|
Core, section, interval (cm)
|
Depth (mbsf)
|
Unit
|
Lab
|
Description
|
XRD identification
|
|---|---|---|---|---|---|
| 193-1188F- | |||||
| 1Z-1, 4–5 | 218.04 | 27 | SBD | Completely altered massive rock | Quartz (anhydrite, illite, "pyrite") |
| 1Z-1, 29–30 | 218.29 | 27 | SBD | Completely altered massive rock | Quartz (anhydrite, illite, pyrite) |
| 1Z-1, 87–88 | 218.87 | 27 | SBD | Completely altered massive rock | Quartz (anhydrite, illite, pyrite) |
| 1Z-2, 4–5 | 219.24 | 27 | SBD | Completely altered massive rock | Quartz (anhydrite, illite) |
| 1Z-2, 37–38 | 219.57 | 27 | SBD | Completely altered massive rock | Quartz (anhydrite, illite, "pyrite") |
| 1Z-3, 20–21 | 220.60 | 27 | SBD | Completely altered massive rock | Quartz (anhydrite, illite) |
| 1Z-3, 34–35 | 220.74 | 27 | SBD | Completely altered massive rock | Quartz (anhydrite, illite) |
| 1Z-3, 35–36 | 220.75 | 27 | SBD | Completely altered massive rock (including anhydrite vein) | Quartz (anhydrite, illite) |
| 1Z-3, 85–86 | 221.25 | 28 | SBD | Completely altered, silicified, and green clay-bearing massive rock | Quartz (chlorite, illite, anhydrite, pyrite) |
| 1Z-3, 106–108 | 221.46 | 28 | SBD | Completely altered, silicified, and green clay-bearing massive rock | Quartz (anhydrite, illite, pyrite, "chlorite") |
| 1Z-4, 63–65 | 222.2 | 28 | RA | Completely altered, silicified aphyric volcanic rock | Quartz, anhydrite, pyrite (gypsum, illite) |
| 1Z-4, 90–91 | 222.50 | 28 | SBD | Completely altered, silicified, and green clay-bearing massive rock | Quartz (anhydrite, illite, "pyrite") |
| 2Z-1, 44–45 | 221.94 | 29 | SBD | Completely altered, silicified aphyric massive rock | Quartz (anhydrite, illite, pyrite) |
| 2Z-1, 73–74 | 222.23 | 29 | SBD | Completely altered, silicified aphyric massive rock | Quartz, calcite (anhydrite, illite, "kaolinite?") |
| 3Z-1, 6–7 | 222.66 | 29 | SBD | Completely altered, silicified aphyric massive rock | Quartz (illite, anhydrite, "pyrite") |
| 3Z-2, 40–41 | 224.45 | 30 | SBD | Completely altered, brecciated, clay-rich rock | Quartz (anhydrite, illite, pyrite) |
| 3Z-2, 70–75 | 224.8 | 30 | RA | Completely altered, brecciated, volcanic rock | Quartz (pyrite, chlorite, illite, mixed-layer clays, "anhydrite") |
| 3Z-2, 144–145 | 225.49 | 30 | SBD | Completely altered, brecciated, clay-rich rock | Quartz (anhydrite, chlorite, illite) |
| 3Z-2, 150–151 | 225.55 | 30 | SBD | Completely altered, brecciated, clay-rich rock | Quartz (anhydrite, illite, pyrite) |
| 6Z-1, 20–21 | 233.30 | 30 | SBD | Completely altered, brecciated, clay-rich rock | Quartz (anhydrite, illite, chlorite, pyrite) |
| 6Z-1, 46–47 | 233.56 | 31 | HP | Highly altered, spheroidal volcanic rock; spheroid-separate | Cristobalite, plagioclase (chlorite "quartz") |
| 6Z-1, 46–47 | 233.56 | 31 | HP | Highly altered volcanic rock; groundmass separate | Quartz, cristobalite (chlorite, pyrite "anhydrite, plagioclase") |
| 6Z-1, 46–47 | 233.56 | 31 | SBD | Highly altered volcanic rock | Cristobalite, plagioclase (chlorite, pyrite) |
| 6Z-1, 77–78 | 233.87 | 32 | SBD | Completely altered, silicified massive aphyric rock | Quartz (anhydrite, illite) |
