Figure F106. Anhydrite-pyrite vein (at 84 cm) with a wide cyclic siliceous alteration halo. The different shades of gray are due to varying proportions of quartz and clay minerals (interval 193-1188F-2Z-1, 80-91 cm [Piece 2G]; 222.30 mbsf).

Figure F106. Anhydrite-pyrite vein (at 84 cm) with a wide cyclic siliceous alteration halo. The different shades of gray are due to varying proportions of quartz and clay minerals (interval 193-1188F-2Z-1, 80-91 cm [Piece 2G]; 222.30 mbsf).