Figure 2
Backscattered electron images obtained at the SEM at 25 kV and 1 nA of the same sample as Fig. 1. (a) Fragment where the stratigraphy is shown. (1: alteration layer; 2, 3 and 4: green chromatic layers; 5: preparation layer). (b) The particles belonging to the green chromatic layer are shown. The lighter particles, <3 µm, have Pb and Sn and the darker particles have Cu and some Cl. |