“…18,[23][24][25][26] Nowadays, mLIBS imaging (i.e., with crater size and shot-toshot distance in the order of a few micrometres) provides access to the distribution of trace, minor and major elements within different mineralogical phases of large samples of several cm 2 . Contrary to mXRF or EMPA, LIBS is particularly appropriate for the analysis of light elements such as H, Li, Be, B, and C; halogens; 27,28 as well as rst-row transition elements of the periodic table. They exhibit, in addition, a simpler optical response (a few emission lines), while sub-ppm sensitivity can be reached for some of these elements.…”