Figure F267. Veins and vein-related alteration halos throughout the sheeted dike complex. A. Anastamozing chlorite + laumontite vein (top) and chlorite + quartz + calcite vein (bottom) (Thin Section 10; Sample 312-1256D-176R-1, 8–12 cm; 1276.18 mbsf) (plane-polarized light; field of view [FOV] = 4.5 mm). B. Same as A; cross-polarized light. C. Actinolite + minor prehnite vein with clinopyroxene replaced by dusty clinopyroxene/actinolite in the flanking light gray alteration halo (Thin Section 23; Sample 312-1256D-184R-1, 10–12 cm; 1314.60 mbsf) (plane-polarized light; FOV = 0.6 mm). D. Same as C; cross-polarized light. E. Hornblende-rich amphibole + quartz vein in highly altered basaltic dike (Thin Section 37; Sample 312-1256D-197R-1, 3–6 cm; 1367.53 mbsf) (plane-polarized light; FOV = 4.5 mm). F. Same as E; cross-polarized light.
Previous | Close | Next | Top of page