Figure F177. A. steeply dipping pale green vein with talc fibers in coarse-grained gabbro (Sample 305-U1309D-95R-2, 119–133 cm). Shallow-dipping cracks with white infills emanate from the pale green vein. B. Same as A; view of vein surface talc fibers plunging 20° along the pale green vein. C. Two steeply dipping pale green veins with horizontal talc fibers, indicating strike-slip movement, and thick alteration halo in dunite (Sample 305-U1309D-136R-1, 70–90 cm). D. Subhorizontal pale green vein with subhorizontal talc fibers crosscutting earlier steeply dipping magmatic vein in olivine-rich troctolite (Sample 305-U1309D-136R-2, 1–18 cm). E. Steeply dipping but irregular pale green vein with subhorizontal talc fibers in medium-grained gabbro (Sample 305-U1309D-145R-2, 100–116 cm). F. Steeply dipping pale green vein with talc fibers plunging 60° and alteration halo in fine-grained gabbro (Sample 305-U1309D-149R-2, 42–54 cm).
Previous | Close | Next | Top of page