Practical interpretation of mineral resource and ore reserve classification guidelines / Практическое применение руководства по классификации минеральных ресурсов и рудных запасов

The Australasian Code for reporting of Mineral Resources and Ore Reserves (JORC Code) was updated in 1999 (JORC 1999). This paper has been written as an update of Snowden (1996 and 1997) to recognise the large amount of experience with the use of the JORC Code gained by industry over the last four years, and describes the latest developments in technology and toolkits for risk classification.
The JORC Code provides a system for classification of tonnage and grade estimates according to geological confidence and technical/economic considerations. The Code describes the criteria which apply to the reporting of exploration results, Mineral Resources, Ore Reserves, Coal Resources and Reserves and mineralised stope fill, stockpiles, remnants, pillars, low grade mineralisation and tailings.
Stephenson (1995) summarises the history of development of the JORC Code by the Joint Ore Reserves Committee, comprising members of the Australasian Institute of Mining and Metallurgy (AusIMM), the Minerals Council of Australia (MCA) and the Australian Institute of Geoscientists (AIG). The committee also has representation from the Australian Stock Exchange (ASX), Securities Institute of Australia (SIA) and Mineral Industry Consultants Association (MICA).