Figure 13. Sketches of alteration halos in two samples from Hole 1027C and secondary mineral distribution within the halos. A. Sequential vesicle linings in the four recognized zones. B. Geometric relationship between halos and veins. C. Temporal and spatial distribution of secondary minerals across halos zonations. RZ = reddish brown zone; GZ = greenish red to green zone; TZ = greenish to light gray transitional zone; V1 and V2 = vein types as described in the text.

Figure 13. Sketches of alteration halos in two samples from Hole 1027C and secondary mineral distribution within the halos. A. Sequential vesicle linings in the four recognized zones. B. Geometric relationship between halos and veins. C. Temporal and spatial distribution of secondary minerals across halos zonations. RZ = reddish brown zone; GZ = greenish red to green zone; TZ = greenish to light gray transitional zone; V1 and V2 = vein types as described in the text.