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Article Dans Une Revue Journal of Analytical Atomic Spectrometry Année : 2018

Elemental imaging by laser-induced breakdown spectroscopy for the geological characterization of minerals

C. Fabre
D. Devismes
  • Fonction : Auteur
F. Pelascini
  • Fonction : Auteur
A. Lecomte
  • Fonction : Auteur
J. Cauzid

Résumé

Geological studies increasingly require highly sensitive elemental techniques able to image the distribution of elements in minerals with microscopic-scale resolution. In this paper, we present an evaluation of megapixel laser-induced breakdown spectroscopy (LIBS) imaging for the geological characterization of minerals. The study is conducted on a hydrothermal ore sample with a complex mineral structure involving five different mineral phases (galena, sphalerite, chalcopyrite, quartz and ankerite). A new methodology of data treatment adapted to a multi-phase material and megapixel LIBS imaging is also detailed. We demonstrate for the first time, to our knowledge, that LIBS-imaging technology is able to both detect and image rare earth elements (here La and Y) in carbonate as well as substituents present at the ppm-scale level in various mineral phases (i.e., cadmium in sphalerite; bismuth, silver and antimony in galena; beryllium and aluminum in quartz; and tin in chalcopyrite). These results appear extremely promising for the geological domain and should pave the way for innumerable applications.
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Dates et versions

hal-02285757 , version 1 (13-09-2019)

Identifiants

Citer

C. Fabre, D. Devismes, S. Moncayo, F. Pelascini, F. Trichard, et al.. Elemental imaging by laser-induced breakdown spectroscopy for the geological characterization of minerals. Journal of Analytical Atomic Spectrometry, 2018, 33 (8), pp.1345-1353. ⟨10.1039/c8ja00048d⟩. ⟨hal-02285757⟩
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