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Chino Mine

Producer in Grant county in New Mexico, United States with commodities Copper, Gold, Silver, Molybdenum, PGE, Lead
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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. Land status
  18. Ownership information
  19. Production statistics
  20. Reserves and resources
  21. Links to other databases
  22. Bibliographic references
  23. General comments
  24. Reporter information

Geologic information

Identification information

Deposit ID 10087992
MRDS ID D012103
Record type Deposit
Current site name Chino Mine
Alternate or previous names Santa Rita Mine, Santa Rita Del Cobre Mine Grant

Geographic coordinates

Geographic coordinates: -108.06644, 32.794 (WGS84)
Elevation 1951
Relative position ABOUT 12 MILES N 84 E OF SILVER CITY, NM

Site location context

Political divisions (FIPS codes)

Grant(county)

New Mexico(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Santa Rita Mine(quadrangle 1:24,000 scale)

Silver City(quadrangle 1:100,000 scale)

Silver City(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Mimbres(hydrologic unit)

Mimbres(hydrologic accounting unit)

Rio Grande-Mimbres(hydrologic subregion)

Rio Grande(hydrologic region)

Geographic areas

Country State County
United States New Mexico Grant

Public Land Survey System information

Meridian Township Range Section Fraction State
New Mexico 017S}018S 012W}012W 26,27,34,35} New Mexico

Comments on the location information

  • The Location Is Accurate For The Approximate Center Of The Chino Mines Open Pit. Info From Land.St :1979

Commodities

Commodity Importance
Copper Primary
Gold Primary
Silver Primary
Molybdenum Primary
PGE Critical Secondary
Lead Tertiary

Comments on the commodity information

  • Supergene Minerals Are Chalcocite, Covellite, Native Copper, Chrysocolla, Cuprite, Malachite, And Azurite. Primary Minerals (Replacement Deposits) Are Chalcopyrite And Magnetite. Primary Minerals (Porphyry) Are Chalcopyrite, Bornite, And Molybdenite.

Materials information

Materials Type of material
Bornite Ore
Chalcocite Ore
Chalcopyrite Ore
Chrysocolla Ore
Copper Ore
Covellite Ore
Cuprite Ore
Malachite Ore
Halloysite Gangue
Kaolinite Gangue
Magnetite Gangue
Quartz Gangue
Sericite Gangue

Alteration

  • (Local) See Comments

Analytical data

Result AVERAGE MO GRADE 0.012% MOS2

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 > Mafic Intrusive Rock > Diorite
    Rock unit name Santa Rita Stock
    Rock description Santa Rita Stock
    Stratigraphic age (youngest) Paleocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Chino (Santa Rita) Stock;Montoya Dolomite;Fusselman Dolomite;Lake Valley Limestone;Oswaldo Formation;Syrena Formation
    Rock description Chino (Santa Rita) Stock;Montoya Dolomite;Fusselman Dolomite;Lake Valley Limestone;Oswaldo Formation;Syrena Formation

Nearby scientific data

(1) -108.06644, 32.794
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Santa Rita Stock, Complex Network Of Faults
Type of structure Local
Structure description Deposit Lies In A Horst Bound On The West By The Nw-Trending Silver City Fault And On The East By The Nw-Trending Mimbres Fault. Sediments Within The Horst Are Synclinal And Domed By Intrusives.

Ore body information

  • General form BLANKET
    Thickness 182.88M
    Length 1219.2M
    Width 914.4M
  • Name Santa Rita Stock
    General form Tabular, Massive
    Strike North 45 Degrees East
    Dip 00 Degrees West
    Length 2500M
    Width 2000M
    Depth to top 50M

Controls for ore emplacement

  • Santa Rita Stock

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Large
Significant Yes
Discovery year 1800
Discoverer Known To Native Americans Who Showed Native Copper Ores To Jose Manuel Carrasco; May Have Been Seen By Other Spaniards Earlier.
Mining method Open Pit
Year of first production 1804

