|
Core, section,
interval (cm) |
Depth
(mbsf) |
Unit
|
Lab
|
Description
|
XRD identification
|
|---|---|---|---|---|---|
| 193-1189A- | |||||
| 1R-1, 0–4 | 0.02 | 1 | SBD | Fresh, moderately vesicular, aphyric dacite | Plagioclase, opaline silica (augite, quartz, spinel) |
| 1R-1, 12–17 | 0.12 | 1 | HP | Fresh, moderately vesicular, aphyric dacite | Plagioclase, opaline silica/volcanic glass (augite) |
| 2R-1, 0–6 | 9.70 | 2 | HP | Moderately altered, dotted, vesicular aphyric dacite | Plagioclase (cristobalite) |
| 2R-1, 34–35 | 10.04 | 2 | SBD | Moderately to completely altered, vesicular aphyric dacite | Plagioclase, cristobalite (K-feldspar, pyrite, chlorite-bearing mixed-layer) |
| 2R-1, 77–78 | 10.47 | 2 | SBD | Moderately to completely altered, vesicular aphyric dacite | Anhydrite (cristobalite, plagioclase, pyrite, chlorite) |
| 2R-1, 113–115 | 10.83 | 4 | SBD | Hydrothermal breccia with completely altered volcanic clasts | Anhydrite, cristobalite (pyrite, chlorite-bearing mixed-layer, "illite") |
| 2R-1, 126–137 | 10.97 | 4 | HP | Hydrothermal breccia with completely altered volcanic clasts; green clast | Anhydrite, cristobalite (K-feldspar, chlorite, illite "mixed-layer clays, halite, rutile") |
| 2R-1, 126–137 | 10.97 | 4 | HP | Hydrothermal breccia with completely altered volcanic clasts; white clast | Cristobalite, K-feldspar, plagioclase (anhydrite, pyrite "chlorite?") |
| 2R-1, 126–137 | 11.00 | 4 | HP | Hydrothermal breccia with completely altered volcanic clasts; green clast | Cristobalite (K-feldspar, chlorite, illite "pyrite, halite") |
| 3R-1, 0–6 | 19.40 | 5 | HP | Highly to completely bleached, vesicular aphyric dacite | Cristobalite, plagioclase (pyrite, chlorite "K-feldspar, halite") |
| 3R-1, 6–10 | 19.46 | 5 | SBD | Highly to completely bleached, vesicular aphyric dacite | Plagioclase, cristobalite (pyrite, chlorite) |
| 3R-1, 14–17 | 19.54 | 5 | KL | Highly to completely bleached, vesicular aphyric dacite | Cristobalite, plagioclase (quartz, chlorite, chlorite-bearing mixed-layer) |
| 3R-1, 20–22 | 19.60 | 5 | SBD | Highly to completely bleached, vesicular aphyric dacite | Cristobalite, plagioclase (K-feldspar, pyrite, chlorite, illite) |
| 3R-1, 59–63 | 19.99 | 6 | SBD | Hydrothermally fractured volcaniclastic breccia | Quartz, anhydrite (pyrite, "illite") |
| 3R-1, 70–73 | 20.10 | 7 | SBD | Bleached and silicified, intensely veined dacite | Quartz (K-feldspar, pyrite, "chlorite, illite") |
| 3R-1, 84–89 | 20.24 | 7 | HP | Bleached and silicified, intensely veined dacite | Quartz (K-feldspar, pyrite) |
| 4R-1, 14–17 | 29.24 | 8 | KL | Completely altered dacite | Quartz, plagioclase (K-feldspar, chlorite, illite, "pyrite") |
| 4R-1, 17–20 | 29.27 | 8 | SBD | Completely altered dacite | Quartz (plagioclase, pyrite, chlorite, illite) |
| 4R-1, 21–24 | 29.31 | 8 | SBD | Completely altered dacite | Quartz (plagioclase, chlorite, pyrite, "illite") |
| 5R-1, 14–16 | 38.94 | 9 | SBD | Completely altered, hydrothermal breccia with flow-laminated clasts | Quartz (anhydrite, chlorite, pyrite, illite) |
