An enhanced co-simulation technique for resource modelling using grade domaining: a case study from an iron ore deposit
Iliyas N. Madani N.
2021Taylor and Francis Ltd.
Applied Earth Science: Transactions of the Institute of Mining and Metallurgy
2021#130Issue 281 - 106 pp.
For resource estimation, domains are interpreted in a deposit to define homogenous areas for grade estimation. The conventional approach is to interpret the domains and then to separately model the distribution of the grade (i.e., partial grades) within each domain. The problem is that independent modeling of partial grades ignores the cross-dependency that exists between the partial grades within the defined domains. In this study, an alternative is proposed to first model the grade domains using a stochastic approach and then to model the partial grades within each domain using a co-simulation algorithm that incorporates their cross-correlation structures. The proposed enhanced co-simulation methodology has been applied at an iron deposit and a single grade threshold. This case study shows that the enhanced co-simulation methodology is capable of reproducing the global statistics and spatial continuity characteristics of the partial grades and results in improved domaining, grade estimation and definition of ore.
Grade domaining , heterotopic simple co-kriging , turning bands co-simulation , variogram modelling
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School of Mining and Geosciences, Nazarbayev University, Nur-Sultan city, Kazakhstan
School of Mining and Geosciences
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Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026