minerals

The USA's dependence on imported sources of strategic minerals has grown substantially since the second world war, while its ability to protect the sealanes critical to foreign supplies has deteriorated. Domestic production has been severely hampered by a lack of access to mining on public lands, and by excessive environmental regulations. No major purchases have been made for the strategic stockpile in 20 years. Concern has been growing in Western Europe and in Japan about secure supplies of strategic minerals. Being even more dependent on foreign sources of supply than the USA, some of these countries have recently initiated their own strategic stockpilling programmes. The USSR, long an important exporter of metals, appears to have changed its mineral trade policy, and has sharply reduced exports while entering the market as an importer of a number of key metals. These developments foreshadow growing competition for world supplies of strategic minerals.

Published in: Resources Policy, Volume 7, Issue 1, March 1981, Pages 4-13
Available from: ScienceDirect

The factors which influence the size and value of mineral reserves are discussed and an example is given of a more rigorous system for measuring supplies of non-renewable resources.

The extent to which reserves and resources of minerals can be used as leading indicators of future mineral production is examined and examples of the dangers of over-reliance on this factor are described.

Key aspects, such as confidence limits, differences in the economic exploitability, the dynamic nature of reserves, and their variability in grade, are examined in some detail using the South African coal industry as an example.

Published in: Resources Policy, Volume 1, Issue 6, December 1975, Pages 343-356
Available from: ScienceDirect