In order to evaluate the instrumental parameters for the combined on-line-on-mine-real-time expert system SOLSA (http://www.solsa-mining.eu), portable and laboratory analyses were carried out on coarse granite, sandstone, serpentinized harzburgite and siliceous breccia. Each sample was studied at 5 different surface roughnesses (sonic or diamond drilled, cut, polished at 6 μm and 0.25 μm, sample powders). X-ray diffraction (XRD), portable Infra-Red (pIR) and X-ray-fluorescence (pXRF), and laboratory micro-Raman spectroscopy gave complementary and corroborating results. No major effect on the analyses was noted for the selected surface states. pXRF gave variable results except for the homogeneously serpentinized harzburgite, related to coarse or contrasting grain sizes or pores, small spot size (3 mm) and needs close-to-surface analyses. Portable IR (spot size 1.76 cm2) is carried out close to surfaces while Raman spectroscopy (1-2 μm) is performed at distance. Sampling strategies have to be defined for each lithology. Major challenges for a combined on-line analysis are to adapt the specificities of the techniques to (1) analyse similar surface areas (from ~2 cm2 (pIR) to < μm (Raman)), (2) smartly combine all the techniques into a single instrument, and (3) develop appropriate databases to reach a reliable “real-time” outcome results, which can be used for more precise geomodeling, and to rapidly define exploration and beneficiation parameters.

Combined mineralogy and chemistry on drill cores: challenging for on-line real-time analyses / Duée, Cedric; Orberger, Beate; Maubec, Nicolas; Laperche, Valérie; Capar, Laure; Bouruignon, Anne; Bourrat, Xavier; El Mendili, Yassine; Gascoin, Stephanie; Chateigner, Daniel; Rordriguez, Celine; Salaün, Anne; Le Guen, Monique; Mariotto, Gino; Giarola, Marco; Kumar, Arun; Daldasso, Nicola; Zanatta, Marco; Lutterotti, Luca; Borovin, Evgeny; Bortolotti, Mauro; Secchi, Maria; Montagna, Maurizio; Pillière, Henry; Lefevre, Thomas; Eijkelkamp, Fons; Nolte, Harm; Koertt, Peter; Grazulis, Saulius; Trotet, Fabien; Kadar, Mohammed; Devaux, Karen. - ELETTRONICO. - (2017). (Intervento presentato al convegno 14th SGA Biennal Meeting tenutosi a Quebec City, Canada nel 20-23 August 2017).

Combined mineralogy and chemistry on drill cores: challenging for on-line real-time analyses

Luca Lutterotti;Evgeny Borovin;Mauro Bortolotti;Maria Secchi;Maurizio Montagna;
2017-01-01

Abstract

In order to evaluate the instrumental parameters for the combined on-line-on-mine-real-time expert system SOLSA (http://www.solsa-mining.eu), portable and laboratory analyses were carried out on coarse granite, sandstone, serpentinized harzburgite and siliceous breccia. Each sample was studied at 5 different surface roughnesses (sonic or diamond drilled, cut, polished at 6 μm and 0.25 μm, sample powders). X-ray diffraction (XRD), portable Infra-Red (pIR) and X-ray-fluorescence (pXRF), and laboratory micro-Raman spectroscopy gave complementary and corroborating results. No major effect on the analyses was noted for the selected surface states. pXRF gave variable results except for the homogeneously serpentinized harzburgite, related to coarse or contrasting grain sizes or pores, small spot size (3 mm) and needs close-to-surface analyses. Portable IR (spot size 1.76 cm2) is carried out close to surfaces while Raman spectroscopy (1-2 μm) is performed at distance. Sampling strategies have to be defined for each lithology. Major challenges for a combined on-line analysis are to adapt the specificities of the techniques to (1) analyse similar surface areas (from ~2 cm2 (pIR) to < μm (Raman)), (2) smartly combine all the techniques into a single instrument, and (3) develop appropriate databases to reach a reliable “real-time” outcome results, which can be used for more precise geomodeling, and to rapidly define exploration and beneficiation parameters.
2017
Mineral Resources to Discover, Proceedings
Quebec City, Canada
Society for Geology Applied to Mineral Deposits
978-2-9816898-0-1
Duée, Cedric; Orberger, Beate; Maubec, Nicolas; Laperche, Valérie; Capar, Laure; Bouruignon, Anne; Bourrat, Xavier; El Mendili, Yassine; Gascoin, Step...espandi
Combined mineralogy and chemistry on drill cores: challenging for on-line real-time analyses / Duée, Cedric; Orberger, Beate; Maubec, Nicolas; Laperche, Valérie; Capar, Laure; Bouruignon, Anne; Bourrat, Xavier; El Mendili, Yassine; Gascoin, Stephanie; Chateigner, Daniel; Rordriguez, Celine; Salaün, Anne; Le Guen, Monique; Mariotto, Gino; Giarola, Marco; Kumar, Arun; Daldasso, Nicola; Zanatta, Marco; Lutterotti, Luca; Borovin, Evgeny; Bortolotti, Mauro; Secchi, Maria; Montagna, Maurizio; Pillière, Henry; Lefevre, Thomas; Eijkelkamp, Fons; Nolte, Harm; Koertt, Peter; Grazulis, Saulius; Trotet, Fabien; Kadar, Mohammed; Devaux, Karen. - ELETTRONICO. - (2017). (Intervento presentato al convegno 14th SGA Biennal Meeting tenutosi a Quebec City, Canada nel 20-23 August 2017).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/203466
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