Mining district

District name Santa Rita District; Central Mining District

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Jose Manuel Carrasco And Francisco Manuel De Elguea (1801-1804), Francisco Manuel De Elguea (1804-
  • Type Owner
    Owner Jose Manuel Carrasco And Francisco Manuel De Elguea (1801-1804), Francisco Manuel De Elguea And Hei
  • Type Owner
    Owner Mitsubishi Materials Corp
    Interest 33.3
    Year 2009
    First year 1986
    Last year 2003
  • Type Owner-Operator
    Owner Phelps Dodge Corp
    Interest 100
    Year 2009
    First year 2003
    Last year 2006
  • Type Owner-Operator
    Owner Freeport-McMoran Copper and Gold Inc
    Interest 100
    Home office Phoenix, AZ
    Year 2009
    First year 2006

Production statistics

  • Year 1973
    Material CU ORE
    Accuracy Accurate
    Description Ap_Grade: ^Average Ore Grade 0.88% Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Ore Copper Copper 1wt-pct
  • Year 1974
    Material CU ORE
    Accuracy Accurate
    Description Ap_Grade: ^Average Ore Grade 0.86% Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Ore Copper Copper 1wt-pct
  • Year 1989
    Material Leachable material plus millable ore. \nRecovered includes metal in mill concentrates and electrowon. \nPhelps Dodge 1993 10K.
    Ore mined 114309000mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 119300mt
  • Year 1990
    Material Leachable material plus millable ore. \nRecovered includes metal in mill concentrates and electrowon. Phelps Dodge 1993 10K.
    Ore mined 106379000mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 132800mt
  • Year 1991
    Material Leachable material plus millable ore. \nRecovered includes metal in mill concentrates and electrowon. Phelps Dodge 1993 10K.
    Ore mined 109993000mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 142800mt
  • Year 1992
    Material Leachable material plus millable ore. \nRecovered includes metal in mill concentrates and electrowon.\nPhelps Dodge 1993 10K.
    Ore mined 109081000mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 138100mt
  • Year 1993
    Material Leachable material plus millable ore. \nRecovered includes metal in mill concentrates and electrowon.\nPhelps Dodge 1993 10K.
    Ore mined 11430900mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 144700mt
  • Year 1994
    Material Leachable material mined. \nRecovered includes metal in mill concentrates and electrowon. Phelps Dodge 1998 10K.
    Ore mined 95306000mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 144700mt
  • Year 1995
    Material Leachable material mined. Recovered includes metal in mill concentrates and electrowon. Phelps Dodge 1998 10K.
    Ore mined 105071000mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 153000mt
  • Year 1996
    Material Leachable material mined. Recovered includes metal in mill concentrates and electrowon. Phelps Dodge 1998 10K.
    Ore mined 111528000mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 152900mt
  • Year 1996
    Period 1911-1996
    Ore mined 529300000mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Ag Silver Silver 148mt
    Primary Au Gold Gold 15mt
    Primary Cu Copper Copper 4985000mt
  • Year 1997
    Material Leachable material mined. Recovered includes metal in mill concentrates and electrowon. Phelps Dodge 1998 10K.
    Ore mined 110349000mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 153300mt
  • Year 1998
    Material Leachable material plus millable ore. Recovered includes metal in mill concentrates and electrowon. Phelps Dodge 2002 10K.
    Ore mined 110425000mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 143200mt
  • Year 1999
    Material Leachable material plus millable ore. Recovered includes metal in mill concentrates and electrowon. Phelps Dodge 2003 10K.
    Ore mined 54992000mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 118000mt
  • Year 2000
    Material Leachable material plus millable ore. Recovered includes metal in mill concentrates and electrowon. Phelps Dodge 2003 10K.
    Ore mined 68409000mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 123000mt
  • Year 2001
    Material Leachable material plus millable ore. Recovered includes metal in mill concentrates and electrowon. Phelps Dodge 2003 10K.
    Ore mined 56596000mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 70900mt
  • Year 2002
    Material Leachable material mined. Phelps Dodge 2006 10K, p. 13-14.
    Ore mined 200000mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary electrowon Cu Copper Copper 48800mt
  • Year 2003
    Material Leachable material mined. Phelps Dodge 2006 10K, p. 13-14
    Ore mined 11157000mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary electrowon Cu Copper Copper 35300mt
  • Year 2004
    Material Leachable material plus millable ore. Recovered includes metal in mill concentrates and electrowon. Phelps Dodge 2006 10K, p. 13-15.
    Ore mined 43851000mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Mo Molybdenum Molybdenum 8mt
    Primary Cu Copper Copper 83200mt
  • Year 2005
    Material Leachable material plus millable ore. Recovered includes metal in mill concentrates and electrowon. Phelps Dodge 2006 10K, p. 13-15.
    Ore mined 70456000mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Mo Molybdenum Molybdenum 246mt
    Primary Cu Copper Copper 95100mt
  • Year 2006
    Material Leachable material plus millable ore. Recovered includes metal in mill concentrates and electrowon. Phelps Dodge 2006 10K, p. 13-15.
    Ore mined 65947000mt
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Mo Molybdenum Molybdenum 369mt
    Primary Cu Copper Copper 84300mt
  • Year 2007
    Material Freeport-McMoRan 2008 10K, p. 21.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 86200mt
  • Year 2008
    Material Freeport-McMoRan 2010 10K, p. 23.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Cu Copper Copper 70300mt
  • Year 2009
    Material Freeport-McMoRan 2009 10K, p. 23.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Copper Copper 16300mt
  • Year 2010
    Material Freeport-McMoRan 2010 10K, p. 23.
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Copper Copper 15400mt

