In Micon’s Opinion…

In all instances of drilling, maximum recovery of a representative sample is the objective. The general notion is that the bigger the core size, the better/more representative the sample. As a result, samples collected from smaller drill core are often considered...

Despite progress being made by professional organisations towards the worldwide standardization of Mineral Resource Standards and Definitions, Micon continues to encounter poorly classified mineral resource estimates. Such classifications often resemble a ‘Spotted...

Can use be made of old or historic assay data in a current mineral resource estimate? The amount of data involved may be substantial and duplicating it could cost hundreds of thousands or even millions of dollars. Clients usually wants to use as much of it as possible. What can be done to complete best practices data verification and justify its use?

When is something “economically mineable” for the purpose of reporting a mineral reserve? Beyond requiring the use of certain reporting codes, NI 43-101 does not specify a methodology for the estimation of mineral resources or reserves.

The modern mining history of every country is different but, as a result of globalization, mining and exploration companies operate in a global capital and commodity market. Public companies from northern Russia to southern in Chile have the obligation to regularly...

Genetic models are rarely mentioned in the estimation of mineral resources and yet they are key to getting things right. The ability to conceive/perceive and apply the correct genetic model early in the exploration stage is crucial not only to the discovery of the...

Geostatistics is more than just a black-box or button-pushing exercise. It is a process involving a suitable collection of data and geological information, a detailed analysis of this data, an understanding of suitable methods for estimation and their inherent assumptions, and a systematic and comprehensive validation of the output model. Tools such as software packages are not magic wands that mysteriously produce models that fit the characteristics of the natural phenomenon. A sensible geostatistical estimate takes time, understanding, experience and skill to produce.

The mining consultant, or Independent Engineer (‘IE’) can provide the expertise needed to assess the full range of technical risks and opportunities associated with mining projects. on behalf of the potential investor.

The purpose of an NI 43-101 Technical Report, as stated in the Form 43-101F1 Instructions, is “to provide a summary of material scientific and technical information concerning mineral exploration, development, and production activities on a mineral property that is...

Under the CIM Standards on Mineral Resources and Reserves – Definitions and Guidelines, a mineral resource must be in “such form, grade or quality and quantity that there are reasonable prospects for eventual economic extraction”. The implications of this for the selection of a cut-off grade are discussed in this article by Micon’s V.P. Geology, Terry Hennessey.