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Can I Use Historic Assay Data in My Resource Estimate?

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 a Reserve a Reserve?

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.

Cut-off Grades for Mineral Resource Reporting

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.

Classification of Mineral Resource Estimates

In the first of a series of articles on best practice DOs and DON’Ts, Bill Lewis, senior geologist with Micon in Toronto, highlights the need to tread carefully when classifying Mineral Resources. The classification of Mineral Resources is an important factor in the analysis of risk on advanced mining projects, and implementing best practices in this area can improve the probability of a successful mine development.

Due Diligence Reports – an IE’s Perspective

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.

Specialty Commodity Sector

In the specialty commodity sector, it is the geology and mineralogy of the raw material source that ultimately provide the consumer with a secure, consistent supply of a processed mineral or metal product meeting the required specifications. M.Plan International – Micon’s joint venture with Anzaplan GmbH – offers a fully integrated suite of services to the specialty commodity sector for project development studies and due diligence assessment.

Continuity in Mineral Resource Estimation

In the second of a series of articles discussing best practice, we focus on the importance of continuity within a mineral resource. The first article covered the classification of resources. Continuity lies at the heart of that discussion and, from Micon’s point of view, is one of the most important but one of the most frequently overlooked issues when conducting mineral resource estimates.

M.Plan International Limited

Dorfner ANZAPLAN GmbH and MICON International Limited are pleased to announce the formation of M.PLAN International Limited, which will provide a unique and fully-integrated suite of consulting services explicitly focused on the specialty commodity sector.