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Figure F132. A. Chromite-bearing tremolite-talc-chlorite schist of partly ultramafic origin (Sample 304-U1309D-1R-3, 0–4 cm) (field of view [FOV] = 5.6 cm). Cross cutting veins are tremolite; dark patches are chlorite rich and may be of mafic (plagioclase) origin. Photo is oriented in the core reference frame. B. Tremolite-talc-chlorite schist (Sample 304-U1309D-1R-3, 0–4 cm) (plane-polarized light). The upper part contains patches of talc, overgrown by random tremolite grains, together with chlorite-rich patches. In the center is a tremolite shear zone, and the lower part of the slide is a breccia with a schistose matrix made of materials similar to those in the upper part. Photo is oriented in the core reference frame (FOV = 2.7 cm). C. Detail of B. Extended chromite grains in tremolite-talc-chlorite schist (FOV = 4.8 mm). The fracturing is clearly contemporary with growth of tremolite. D. Metagabbro sample immediately beneath the tremolite-talc-chlorite schist in A (interval 304-U1309D-1R-3, 10–18 cm) (FOV = 6 cm). One edge of the sample is a pure tremolite schist. E. Chlorite (Chl) replacing plagioclase and brown hornblende (Brown Hbl) replacing pyroxene in tremolite-chlorite schist (Sample 304-U1309D-1R-3, 9–11 cm) (cross-polarized light; FOV = 1.2 mm). Note that plagioclase is completely replaced in this sample.

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