Reporting industrial minerals and indicated resources

• Autores: Industrial Minerals
• Localización: Industrial Minerals, ISSN 0019-8544, Nº. 585, 2016 (Ejemplar dedicado a: Julio/Agosto)
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • For example, inferred resources have a low level of certainty, and are defined in the code as being of sufficient certainty only to imply, but not verify, geological or grade continuity, and are not suitable for conversion to ore reserves. Only indicated and measured mineral resources can be converted to probable and proved ore reserves by the application of appropriate modifying factors. This conversion process is via studies of appropriate levels, commensurate with project maturity. These levels of study are defined in the JORC Code (Clauses 37-40), as scoping, prefeasibility and feasibility studies.

    An exploration company may wish to publish exploration results, for which there are very clear guidelines in the JORC Code Clause 19: "Public reports of exploration results must contain sufficient information to allow a considered and balanced judgement of their significance." The clause adds that results must not unreasonably imply that potentially economic mineralisation has been discovered.

    Clause 24 deals with mineral resource categories, which depend on "quantity, distribution and quality of data available and the level of confidence that attaches to those data". Indicated resources are "estimated with sufficient confidence to allow the application of modifying factors in sufficient detail to support mine planning and evaluation of the economic viability of the deposit", the clause outlines.