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Table T4. Vein types used in the vein log.

Type Definition
Expedition 304:
1 Hornblende/Dark amphibole
2 Green/Brown/Yellow actinolite veins, often brecciated, often with secondary plagioclase halos. Includes late magmatic leucocratic dikelets where affected by actinolite/secondary plagioclase alteration
3 Late actinolite ± chlorite, albite, sphene veins
4 Late veins/Fractures with clay minerals/Hydroxides/Zeolites
5 Carbonate veins
6 Tremolite veins in peridotite
7 Talc veins, sometimes with amphibole
8 Chrysotile/Serpentine veins. 8A denotes high aspect ratio veins; 8B denotes low aspect ratio veins
9 Composite talc/Tremolite veins
10 Quartz veins
11 Other (comment)
Expedition 305:
1 Magmatic veins
2 Serpentinite veins
3 Dark green fibrous (rarely tabular) amphibole veins
4 Pale green amphibole veins, most with slip-fiber textures
5 White veins. These include carbonate, zeolite, anhydrite, prehnite, and, in the upper core, quartz veins
6 Clay rich veins. Clay (possibly saponite) commonly with calcite or zeolites (below 700 mbsf)

Note: Vein logs are found in “Core descriptions.”

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