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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