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United States
Morenci Mine

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 Location:
44 km NE from Safford, Arizona, United States

  Regional Office:
333 N. Central Ave.
Phoenix
Arizona, United States
85004
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StageProduction
Mine TypeOpen Pit
Commodities
  • Copper
  • Molybdenum
Mining Method
  • Truck & Shovel / Loader
Processing
  • Dewatering
  • Crush & Screen plant
  • Crush-and-stack plant
  • Flotation
  • Heap leach
  • ROM/dump leach
  • Solvent Extraction & Electrowinning
Mine Life2044
One of Morenci’s concentrators, which has a milling capacity of approximately 50,000 metric tons of ore per day was restarted in July 2021 after being on care and maintenance status and is expected to resume operating at full capacity in early 2022.


Owners

Source: p. 11
CompanyInterestOwnership
Sumitomo Corp. 28 % Indirect
Freeport-McMoRan Inc. 72 % Indirect
Freeport owns a 72 percent undivided interest in Morenci, with the remaining 28 percent owned by Sumitomo Metal Mining Arizona, Inc. (15 percent) and SMM Morenci, Inc. (13 percent).

Deposit Type

  • Porphyry


Summary:

The Morenci mine is a porphyry copper deposit that has oxide, secondary sulfide and primary sulfide mineralization. The predominant oxide copper mineral is chrysocolla. Chalcocite is the most important secondary copper sulfide mineral, with chalcopyrite as the dominant primary copper sulfide.


Mining Methods

  • Truck & Shovel / Loader


Summary:

Morenci is an open-pit copper mining complex that has been in continuous operation since 1939 and previously was mined through underground workings.

Morenci’s available mining fleet consists of one hundred and fifty-four 236-metric-ton haul trucks loaded by 13 electric shovels with bucket sizes ranging from 47 to 57 cubic meters. Morenci’s mining fleet is capable of moving an average of 815,000 metric tons of material per day.


Crushing and Grinding


Processing

  • Dewatering
  • Crush & Screen plant
  • Crush-and-stack plant
  • Flotation
  • Heap leach
  • ROM/dump leach
  • Solvent Extraction & Electrowinning

Source: Subscription required

Summary:

The Morenci operation consists of two concentrators with a milling design capacity of 132,000 metric tons of ore per day, which produce copper and molybdenum concentrate; a 72,500 metric ton-per-day, crushed-ore leach pad and stacking system; a low-grade run-of-mine (ROM) leaching system; four SX plants; and three EW tank houses that produce copper cathode. Total EW tank house capacity is approximately 900 million pounds of copper per year.


Production:

CommodityProductUnits2021202020192018201720162015
Copper Metal M lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required1,0001,0001,1001,060
Molybdenum Metal in concentrate M lbs  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Daily mining capacity  ......  Subscription required  ......  Subscription required815,000 t815,000 t815,000 t815,000 t
Daily milling capacity  ......  Subscription required  ......  Subscription required132,000 t115,000 t115,000 t115,000 t
Annual production capacity  ......  Subscription required  ......  Subscription required900 M lbs of copper cathode900 M lbs of copper cathode900 M lbs of copper cathode900 M lbs of copper cathode
Subscription required - Subscription is required.

Reserves at December 31, 2021:
Mineral Reserves Cut-off grades: Mill - 0.21 % CuEq, Heap leach - 0.14 % CuEq, ROM leach - 0.03 % CuEq.
Mineral Resources Cut-off grades: Mill - 0.14 % CuEq, Heap leach - 0.02 % CuEq.

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven Heap leach 501 Mt Copper 0.37 %
Proven ROM leach 2,011 Mt Copper 0.14 %
Proven Sulphide 784 Mt Copper 0.37 %
Proven Sulphide 784 Mt Molybdenum 0.02 %
Probable Heap leach 87 Mt Copper 0.35 %
Probable ROM leach 424 Mt Copper 0.15 %
Probable Sulphide 110 Mt Copper 0.35 %
Probable Sulphide 110 Mt Molybdenum 0.02 %
Proven & Probable Heap leach 589 Mt Copper 0.37 % 3.9 B lbs
Proven & Probable ROM leach 2,435 Mt Copper 0.14 % 2.8 B lbs
Proven & Probable Sulphide 894 Mt Copper 0.37 % 5.9 B lbs
Proven & Probable Sulphide 894 Mt Molybdenum 0.02 % 0.15 B lbs
Measured Heap leach 1,135 Mt Copper 0.16 %
Measured Sulphide 1,280 Mt Copper 0.25 %
Measured Sulphide 1,280 Mt Molybdenum 0.02 %
Indicated Heap leach 898 Mt Copper 0.16 %
Indicated Sulphide 1,077 Mt Copper 0.27 %
Indicated Sulphide 1,077 Mt Molybdenum 0.02 %
Inferred Heap leach 522 Mt Copper 0.12 %
Inferred Sulphide 570 Mt Copper 0.27 %
Inferred Sulphide 570 Mt Molybdenum 0.02 %
Total Resource Heap leach 2,555 Mt Copper 0.15 % 8.6 B lbs
Total Resource Sulphide 2,928 Mt Copper 0.26 % 16.8 B lbs
Total Resource Sulphide 2,928 Mt Molybdenum 0.02 % 1.11 B lbs

Financials:

Units2021202020192018201720162015
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required300   158.3   106.9   351.4  
Operating Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required1,082   1,196   1,588   640.3  
Subscription required - Subscription is required


Heavy Mobile Equipment as of December 31, 2021:
HME TypeSizeQuantity
Shovel (rope) 57 cu. m ....................... Subscription required
Truck (haul) 236 t ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Apr 20, 2022
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....................... Subscription required ....................... Subscription required Subscription required Apr 20, 2022
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2017
Subscription required 2015
Subscription required 2014

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Form 10-K 2018
Fact Sheet 2017
Form 10-K 2017
Form 10-K 2016
Fact Sheet 2015
Form 10-K 2015
Form 10-K 2014
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