Comments on the production information

  • Average Grade Of 207 Million Mt Of Ore Mined (1911-1962) Was 0.93% Cu, With Values In Mo, Ag, And Au. Grade Of Primary Ore Below Enriched Zone Probably Averages About 0.1% Cu. Average Grades Reported For Au And Ag Are 0.074 G/Mt And 1.76 G/Mt, Respectively. In 1912 The Average Copper Grade Was Over 2% Cu, In 1925 It Was Averaging 1.5%, In 1948 The Average Grade Of Copper Was Less Than 1% Cu, And In 1980 The Average Grade Of Copper Was 0.81% Cu. Average Molybdenum Grade Of Ore Is 0.012% Mos2. (1) Ore Milled. Small Byproduct Platinum-Group Element Production From Smelter Returns.

Reserves and resources

  • Type In-situ
    Name millable ore
    Estimate year 2010
    Reserves 181000000mt
    Remarks Freeport-McMoRan 2010 AR, p. 33.
    Commodity Subtype Grade units Group Importance Year
    Gold 0.004 g/mt Gold Primary 2010
    Copper 0.57 wt-pct Copper Primary 2010
    Silver 0.51 g/mt Silver Primary 2010
    Molybdenum 0.008 g/mt Molybdenum Primary 2010
  • Type In-situ
    Estimate year 1976
    Total resources 176000mt ore
    Commodity Subtype Grade units Group Importance Year
    Molybdenum Mo 0.012 wt-pct Molybdenum Major 1976
    Copper Cu 0.74 wt-pct Copper Major 1976
  • Type In-situ
    Name run of the mine leachable ore
    Estimate year 2010
    Reserves 222000000mt
    Remarks Freeport-McMoRan 2010 AR, p. 33.
    Commodity Subtype Grade units Group Importance Year
    Copper 0.35 wt-pct Copper Primary 2010
  • Type In-situ
    Estimate year 1996
    Total resources 861500000mt
  • Type In-situ
    Estimate year 1966
    Total resources 54000mt ore
    Commodity Subtype Grade units Group Importance Year
    Molybdenum MoS2 0.01 wt-pct Molybdenum Major 1966
  • Type In-situ
    Name millable or leachable mineralized material
    Estimate year 2010
    Demonstrated 234000000mt
    Remarks Freeport-McMoRan 2010 AR, p. 39.
    Commodity Subtype Grade units Group Importance Year
    Molybdenum 0.012 g/mt Molybdenum Primary 2010
    Copper 0.41 wt-pct Copper Primary 2010
  • Type In-situ
    Estimate year 1911
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 2.24 wt-pct Copper Major 1911
  • Type In-situ
    Estimate year 1991
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.7 wt-pct Copper Major 1991
  • Type In-situ
    Estimate year 1991
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 0.3 wt-pct Copper Major 1991

Comments on the reserve resource information

  • (1) Initial Ore Reserve; (2) Mill Ore Reserve; (3) Leach Ore Reserve
  • Additional Production and Reserve data can be found in Chino; Deposit ID 10296543

Comments on the workings information

  • Worked Underground Up To 1909 When Stripping For Chino Open Pit Began. Most Underground Workings Destroyed During Development And Mining In The Chino Open Pits. Most Other Underground Workings Have Been Covered Up By Mine Dumps, Leach Pads, Surface Plant, And Other Mine Facilities.

