Scientific Investigations Report 2012-5164 Global Exploration and Production Capacity for Platinum-Group Metals From 1995 Through 2015 By David R. WIlburn _______________________________________ Version history _______________________________________ Version 1.0 Posted November 26, 2012 Version 1.1 Posted December 14, 2012 On p. 17, first two full paragraphs are revised to read as follows: Wesizwe Platinum Limited is a junior South African PGM company managing the exploration and development activities of the Ledig Frischgewaagd project on the Western Bushveld. The company secured financing for development at the end of 2010, was planning initial production in 2014, and anticipated achieving a capacity of 10,700 kg/yr of recoverable PGMs by 2019 (Wesizwe Platinum Limited, 2010). The company is involved in a joint venture with Platinum Metals Group Limited to explore and develop the Elandsfontein PTM (WBJV) project on the Western Bushveld by 2013. This project will have an estimated capacity of 8,300 kg/yr of recoverable PGMs. Platinum Australia Limited is a junior PGM company, which opened the Smokey Hills mine on the Eastern Bushveld in 2009. The company expected the mine to reach its full capacity of 2,900 kg/yr of recoverable PGMs by 2012. The company is involved in a joint venture to explore the Rooderand project on the Western Bushveld, an early-stage exploration project that is not expected to commence production before 2015 (Platinum Australia Limited, 2010).