Inclines 2
    Capacity 15417
    Capacity Units MT ORE/DAY
    Unit Production Cost 7.89
    Units of Production $/MT ORE
    Operating Days per Year 360
    Operating Shifts per Day 3
    Year of Information 1983
  • Type of workings Underground
    Overall depth 378M
    Field Value
    MAS Development Schedule # 2
    Mining Record # 4
    Status of Mining Method PROPOSED
    Mining Method CAVING METHODS
    Swell Factor .75
    Percent Waste Rock 5
    Percent Recovery 100
    Hardness of Rock HARDROCK WITH LITTLE WATER
    Rock Characteristics ONE SYSTEM OF WEAKNESS PLANES
    Rock Support Chars. SUPPORTING MAY BACK SLAB
    Mine Support Chars. OTHER
    Number of Shafts 5
    Length of Inclines (m) 2246
    Slope of Inclines 15
    Number of Inclines 2
    Capacity 9977
    Capacity Units MT ORE/DAY
    Unit Production Cost 7.08
    Units of Production $/MT ORE
    Operating Days per Year 360
    Operating Shifts per Day 3
    Year of Information 1983
  • Type of workings Surface/Underground
    Overall depth 914.4M

Comments on the workings information

  • Water Is Pumped From Wells On Site And From Wells 7 Miles Away.
  • Oxide Ore By Open Pit In Early Production, Sulfide And Tactite Ore By Room & Pillar, Block Caving. In 1884 Had 112 Ft Shaft & Drifting. In 1914 A New Vertical Shaft To 285 Ft. In 1993, An In-Situ Leach Operation.

Comments on other economic factors

  • The Operation Was Shut Down In September, 1977 Due To Economic Problems & The Price Of Copper. Operation Reopened By Noranda In January 1980. Following Development Work And Other Delays, Full Production Of 5440 Mtpd Was Achieved In January 1981.

Comments on development

  • Previous Operator Hecla Mining Co And Noranda Lakeshore Mines, Inc. (1983); Ore Outcrop In Bottom Of Shallow Arroyo Was Discovered In Early 1880'S By Trout & Atchison. Based From Papago Indians 6 Patented And 19 Unpatented Lode Claims Encompasing 402 Acres; In Addition 10,142 Acres Leased From Papago Indians. Further Property Evaluation Was Undertaken In 1993.

Reference information

Bibliographic references

  • Reserve-Resource

    'PCIA 1976-93; Cyprus-Amax Form 10K 1994-1996

  • Geology

    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.

  • Ownership

    Pay Dirt (Ariz.) 3/78 (Superior Deal)

  • Production

    Griffith,W.A., Et Al., Oct. 24, 1973, Development Of The Roast-Leach-Electrowin Process For Lakeshore, Heclamining Co. (Processing)

  • Other Database

    Cimri

  • Deposit

    Long, K.R., 1995, Production and reserves of Cordilleran (Alaska to Chile) porphyry copper deposits; in Pierce, F.W. and Bolm, J.G., eds., Porphyry Copper Deposits of the American Cordillera, Arizona Geological Society, Digest 20, p. 35-68.

  • Production

    E/Mj 6/75 (Beneficiation)

  • Deposit

    Johnston, W.P., 1972, K-Ar dates on intrusive rocks and alteration associated with the Lakeshore porphyry copper deposit, Pinal County, Arizona; Isochron/West: A Bulletin of Isotopic Geochronology, v. 4, p. 29-30.

  • Reserve-Resource

    Pay Dirt 6/23/69, P. 20 (Reserves)

  • Deposit

    Singer and others, 2008

  • Reserve-Resource

    E/Mj 3/69, P. 172 (Reserves)

  • Deposit

    Harper and Reynolds ,1969

  • Reserve-Resource

    Pay Dirt 2/24/69 (Reserves)

  • Deposit

    Romslo, 1950, USBM Ic 4706.

  • Deposit

    South, 1972, M.S. Thesis, Univ Of Az.

  • Reserve-Resource

    World Mining, 10/76, P. 56 (Reserves)

  • Reserve-Resource

    Noranda 1984 Ann. Rept. - Tactite Ore.

  • Deposit

    Harper and Reynolds, 1969, Mining Cong. Jour., V. 55, No. 11, P. 26-30

  • Reserve-Resource

    Mining Record. Cyprus To Purchase Lakeshore Copper Facilities In Arizona; Wed., June 17, 1987, Denver, Co, P 1. (Grade Not Given)

  • Deposit

    Greeley, 1978, Admr Special Report No. 2, P. 83-87.

