Molybdenum Business Unit

Thompson Creek Mine

IDAHO USA

The Thompson Creek Mine is a primary, surface molybdenum mine and mill located approximately 48 kilometres southwest of the town of Challis in Idaho’s Custer County.

The mine, which began operations in 1983, uses conventional open-pit mining methods with large electric-powered shovels that can each move up to 100,000 tons of waste rock and ore per day. The shovels load ore into 200-ton trucks to be hauled to an on-site mill (concentrator). A molybdenum disulfide concentrate is processed from the ore through a series of crushing, grinding, and flotation operations.

Daily throughput of ore at the mill averages close to 28,000 tons per day. Most of the molybdenum disulfide concentrate produced at the mine is further processed into technical grade molybdenum oxide at the Langeloth Metallurgical Facility in Pennsylvania. A small portion of the concentrate in the form of high performance molybdenum is packaged at the mine and sold directly to customers.

The mine and concentrator were placed on care and maintenance in December 2014 when the mining and processing of Phase 7 ore was completed. In September 2023, Centerra announced it had completed a prefeasibility study on the restart of mining at Thompson Creek, with the objective of realizing value for the asset itself and the Molybdenum Business Unit as a whole. The Company is now advancing early works for a phased restart of the Thompson Creek Mine and expects the feasibility study to be complete by mid-2024.

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Endako Mine

BRITISH COLUMBIA, CAN

The Endako Mine is a primary, surface molybdenum mine located near Fraser Lake, 161 kilometres northwest of Prince George, British Columbia. The mine is operated as a joint venture with Thompson Creek holding a 75% interest and Sojitz Corporation, a Japanese company, holding a 25% interest.

The Endako Mine is a fully integrated facility that began operations in 1965. It includes a concentrator that processes ore through crushing, grinding, and flotation circuits into molybdenum disulfide concentrate, and a multiple-hearth roasting facility that converts the concentrate into technical grade molybdenum oxide.

The mine and concentrator were placed on care and maintenance in July 2015 due to ongoing weakness in the molybdenum price. We expect to re-evaluate the status of Endako Mine as market conditions warrant.

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Endako 2

Langeloth Metallurgical Facility

PENNSYLVANIA, USA

The Langeloth facility, located 40 kilometres west of Pittsburgh, Pennsylvania, is among the largest molybdenum conversion plants in North America, with a long history of producing high-quality products that are sold to the metallurgical and specialty markets. Langeloth operates as a toll processor, secondary to purchasing molybdenum concentrates from third parties.

The facility has roasting capacity of 36 million pounds of roasted molybdenum and more than 9 million pounds of molybdenum oxide as ferromolybdenum.

Workers at LANGELOTH METALLURGICAL FACILITY
Langeloth location map

Resources

  Tonnes (Kt)Mo Grade (%)Contained
Molybdenum (Mlbs)
Thompson Creek MineMeasured57,6450.0792
 Indicated59,4980.0785
 Total M&I(1)117,1430.07177
 Inferred(2)8060.041
Endako MineMeasured47,1000.0548
 Indicated122,1750.04118
 Total M&I(1)169,2750.04166
 Inferred(2)47,3250.0444