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Spence Growth Option

Project Stages

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Early Works
Current Stage: Awaiting construction decision
Start: 07/2017
In Construction
Project Details


The Spence growth project aims to process hypogene mineral and expand the mine life by up to 20 years, from 2019 up to 2039, by processing primary sulfides. The project involves the operation of a concentrator plant with a processing rate that ranges from 95,000tpd to 110,000tpd. Mineral processing will be carried out by conventional flotation methods to produce copper and molybdenum concentrate. The project has estimated mineral resources of 515Mt at 0.47% copper (measured), 795Mt at 0.45% copper (indicated) and 1,010Mt at 0.39% (inferred). The project covers an area of 2,855ha and will require an estimated workforce of 4,100 people during the construction phase. BHP Billiton owns the project through its fully-owned subsidiary Minera Spence S.A.

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Principal Works

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  • * Figures and dates are as per the latest publicly available information, as well as information gathered by BNamericas reporters and analysts and are subject to change.

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Key Specs

Full Name
Spence Growth Option
Project Type
Copper, Molybdenum, Open pit mining
Development Phase
Awaiting construction decision
Project Status
Project Capacity
835,000  t/y (tons per year)  Copper
7,500  t/y (tons per year)  Molybdenum
 Open pit mining
US$ 2.5bn

The project is located in the Sierra Gorda district in Antofagasta Region (II), approximately 153km to the northeast of Antofagasta.

* The map coordinates represent the approximate latitude and longitude, and not the exact location of the project.

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Owner / operator
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General Manager
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Corporate Manager
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