| 5R-1, 33–35 | 39.1 | 9 | RA | Completely altered, hydrothermal breccia with flow-laminated clasts | Quartz, anhydrite, gypsum (chlorite, illite, "plagioclase") |
| 5R-1, 41–50 | 39.24 | 9 | HP | Completely, domainal, altered breccia with flow-laminated clasts; dominantly green | Quartz (anhydrite, chlorite, illite "plagioclase") |
| 5R-1, 41–50 | 39.24 | 9 | HP | Completely, domainal, altered breccia with flow-laminated clasts; dominantly white | Quartz, plagioclase (K-feldspar, chlorite, illite "pyrite") |
| 6R-1, 0–5 | 48.6 | 9 | RA | Completely altered, hydrothermal breccia with flow-laminated clasts | Anhydrite, gypsum (quartz, chlorite, illite) |
| 7R-1, 4–12 | 58.41 | 10 | HP | Completely altered, slightly vesicular volcanic rock | Quartz, plagioclase (K-feldspar, pyrite) |
| 7R-1, 27–28 | 58.57 | 10 | SBD | Completely altered, slightly vesicular volcanic rock | Quartz, plagioclase (pyrite, anhydrite, chlorite, illite) |
| 7R-1, 30–33 | 58.60 | 10 | KL | Completely altered, slightly vesicular volcanic rock | Quartz, K-feldspar (plagioclase, rhodochrosite, chlorite, illite) |
| 7R-1, 58–59 | 58.88 | 11 | SBD | Completely altered hydrothermal(?) breccia | Quartz (anhydrite, pyrite, "illite, chlorite") |
| 7R-1, 95–96 | 59.25 | 13 | SBD | Completely altered hydrothermal(?) breccia | Quartz (plagioclase, chlorite, "pyrite, anhydrite") |
| 8R-1, 3–10 | 68.04 | 15 | HP | Poikiloblastically silicified plagioclase-rich volcanic rock | Plagioclase, cristobalite (K-feldspar "quartz, pyrite, illite") |
| 8R-1, 31–32 | 68.31 | 15 | SBD | Poikiloblastically silicified plagioclase-rich volcanic rock | Plagioclase (quartz, pyrite, "anhydrite, chlorite") |
| 8R-1, 39–41 | 68.4 | 15 | RA | Volcanic rock with patchy silicification and prominent quartz-pyrite veining | Quartz, pyrite, plagioclase (cristobalite, chlorite, illite, mixed-layer clays) |
| 8R-1, 42–44 | 68.42 | 15 | SBD | Poikiloblastically silicified plagioclase-rich volcanic rock | Plagioclase (quartz, K-feldspar, pyrite, "anhydrite, smectite, chlorite") |
| 8R-1, 90–92 | 68.90 | 15 | SBD | Poikiloblastically silicified plagioclase-rich volcanic rock | Plagioclase, quartz (pyrite, K-feldspar, "anhydrite, chlorite, illite) |
| 8R-1, 113–114 | 69.13 | 15 | SBD | Poikiloblastically silicified plagioclase-rich volcanic rock | Quartz, plagioclase (chlorite, pyrite") |
| 9R-1, 0–5 | 77.70 | 16 | KL | Completely altered hydrothermal breccia | Quartz, plagioclase (anhydrite, chlorite, "illite, pyrite") |
| 9R-1, 16–17 | 77.86 | 16 | SBD | Completely altered hydrothermal breccia | Quartz, anhydrite (plagioclase, pyrite, "chlorite") |
| 9R-1, 17–28 | 77.91 | 16 | HP | Completely altered hydrothermal breccia | Quartz (plagioclase, anhydrite "pyrite, chlorite") |
| 9R-1, 63–67 | 78.33 | 16 | KL | Completely altered hydrothermal breccia | Anhydrite, quartz (plagioclase, gypsum, pyrite, chlorite, "illite") |
| 10R-1, 0–1 | 87.30 | 17 | SBD | Completely bleached moderately vesicular volcanic rock | Quartz (plagioclase, pyrite, "chlorite") |