  • Reserve-Resource

    Cyprus Minerals Co., Form 10-K Report. 12/31/92, P1.

  • Deposit

    Sawyer, M.B., Gurmendi, A.C., Daley, M.R., And Howell, S.B., 1992, Principal Deposits Of Strategic And Critical Minerals In Arizona: United States Bureau Of Mines Special Publication, 334 P.

  • Reserve-Resource

    Cyprus Amax Minerals Company, Form 10-K, 12/31/95, P2.

  • Deposit

    Arizona Department Of Mines And Mineral Resources, 1994, Directory Of Active Mines In Arizona, Incorporating Sand and Gravel Operations -- 1994: Arizona Department Mines And Mineral Resources Directory 42, 24 P.

  • Deposit

    Phillips, K.A., Beard, R.R., Niemuth, N.J., And Bain, D.R., 1991, Active Mines In Arizona--1992: Arizona Department Of Mines And Mineral Resources Directory 39, 20 P.

  • Deposit

    Petrick, Lakeshore, In Class Notes C.S.M.

  • Deposit

    Mining Magazine 6/77 (General)

  • Deposit

    Builder Architect/Contractor Engineer, 11/76, P.14 (General)

  • Deposit

    Skillings 11/20/76, P. 12 (General)

  • Deposit

    Pay Dirt 8/25/75 (General)

  • Deposit

    Mining Magazine, 5/75, P.335 (Processing, Byprod., Trans.)

  • Deposit

    Skillings 6/15/74 (General)

  • Deposit

    E/Mj 8/73 (General)

  • Deposit

    Skillings 2/13/71 (General)

  • Deposit

    Skillings 8/22/70 (General)

  • Deposit

    Pay Dirt 3/70 (History, Geology)

  • Deposit

    Mining Congress Journal 11/69, P.26 (General, Reserves)

  • Deposit

    Pay Dirt 9/29/69 (General)

  • Deposit

    E/Mj 6/69 (General, Geology)

  • Deposit

    Pay Dirt 4/28/69 (General)

  • Deposit

    Mining Congress Journal 3/69 (General, Reserves)

  • Deposit

    Hecla Mining Co., Annual Reports 1970-1976

  • Deposit

    Given, I.A., Ed., Mining Engineering Handbook, Vol. 1, Sme-Aime, 1973.

  • Deposit

    Randol Mining Directory, 1996/97, U.S. Mines And Mining Companies, P144.

General comments

Subject category Comment text
Deposit Associated Rocks: quartz monzonite, quartz monzonite porphyry, skarn;n.d.;andesite, conglomerate, diabase, fanglomerate, limestone, quartzite, schist, volcaniclastics
Deposit The Deposit Has 3 Principal Parts: 1) A Core Of Disseminated Sulfide Ore In Quartz Monzonite; 2) A Tactite Ore In Paleozoic And Prec Sediments At The Base And Marginal To The Thick Sulfide Deposit; And 3) An Enriched Blanket Of Oxide Ore Formed By Oxidation Of A Secondary Enriched Chalcocite Blanket Overlying The Core. A High-Angle Reverse Fault Offsets The Overlying Oxide Zone To The West From The Central Sulfide Zone On The East. Pyrite: Chalcopyrite Suggests A Pyrite Halo. USBM Gives Orebody Dimensions As: 6000 Ft Long, 1080 Ft Thick, 2500 Ft Wide, 500 Ft Deep.

Reporter information

Type Date Name Affiliation Comment
Reporter 04-AUG-09 Anderson, Claire U.S. Geological Survey
Reporter 26-JUN-97 Buckingham, David A. U.S. Bureau of Mines
Editor 09-JUN-95 Mosier, Dan U.S. Geological Survey
Updater 01-MAY-93 Carbonaro, Marguerite M. U.S. Geological Survey
Updater 10-JUN-92 Beougher, Dee (Spanski, Gregory T.) U.S. Geological Survey
Reporter 01-APR-83 Peterson, Jocelyn A. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Operator history (post-MRDS)

MRDS records operators as of each record's last update (≤ 2019). Some of the operators listed here have since changed hands or dissolved:

  • Cyprus Amax Minerals — now part of Subsidiary of Freeport-McMoRan (2007)
    Formed by merger of Cyprus Minerals and AMAX in 1993; acquired by Phelps Dodge in 1999; Phelps Dodge acquired by Freeport-McMoRan in 2007.

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.

Maps centered on this site

Authoritative Arizona resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.