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United States
Resolution Project

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 Location:
3 km E from Superior, Arizona, United States

  Project Contacts:
402 W. Main Street
Superior
Arizona, United States
85173
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Overview

StagePermitting
Mine TypeUnderground
Commodities
  • Copper
  • Molybdenum
Mining Method
  • Panel caving
  • Block caving
Mine Life40 years (as of Jan 1, 2021)
Resolution Copper is one of the largest undeveloped copper projects in the world and has the potential to become one of the largest copper producers in North America.

During FY2022, Resolution continued the engineering and permitting phase of the project. The project is subject to a federal permitting process led by the US Forest Service. The US Forest Service published a Final Environmental Impact Statement in January 2021, which was rescinded in March 2022 for the stated purpose of conducting additional analysis and consultation with Native American tribes.

The Resolution Copper Project is also required to obtain several state and local permits, including air quality and groundwater protection permits.

On 20th September 2022, Stantec has been selected by Resolution Copper Mining LLC to deliver a $16 million feasibility study.


Owners

Source: p. 29,60,206
CompanyInterestOwnershipInvestor's Info
BHP Group Ltd. 45 % Indirect
Rio Tinto plc 55 % Indirect
Resolution Copper Mining, LLC (operator) 100 % Direct
Resolution Copper Mining is jointly owned by Rio Tinto (55 per cent) and BHP (45 per cent) and managed by Rio Tinto. Operator: Resolution Copper Mining LLC.

Contractors

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Deposit Type

  • Porphyry


Summary:

The project is located within a geological region known as the Basin and Range province, near the boundary with another geological region known as the Arizona Transition Zone.

Structural Geology
The Resolution ore deposit, lying about 4,500 to 7,000 feet below Oak Flat, is located in a structural feature called the “Resolution Graben.” A graben is an area that is bounded on the sides by normal faults and is downthrust below those faults. The Resolution Graben is bounded by the West Boundary, North Boundary, South Boundary, Conley Springs, and Rancho Rio Faults.

Resolution ore deposit
The Resolution ore deposit is approximately 64 million years old and is a porphyry copper-molybdenum deposit. It lies approximately 4,500 to 7,000 feet below Oak Flat. As defined by the 1 percent copper shell, the deposit extends over an area of at least 1.2 miles in an east-northeast direction, and 0.9 mile in a north-northwest direction

Rock types with diabase, limestone, and local breccia host and control the strongest copper mineralization. Quartz-rich sedimentary rocks and Cretaceous-Tertiary intrusive rocks demonstrate the strongest molybdenum mineralization. The highest copper grades (greater than 3 percent) are located in the upper central portion of the deposit associated with a large hydrothermal breccia body and hosted primarily in breccia and diabase. The total mineral resource at the Resolution ore deposit is currently estimated (indicated ........


Mining Methods

  • Panel caving
  • Block caving


Summary:

Resolution Copper proposes to mine the copper deposit under the Oak Flat Federal Parcel using a method known as panel caving.

Operational projections are removal of 1.4 billion tons of ore and production of 40 billion pounds of copper using a mining technique known as panel caving. Using this process, a network of shafts and tunnels is constructed below the ore body. Access to the infrastructure associated with the panel caving would be from vertical shafts in an area known as the East Plant Site, which would be developed adjacent to the Oak Flat Federal Parcel. This area would include mine shafts and a variety of surface facilities to support mining operations. This area currently contains two operating mine shafts, a mine administration building, and other mining infrastructure.

At full operation, underground mining would produce 132,000 to 165,000 tons of ore per day. Ore would be crushed underground before being transported to two production shafts that would hoist the ore to an offloading station approximately halfway to the surface. From the offloading station, a conveyor system would transport the ore underground to the concentrator complex at the West Plant Site, approximately 2.25 miles west of the East Plant Site.

Shafts and Hoist Facilities
Shafts and hoist facilities will be utilized for access to the underground workings and are integral to ore production and operations at East Plant Site.

At full production, ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityProductUnitsDailyAvg. AnnualLOM
Copper Metal in concentrate M lbs 40,000
Molybdenum Concentrate kt  ......  Subscription required
Copper Concentrate kt  ......  Subscription required *

Operational Metrics:

Metrics
Daily ore mining rate  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
* According to 2021 study.
Subscription required - Subscription is required.

Reserves at December 31, 2020:
The Mineral Resources as at 31th December 2021 at Resolution are unchanged from December 31, 2020.

CategoryTonnage CommodityGrade
Indicated 530 Mt Copper 1.92 %
Indicated 530 Mt Molybdenum 0.039 %
Inferred 1,257 Mt Copper 1.36 %
Inferred 1,257 Mt Molybdenum 0.035 %
Total Resource 1,787 Mt Copper 1.53 %
Total Resource 1,787 Mt Molybdenum 0.036 %


Pipelines
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Proposed Heavy Mobile Equipment as of January 1, 2021:
HME Type
Cable bolter
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Mine Management:

Job TitleNameEmailProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 3, 2022
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Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
Annual Report 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Mine Operations Plan 2016
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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