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Open AccessArticle

Geostatistical Estimation of Multi-Domain Deposits with Transitional Boundaries: A Sensitivity Study for the Sechahun Iron Mine

1
Department of Civil, Chemical, Environmental and Material Engineering, University of Bologna, 40126 Bologna, Italy
2
Department of Chemical, Material and Environmental Engineering, Sapienza University of Rome, 00185 Roma, Italy
3
Mines ParisTech, 75006 Paris, France
*
Author to whom correspondence should be addressed.
Minerals 2019, 9(2), 115; https://doi.org/10.3390/min9020115
Received: 14 January 2019 / Revised: 8 February 2019 / Accepted: 12 February 2019 / Published: 16 February 2019
(This article belongs to the Section Mineral Deposits)
In mineral resource estimation, identification of the geological domains to be used for modeling, and the type of boundaries dividing them, is a major concern. Generally, the variables within a domain are estimated with an assumption of the hard boundaries (sharp contact). However, in many cases, the geologic structures that generate a deposit are transitional (overlapping of several geologic domains). Consequently, boundary identification of the geological domains is essential for an accurate estimate of resources. This paper considers a real application to examine whether the addition of geologic information benefits grade estimation in the presence of transitional boundaries. Results proved that the accuracy of the grade estimation can be improved by adding geological information and there is a significant sensitivity in grade estimation results in the existence of transitional boundaries. View Full-Text
Keywords: transitional boundaries; ordinary kriging; cokriging; partial grade; block modeling transitional boundaries; ordinary kriging; cokriging; partial grade; block modeling
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Kasmaee, S.; Raspa, G.; de Fouquet, C.; Tinti, F.; Bonduà, S.; Bruno, R. Geostatistical Estimation of Multi-Domain Deposits with Transitional Boundaries: A Sensitivity Study for the Sechahun Iron Mine. Minerals 2019, 9, 115.

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