| 10R-1, 38–51 | 87.69 | 19 | HP | Completely altered hydrothermal breccia; gray-green coherent part | Quartz, plagioclase, K-feldspar (pyrite) |
| 10R-1, 38–51 | 87.69 | 19 | HP | Completely altered hydrothermal breccia; clastic (siliaceous matrix and clasts) | Quartz (K-feldspar, anhydrite, pyrite, illite) |
| 10R-1, 38–51 | 87.69 | 19 | HP | Completely altered hydrothermal breccia; green-gray mass | Quartz (K-feldspar, pyrite, chlorite, illite "anhydrite, halite, gypsum") |
| 10R-1, 38–51 | 87.69 | 19 | HP | Completely altered hydrothermal breccia; gray-green mass | Quartz, plagioclase (K-feldspar, pyrite, chlorite "halite") |
| 10R-1, 50–51 | 87.80 | 19 | SBD | Completely altered hydrothermal breccia | Quartz, anhydrite (plagioclase, pyrite, "chlorite, illite") |
| 10R-1, 77–81 | 88.07 | 19 | KL | Completely altered hydrothermal breccia | Quartz, K-feldspar (plagioclase, pyrite, chlorite, "illite") |
| 10R-1, 103–115 | 88.3 | 19 | RA | Completely bleached, moderately vesicular volcanic rock | Quartz, plagioclase (pyrite, gypsum, chlorite, illite, "mixed-layer clays") |
| 11R-1, 37–38 | 97.27 | 20 | SBD | Completely silicified, massive, vesicular volcanic rock | Quartz (pyrite, illite, chlorite, "anhydrite") |
| 12R-1, 41–50 | 106.9 | 20 | RA | Completely bleached, moderately vesicular volcanic rock | Quartz, pyrite, chalcopyrite (illite, "chlorite") |
| 12R-1, 69–70 | 107.19 | 20 | SBD | Completely silicified, massive, vesicular volcanic rock | Quartz (illite, pyrite) |
| 12R-1, 83–86 | 107.33 | 20 | KL | Completely silicified, massive, vesicular volcanic rock | Quartz (chlorite, illite, pyrite) |
| 12R-1, 83–86 | 107.33 | 20 | HP | Completely silicified, massive, vesicular volcanic rock | Quartz (chlorite, illite "pyrite, halite") |
| 12R-1, 120–128 | 107.70 | 21 | HP | Mineralized pumice breccia; separate of pumice fragments | Quartz, illite ("anhydrite, pyrite") |
| 13R-1, 24–33 | 116.34 | 22 | SBD | Pervasively bleached moderately vesicular volcanic rock | Quartz (chlorite, pyrite, illite) |
| 13R-1, 51–53 | 116.61 | 23 | HP | Polymict volcaniclastic breccia; bulk rock | Quartz (albite, pyrite, chlorite "illite") |
| 13R-1, 51–53 | 116.61 | 23 | HP | Polymict volcaniclastic breccia; light green clast | Quartz, chlorite (pyrite, illite "halite") |
| 13R-1, 51–53 | 116.61 | 23 | HP | Polymict volcaniclastic breccia; light gray clast | Quartz (pyrite, chlorite, illite "halite") |
| 13R-1, 51–53 | 116.61 | 23 | SBD | Polymict volcaniclastic breccia | Quartz (plagioclase, pyrite, chlorite, "illite") |
| 13R-1, 62–71 | 116.72 | 24 | SBD | Pervasively bleached sparsely vesicular volcanic rock | Quartz (pyrite, "chlorite, illite") |
Notes: SBD = shipboard data, HP = postcruise data from H. Paulick, KL = postcruise data from K. Lackschewitz, RA = postcruise data from R. Asada. XRD = X-ray diffraction. The terms major (outside parenthesis), minor (inside parenthesis), and trace (inside both parenthesis and quotation marks) are applied to XRD analyses as explained in "Hydrothermal Alteration," in the "Explanatory Notes" chapter of Shipboard Scientific Party (2002) and do not imply quantitative abundances.