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. 2014 Dec 3;5:5451. doi: 10.1038/ncomms6451

Figure 2. Back-scattered electron (BSE) and temperature images of CR2 chondrite GRA 06100.

Figure 2

(a) BSE image showing chondrules (CHO), mesostasis, opaque assemblages (OA) and matrix (Mtx). (b) Temperature map of the same area. Scale bar, 0.5 mm. Chondrule olivines (gray-scale regions) show no evidence of heating or shock. Temperatures were estimated based on the crystallographic transitions of aliettite (423, 493, 878 and 1,178 K)24; presence of near-end member ankerite (T>1,100 K)25; thermal decomposition of pentlandite (T>873 K)27; scorzalite–lazulite solid solution (T>758 K)26.