Figure 3 | Scientific Reports

Figure 3

From: An evolutionary model and classification scheme for nephrite jade based on veining, fabric development, and the role of dissolution–precipitation

Figure 3

Type 2 crenulated nephrite (samples OU46117 (parts a-d) and OU65872 (parts e–h)),(a) Polished sample of crenulated nephrite with faint crenulation cleavage, (b) SEM backscatter image showing crenulation defined by a weak striping, which reflects the variable polish on fold hinges and limbs, (c,d) Thin section images of regularly spaced crenulations defined by alternating fold limbs and hinges in crossed-polarised light (c) and with the gypsum plate inserted (d), (e) SEM secondary-electron image of chevron or semi-chevron fold hinge regions, (f) EBSD map of same region shown in part e coloured according to the inverse pole figure (bottom right), (g) Detail of fold hinge showing sharp transition in both shape- and crystallographic-preferred orientation across chevron fold hinge, (h) Pole figure data from map in (g) highlighting the different crystallographic-preferred orientations in the two different fold limbs.

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