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This page is under review. For the latest information, please refer to our Integrated Annual Report 2018, released on 29 March 2019.

On 29 June 2018, Sibanye-Stillwater advised that it has entered into an arrangement agreement with Regulus Resources Inc. and a newly formed subsidiary of Regulus, Aldebaran Resources Inc., creating a strategic partnership in order to unlock value at its Altar copper-gold project in San Juan Province, Argentina. For more information, visit the transaction page:

Altar project strategic exploration partnership

Altar is a copper-gold property in San Juan province, Argentina. It is located in the Andes Mountains, approximately 10km from the Argentina-Chile border, and approximately 180km west of the city of San Juan.

In October 2011, Stillwater acquired Peregrine Metals Limited, a Canadian exploration company, whose principal asset was the Altar project. The property consists of eight wholly-owned mining concessions and five optioned mining concessions. Seven of these mining concessions are subject to production royalties, including a 1% net smelter royalty, and four other concessions are subject to a 2% net smelter royalty.

Altar, an exploration-stage project, is primarily a copper-gold porphyry deposit with potential for discrete peripheral gold system targets. The Altar deposit currently exhibits open mineralisation in most directions. During 2016, 4,931m were drilled on eight holes plus one hole extension. The 2016 drilling resulted in the discovery of a new copper-gold porphyry stock southeast of the Quebrada de la Mina (QDM) gold Mineral Resource.

During the eight months ended 31 December 2017, US$1.7 million was spent on the project to advance the following: A total of 5,631m of HQ size diamond drilling was performed between January and April 2017 to further test the 2016 discovery of the Quebrada de la Mina QDM-radio-porphyry copper-gold mineralisation. Drilling further defined the QDM-radio-porphyry to 1,000m depth, open in all directions. In addition to diamond drilling, surface prospecting and collection of environmental baseline data continued to maintain the project status.

Altar has 2,614 million tonnes of Mineral Resource at 0.31% copper and 0.07g/t gold (17.9 billion lbs of copper and 6.3Moz of gold) as at 31 December 2017.

The budget for 2018 is US$6.1million, earmarked to drill 6,000m on QDM-radio-porphyry, Altar-East and Altar-Central plus continue with surface geophysics, talus fine geochemistry, and environmental baseline data collection during the year. Drilling in 2018 is intended to test depth extension of all three areas by an additional 400-500m.