Table T3. Example vein log, Expedition 312.
| Interval (cm) | Width (mm) | Vertical? | Vein nets and breccias |
Secondary minerals (%) | XRD results | Comments | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Expedition | Hole | Core | Section | Piece | Top | Bottom | Saponite | Celadonite | CO3 | Sulfide | FeOx | SiO2 | Quartz | Zeolite | Chl/Sm | Chlorite | Actinolite | Prehnite | Epidote | Anhydrite | Hornblende | Magnetite | Secondary plagioclase | Alteration halos | |||||||
| Type (vein or BR) |
Secondary minerals (%) | Width (mm) | Type | ||||||||||||||||||||||||||||
| 312 | 1256D | 172 | 1 | 2 | 5 | 6 | 0.2 | 100 | |||||||||||||||||||||||
| 312 | 1256D | 172 | 1 | 2 | 5 | 7 | 0.5 | V | 1 | 99 | 1.0 | Lt gy | Py | ||||||||||||||||||
| 312 | 1256D | 172 | 1 | 3 | 8 | 10 | 0.2 | V | 1 | 99 | Py | ||||||||||||||||||||
| 312 | 1256D | 172 | 1 | 3 | 8 | 10 | 0.1 | V | 1 | 99 | Py | ||||||||||||||||||||
| 312 | 1256D | 172 | 1 | 4 | 10 | 12 | 0.1 | V | 100 | ||||||||||||||||||||||
| 312 | 1256D | 172 | 1 | 5 | 13 | 16 | 0.2 | V | 5 | 95 | Py | ||||||||||||||||||||
| 312 | 1256D | 172 | 1 | 5 | 14 | 15 | 0.2 | V | 2 | 98 | Py | ||||||||||||||||||||
| 312 | 1256D | 172 | 1 | 6 | 17 | 21 | 0.1 | 1 | 99 | Py | |||||||||||||||||||||
| 312 | 1256D | 172 | 1 | 7 | 22 | 25 | 0.2 | 1 | 99 | 2.0 | Py; compos | ||||||||||||||||||||
| 312 | 1256D | 173 | 1 | 1 | 0 | 12 | 0.5 | 100 | 1.5 | Dk gn | |||||||||||||||||||||
Notes: FeOx = oxyhydroxides, SiO2 = amorphous silica, Chl/Sm = chlorite/smectite. XRD = X-ray diffraction. Py = pyrite, cp = chalcopyrite, sp = sphalerite, qz = quartz, chl = chlorite, laum = laumontite, cal = calcite, lt = light, dk = dark, gy = gray, gr = green, compos = composite. For the complete vein logs, see 309VEIN.XLS and 312VEIN.XLS in “Supplementary material.”
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