Comments on development

  • Patent The Mine Was Refused On The Grounds That It Was Still Owned By The Heirs Of Elguea; Operations Were Abandoned In 1871. In 1872 The Mine Was Relocated By Fresh And Magruder Who Sold Their Claim To Hayes In 1873. Hayes' Application For A Patent Was Also Denied, But He Found The Elguea Heirs And Purchased The Mine Later In 1873. In 1880, Hayes Sold Out To Whitney Who Enlarged His Holdings And Built A 40-Stamp Mill And Smelter, Sank The Romero Shaft To 500 Ft Depth, And Did Some Diamond Drilling 1882 To 1884. Operations Were Divided Between The Bonanza Development Co. And The Santa Rita Copper And Iron Co. The Mine Was Optioned For Two Years By The Hearst Estate In 1897 Which Built A 100 Tpd Mill In That Year. Development Work Located A High-Grade Sulfide Ore Body, The Option Was Exercised And The Santa Rita Copper Mining Co. Formed In 1899 To Develop The Mine. In 1902, The 300 Ft Carrasco Shaft Cut Part Of The Supergene-Enriched Blanket Deposit. Exploration Continued To
  • 1906, During And After Which The Old Workings And Dumps Were Worked By Lessees. The Chino Copper Co. Acquired Title In 1909 And Began Stripping For An Open Pit Mine In 1910. By 1911, 467 Churn Drill Holes, 182,000 Cumulative Feet Drilling, Had Developed About 55 Million St Of 2.24% Cu Ore. The Hurley Mill Began Operating In Oct. 1911 At 5,000 Tpd, Later Expanded To 11,000 Then 15,000 Tpd. In 1924 The Company Merged With The Ray Consolidated Copper Co., Which In Turn Merged With The Nevada Copper Co. In 1926, And With The Kennecott Copper Co. In 1933. Byproduct Molybdenum Concentrate Recovery Began In 1937. A Smelter Was Built At Hurley In 1939 And A Fire Refinery Added In 1942. The Whitewater Leach Plant, Producing Cement Copper, Was Completed In 1963. The Hurley Mill Was Ultimately Expanded To 22,000 Tpd Before Being Replaced By A New 44,000 Tpd Mill At Santa Rita In 1982. The Smelter Was Rebuilt From 1982 To 1984 As A 1570 Tpd Inco Flash Smelter Expanded To 1700 Tpd In
  • 1987. Phelps Dodge Acquired The Mine And Smelter In 1986. A Sx/Ew Plant Was Installed In 1988 Producing 41,000 Tpy Cathode Copper, Expanded In 1993 To 171 Tpd. Mine, Mill, Smelter, And Plant Capacities In 1994 Were 290,000 Tpd Material Mined, Of Which 50,000 Tpd Of 0.68% Cu Material Was Milled Yielding 1,000 Tpd 24% Cu Concentrates Which Are Smelted And 49,000 Tpd 0.18% Cu Tailings Which Are Stockpiled. The Smelter Treats 1,700 Tpd Concentrates And Cement Copper, Yielding 440 Tpd Cu, 2,400 Tpd Sulfuric Acid, 960,000 Lbs/Y Mo, 17,000 Oz/Y Au, And 400,000 Oz/Y Ag. Leach Operations Yield 15 Tpd Cement Copper And 171 Tpd Cathode Copper. Part Of The Smelter Charge Comes From Other Phelps Dodge Mines.
  • In 1800 A Native American Showed Native Copper Ores At Santa Rita To Jose Manuel Carrasco. There Is Some Evidence That Other Spaniards May Have Learned Of The Copper Mineralization Earlier. By 1801 Carrasco And Francisco Manuel De Elguea Had Obtained The Santa Rita Del Cobre Mining Land Grand From The Spanish Crown. Carrasco Sold His Share To Elguea In 1804. After Elguea'S Death In 1809, The Mine Was Worked By A Succession Of Lessees And Subleases, The Elguea Family Or Estate Retaining Ownership. Not All Of The Lessees Have Been Identified. From 1825 To 1827 Juan Ortiz Leased The Mine But Subleased It To Leonardo Siqueros, Sylvester Pattie, And Then Robert Mcknight. Mcknight Acquired The Lease By 1834, But It Passed To Leonardo Siqueros By 1840 Who Retained It Until The Civil War In 1860. Sweete And Lacoste Worked The Mine From 1860 To 1862 When Seized By The Texas Confederacy, But Returned After The Civil War Forming The Santa Rita Mining Association. Their Application To

