Figure F124. A. Troctolite with coronitic texture (interval 304-U1309D-13R-3, 0–10 cm) (field of view [FOV] = 6 cm). Dark chlorite rims around plagioclase and dark to light green spots of tremolite/actinolite + chlorite after olivine can be seen. B. Serpentine “ladder” veins in fresh troctolite (interval 304-U1309D-70R-3, 80–88 cm). Black serpentine veins have white “bridges” of prehnite/hydrogarnet replacing plagioclase. C. Radial cracks around chlorite-actinolite coronas after olivine in troctolite (Sample 304-U1309D-12R-1, 65–67 cm) (plane-polarized light; FOV = 9.6 mm). D. Same as C, inverted and contrast-enhanced to emphasize veins of chlorite and actinolite, as well as turbid alteration zones in plagioclase (plane-polarized light). E. Complex corona around olivine, showing a talc zone between the tremolite zone and olivine (Sample 304-U1309D-26R-2, 12–14 cm) (cross-polarized light; FOV = 4.8 mm). Olivine has been converted to serpentine and carbonate. Box = location of F. F. Detail of E (cross-polarized light; FOV = 2.4 mm). Carb = carbonate, Serp = serpentine, Trem = tremolite.
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