Fig. 3. (a) Molar compositions of individual chromite
analyses in ALH 84001 compared to representative spinels in EETA 79001 lithology A
(McSween and Jarosewich, 1983); m,c -megacrysts and cores, r - rims, g - groundmass.
(b) Close-up of the chromite compositions. Note that there is no systematic difference
between cores and rims on average. Small anhedral chromites from the crushed zones are
systematically lower in Cr compared to euhedral chromites.