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Mineral Resource Estimation

Recent Advances In Mineral Resource Modelling
SRK Global

In this dynamic and challenging time for the mining industry, SRK Consulting’s mineral resource consultants continue to stay up to date.

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Leapfrog Geo Developments And The Future For 3D Modelling
Peter Gleeson

Implicit Software Modelling technologies are designed to improve 3D geological modelling for exploration and resource definition.

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Rigorous Geological Input In Gold Mineralisation Models
Jean-Francois Ravenelle

Despite the intention to include geological controls during the wireframing phase of the mineral resource estimation process, modelling methodology is sometimes reduced to connecting grade data along trends judged to be geologically valid.

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Dilution: GEO’s Get Some “Skin” In The Game
Jay Pennington

Typically, conversions from mineral resources to mineral reserves are handled by mining engineers, rather than geologists.

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Vein Modelling Using Leapfrog, Leads Into Drillhole Planning
Ben Parsons

Historically the modelling of narrow vein deposits has relied on classical two dimensional methods to estimate tonnage, grade and thickness in narrow vein deposits.

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Cut-Off Grades For Mineral Resource Reporting: Going The Extra Rare Earth Mile
Martin Pittuck

Resource Geologists are geologists who can value the basic underlying economic attractiveness of a mineral deposit.

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Multi-Element Ratios To Define Estimation Domains: Kvanefjeld
Robin Simpson

Kvanefjeld is the flagship orebody of Greenland Minerals and Energy Ltd’s (GMEL) Northern Ilimaussaq project.

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Grade Capping For Mineral Resource Estimates
Marek Nowak

High grade drill intersects are often a welcome occurrence for a mining company, its shareholders and/or potential investors.

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Estimating Bulk Density For Mineral Resource Reporting
Gilles Arseneau

Mineral resources are reported in tonnage and grades.

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MultiGaussian Kriging For Grade Domaining – An Uncertainty Based Approach
Oy Leuangthong

Grade domains are often considered, following the modelling of geologic domains, to further control the distribution of grades during resource estimation.

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Ordinary Kriging Vs Localised Uniform Conditioning
Ernesto Jaramillo

Linear Estimators, such as Ordinary Kriging, can produce smoothed assessments in the results of your resource estimation.

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Update On Geostatistical Advances
Daniel Guibal

Most recent developments in resource estimation have taken place in the following fields:

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Selectivity – Local Vs Global
Danny Kentwell

A fundamental concept of geostatistics that is often overlooked or misunderstood in resource estimation during the early project stage is the relationship between the global grade tonnage curve and the quality of the local block by block estimate.

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Estimating Metallurgical Variability: A Case Study
Sébastien B. Bernier

After discovering a mineral deposit, delineating the drilling, and developing a geological framework, the next step is usually estimating metal content by quantifying the grade and tonnage of the mineral occurrence.

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Block Variance Validation
Yonggang Wu

Generally speaking, grade interpolation can be validated by VMS (visual assessment, mean assessment, swath plot validation) and block variance validation.

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Mapping The Indian Resource Classification System With The CRIRSCO Template
Shameek Chattopadhyay

In early 2015, India introduced a set of new mining rules, using the terminologies defined in the UNFC 1997 guideline and the CRIRSCO Template.

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External Mineral Resource Audits
Mark Campodonic

At some point during your professional career as a Resource Geologist, you can expect that the Mineral Resource estimates (MRE’s) you have produced in accordance with international reporting codes will be subject to a technical audit by an external organisation, most likely by a Competent/Qualified Person from a third-party consultancy.

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Application Of The JORC Code To A Complex Mozambique Coal Deposit
Anna Fardell

Classifying coal deposits in recently explored basins to internationally recognised reporting codes requires close attention to data quality and a comprehensive understanding of the geology.

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Block Modelling In The CIS And Alignment With The GKZ
Liubov Egorova

The CIS countries inherited the resource estimate code from the Soviet era that was originally created and is still updated by the Geological Commission for Reserves or GKZ.

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Satisfying The “Reasonable Prospects For Economic Extraction” Requirement
Glen Cole

International professional organisations in Australia, Canada, South Africa, USA, UK, Ireland, and many countries in Europe have adopted comparable codes, guidelines, and standards for mineral resource reporting.

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Reasonable Prospects For Eventual Economic Extraction (RPEEE)
Roger Dixon

The Committee for Mineral Reserve International Reporting Standards (CRIRSCO) has consolidated reporting codes and standards to produce a consistent definition of a Mineral Resource.

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