Trace-element imaging at macroscopic scale in a Belgian sphalerite-galena ore using Laser-Induced Breakdown Spectroscopy (LIBS)

Laser-Induced Breakdown Spectroscopy (LIBS) is a fast in-situ analytical technique based on spectroscopic analysis of atomic emission in laser-induced plasmas. Geochemical mapping at macroscopic scale using LIBS was applied to a decimetric Zn-Pb ore sample from east Belgium, which consists of alternating sphalerite and galena bands. A range of elements was detected with no or minimal spectral correction, including elements of interest for beneficiation such as Ge, Ag and Ga (although the detection of gallium could not be confirmed), and remediation, especially As and Tl. The comparison between LIBS and Energy Dispersive Spectroscopy (EDS) analyses showed that LIBS intensities reliably relate to elemental concentration although differences in spot size and detection limits exist between both techniques. The elemental images of minor and trace elements (Fe, Cu, Ag, Cd, Sb, As, Tl, Ge, Ni and Ba) obtained with LIBS revealed with great detail the compositional heterogeneity of the ore, including growth zones that were not visible on the specimen. In addition, each mineral generation has a distinct trace-element composition, reflecting a geochemical sequence whose potential metallogenic significance at the district scale should be addressed in further work. Although qualitative and preliminary, the obtained LIBS dataset already produced a wealth of information that allowed to initiate discussion on some genetical and crystallochemical aspects. Above all, LIBS appears as a powerful tool for screening geochemically large samples for the selection of zones of particular interest for further analysis.LIBS Scree

Comments on the paper by Préat et al. (1983): caractère épigénétique-étranger des gîtes filoniens Pb-Zn (Ba-F) du Bord sud du Synclinorium de Dinant (Belgique)

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Les formations lithostratigraphiques du Bocq et du Samson et leur intérêt dans l'industrie extractive

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Delmer André

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In memoriam Armand François

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Etude de la minéralisation et de la genèse du gîte stratiforme de Ravandje (Iran central) -- Mémoire de fin d'étude d'ingénieur géologue

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Guide de lecture des cartes géologiques de Wallonie à 1/25000

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Présence de Gersdorfitte et de nickeline dans le filon plombo-zincifère de Bleiberg

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The sedimentary structures of barite: examples from the Chaudfontaine ore deposit, Belgium

The ore deposit is hosted in Frasnian shale and carbonate formations. Thirteen sedimentary structures involving barite crystals are described and discussed. Many of these structures appear to have developed under gravity control. The role of mechanical and chemical ore apposition processes are detailed in each case. High-energy currents and unstable sediment caused previously deposited crystals to be reworked. Morphological similarities were found between Chaudfontaine barite and gypsum from evaporites. -from AuthorSCOPUS: ar.jFLWNAinfo:eu-repo/semantics/publishe

Feuille Amberloup - Flamierge 60/5-6

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