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit Ore Bodies At Santa Rita Are A Complex Of Typical Porphyry Type Veins And Disseminated Ores That Have Been Secondarily Enriched, And Limestone Replacement Deposits Exhibiting Little Or No Enrichment, In And Around The Pervasively Altered And Intensely Shattered Santa Rita Stock. The Supergene Enriched Zone, Which Provided Much Of The Early-Mined Ore, Occurred Chiefly In The Stock And Peripheral Upper Cretaceous Sedimentary Rocks And Quartz Diorite Sills Where Locally It Is More That 200 M Thick. Replacement (Skarn) Ores Occur Mainly In Penn And Emiss Limestone Of The Lake Valley, Oswaldo, And Syrena Formations, With Less Pervasive Mineralization In Ord And Sil Montoya And Fusselman Dolomites. Skarn Occurs Along The N And NW Border Of The Stock. Protore Grade Is 0.2% Copper.
Deposit This Record Contains Data From Record D011550 By Ron Worl Which Has Been Deleted From Mrds. ; Info.Src : 1 Pub Lit; 2 Unpub Rept
Deposit This Record Includes Data From Mrds Record No D000578 By Robert U. King, 74 08, Which Has Been Deleted. Open Pit Mining At Chino Has Destroyed Or Covered Over Many Small, Older Workings, Including Flux, Keystone, Wildcat, Ivanhoe, Treasure Vault, Tourmaline, Humboldt, Copper Queen, Ninety, Romero, And Carrasco (Hearst)
Deposit Associated Minerals: actinolite, alunite, anhydrite, biotite, bornite, chalcocite, chalcopyrite, chlorite, copper, cuprite, enargite, epidote, galena, garnet, gold, hematite/specularite, kaolinite, magnetite, marcasite, molybdenite, montmorillonite, pyrite, rutile, sericite, siderite, sphalerite, zeolite
Deposit Associated Rocks: breccia, granodiorite porphyry, hornfels, jasper, quartz diorite porphyry, quartz monzonite porphyry, skarn;andesite, andesite breccia, basalt, conglomerate, diorite porphyry, dolomite, gneiss, quartz latite, quartz latite porphyry, rhyolite, rhyolite tuff, sandstone, schist;latite, limestone, marble, quartzite, shale

Reporter information

Type Date Name Affiliation Comment
Reporter 01-AUG-1974 Murray, Diane New Mexico Bureau of Mines and Mineral Resources ADDED PLATINUM INFORMATION, USGS MODEL, REFERENCES, AND SOME PRODUCTION AND RESOURCES INFORMATION
Updater 01-JUL-1984 Seanor, Clint E. (Worl, Ron) U.S. Geological Survey
Updater 01-SEP-1984 King, Robert U. U.S. Geological Survey
Updater 01-DEC-1994 Long, Keith R. U.S. Geological Survey
Updater 20-JAN-2010 Anderson, Claire U.S. Geological Survey

Beyond USGS

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

Current status (per MSHA)

StatusActive since 01/20/2011
MSHA mine ID2900708
Mine name (MSHA)Chino Mines Co Mine
Current operatorFreeport-McMoRan Chino Mines Company
Current controller (parent)Freeport-McMoRan Inc
Mine typeSurface (Metal / non-metal)

Inferred by coordinate + name similarity (1749 m, 1.00 match). Confirm against MSHA if precision matters — non-USGS-curated cross-references may occasionally point at a neighbouring mine.

Open MSHA's Mine Data Retrieval System for inspections, accidents, and violations for this mine.

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:

  • Phelps Dodge Corp — acquired by Subsidiary of Freeport-McMoRan (2007)
    Acquired by Freeport-McMoRan Copper & Gold in 2007 in what was then the largest mining-industry deal ever (~US$26 B).

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.

External references

Maps centered on this site