Extended Data Fig. 7: Halite and sylvite grains in Bennu sample OREX-501070-0.
From: An evaporite sequence from ancient brine recorded in Bennu samples
(a) SE image of halite- and sylvite-bearing particle subjected to FIB milling. (b) BSE image of the particle in (a) after FIB-milling the top 10 µm, revealing Ca-Mg-Fe-Ti-Al–bearing clinopyroxene, plagioclase, halite, and sylvite in a Na- and C-rich matrix. (c) Plot of F versus Na# of the halite-sylvite fragments. (d) BSE image zoomed in on the halite and sylvite. (e) SE image collected after 8 months, showing voids where halite-sylvite grains were once located.
