Diamond deposits have long been recognised as requiring specific attention with respect to Mineral Resource estimation practices. Nowhere is this more apparent than in the estimation of Mineral Resources on alluvial and marine deposits. The 2016 SAMREC Code has acknowledged these issues, as well as those more often associated with smaller deposits.
The SAMREC Code has a detailed diamond-specific section comprising Clauses 60-72; a diamond-specific section to Table 1 (Section 11). In addition, a Guideline Document has been prepared which provides the methodologies and definitions of the relevant terms that should be considered in the preparation of reports on Diamond Exploration Targets, Diamond Resources and/or Diamond Reserves. It also provides a guide table of contents to assist with the compilation of Competent Persons Reports (CPR’s).
In parallel with the Code revision has been a revision of the SANS coal standard (SANS 10320: South African Guide to the Systematic Evaluation of Coal Resources and Coal Reserves). It must be noted that this is a standard under the South African Bureau of Standards (SABS) and covers a slightly different ambit, which includes national reporting of coal resources and reserves. Nonetheless it includes various valuable aspects that are relevant to the declaration of Coal Resources and Reserves. The SAMREC Code therefore insists on the SANS 10320 being consulted when making a coal declaration or for Public Reporting. This has allowed the Coal section of the Code to be revised and indeed abbreviated.
It must be noted that some aspects of coal reporting where not fully consistent with the SAMREC Code. For example, the requirement of a Feasibility Study to be completed in order to declare a Proved Coal Reserve. The classification of Proved and Probable Coal Reserves has been modified to reflect a minimum requirement of a Prefeasibility Study or Life of Plan which now aligns this definition with international requirements. An additional change to coal reporting was the removal of reporting of in-situ coal reserves in the 2016 SAMREC Code. It should be noted that this later concept is not lost and is still part of the SANS Standard – but no longer included in the Code.