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Minerals 2018, 8(5), 186; https://doi.org/10.3390/min8050186

Geometallurgical Study of a Gravity Recoverable Gold Orebody

1
Minerals Engineering Research Group, Camborne School of Mines, University of Exeter, Penryn, Cornwall TR10 9FE, UK
2
Department of Mining and Metallurgical Engineering, Western Australian School of Mines, Curtin University, Bentley, WA 6102, Australia
3
Department of Mineral Resources Engineering, School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
*
Author to whom correspondence should be addressed.
Received: 1 April 2018 / Revised: 23 April 2018 / Accepted: 26 April 2018 / Published: 29 April 2018
(This article belongs to the Special Issue Geometallurgy)
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Abstract

Sheeted vein gold deposits are often characterised by multiple sub-parallel veins and free-milling coarse gold. Inherent mineralisation heterogeneity results in grade and process parameter variability, which increases project risk if not quantified. Measured grade variability is often exacerbated by poorly designed sampling and testwork protocols. Protocols that are optimised within the framework of the Theory of Sampling (TOS) to suit the ore type, together with quality assurance/quality control systems, will reduce variability and provide fit-for-purpose results. Geometallurgy can be broadly split into two key approaches: strategic and tactical (or operational). The strategic approach focuses on the whole orebody and long-term life-of-mine view, whereas tactical geometallurgy relates to a more short- to medium-term view during mining. The geometallurgical approach requires spatially distributed samples within a deposit to support variability modelling. Diverse attributes from core logging, mineralogical/textural determination and small-scale tests are used to measure variability. This contribution presents a case study that emphasises an early-stage strategic geometallurgical programme applied to a gravity recoverable gold (GRG) dominated deposit. It exemplifies how data can be acquired from a well-designed and planned programme to support resource estimation, a pre-feasibility study, trial mining and fast-track to production. A tactical geometallurgical programme is embedded into the mine operation. View Full-Text
Keywords: sheeted vein mineralisation; geometallurgy; gravity recoverable gold; sampling protocol optimisation; bulk sampling; trial mining sheeted vein mineralisation; geometallurgy; gravity recoverable gold; sampling protocol optimisation; bulk sampling; trial mining
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Dominy, S.C.; O’Connor, L.; Glass, H.J.; Xie, Y. Geometallurgical Study of a Gravity Recoverable Gold Orebody. Minerals 2018, 8, 186.

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