| 6Z-2, 47–48 | 234.81 | 33 | SBD | Silicified volcanic fragments embedded in soft gray clay | Quartz (illite, pyrite, anhydrite) |
| 7Z-1, 41–45 | 235.41 | 34 | SBD | Silicified massive aphyric rock | Quartz (anhydrite, illite, "pyrite") |
| 7Z-1, 104–107 | 236.04 | 35 | SBD | Silicified, plagioclase-phyric rock | Quartz (anhydrite, illite) |
| 7Z-2, 3–6 | 236.51 | 35 | SBD | Silicified, plagioclase-phyric rock | Quartz (anhydrite, illite, "pyrite") |
| 8Z-1, 16–20 | 236.40 | 36 | RA | Completely altered, silicified, massive, aphyric volcanic rock | Quartz, anhydrite, pyrite (illite, pyrophyllite) |
| 8Z-1, 26 | 236.46 | 36 | HP | Silicified massive aphyric rock; light green, amygdaloidal central part | Quartz (anhydrite, pyrite "chlorite, illite?") |
| 8Z-1, 26 | 236.46 | 36 | HP | Silicified massive aphyric rock; white, alteration halo (piece margin) | Quartz, anhydrite (paragonite, mixed-layer clays, pyrophyllite?, illite? "rutile, gypsum") |
| 8Z-1, 68–71 | 236.88 | 36 | SBD | Silicified massive aphyric rock | Quartz (anhydrite, illite) |
| 9Z-1, 9–12 | 237.80 | 37 | HP | Silicified clastic rock; white clasts | Anhydrite (quartz, illite, paragonite "gypsum, halite") |
| 9Z-1, 9–12 | 237.80 | 37 | HP | Silicified clastic rock; gray groundmass | Quartz, illite (anhydrite) |
| 9Z-1, 9–12 | 237.79 | 37 | SBD | Silicified clastic rock | Quartz (anhydrite, illite) |
| 11G–1, 53–56 | 239.43 | 38 | SBD | Silicified massive aphyric rock | Quartz (anhydrite, illite, "pyrite") |
| 11G–1, 138–141 | 240.28 | 39 | SBD | Silicified plagioclase-phyric, slightly vesicular volcanic rock | Quartz (anhydrite, pyrite, illite) |
| 13Z-1, 0–23 | 241.40 | 41 | HP | Silicified plagioclase-phyric volcanic rock; white alteration halo (margin) | Anhydrite, quartz (pyrite, illite "halite") |
| 13Z-1, 0–23 | 241.40 | 41 | HP | Silicified plagioclase-phyric volcanic rock; gray central part | Quartz (pyrite, illite "anhydrite") |
| 13Z-1, 74–78 | 242.1 | 41 | RA | Silicified, sparsely plagioclase-phyric, sparsely vesicular rock | Quartz, anhydrite, gypsum, pyrite (plagioclase, illite, pyrophyllite) |
| 13Z-1, 118–121 | 242.58 | 41 | SBD | Silicified plagioclase-phyric volcanic rock | Quartz, anhydrite, pyrite, illite) |
| 13Z-2, 51–55 | 243.27 | 41 | SBD | Silicified plagioclase-phyric volcanic rock | Quartz (anhydrite, illite, "pyrite) |
| 13Z-2, 55–70 | 243.31 | 41 | SBD | Silicified plagioclase-phyric volcanic rock | Quartz (anhydrite, pyrite, illite, "chlorite") |
| 14Z-1, 134–139 | 247.24 | 41 | SBD | Silicified plagioclase-phyric volcanic rock | Quartz (anhydrite, brittle mica?, pyrite) |
| 15Z-1, 66–69 | 251.06 | 42 | SBD | Silicified, aphyric rock | Quartz (anhydrite, brittle mica?, pyrite) |
| 15Z-1, 90–95 | 251.30 | 42 | SBD | Silicified, aphyric rock | Quartz (anhydrite, illite, brittle mica?, pyrite) |
| 16Z-1, 41–43 | 255.31 | 44 | SBD | Silicified, brecciated, flow-banded, aphyric rock | Quartz (illite, pyrite, "anhydrite") |
| 16Z-1, 88–90 | 255.8 | 44 | RA | Completely altered, silicified, sparsely plagioclase-phyric volcanic rock | Quartz, pyrite (illite, pyrophyllite) |
| 16Z-1, 139–141 | 256.29 | 44 | SBD | Silicified, brecciated, flow-banded, aphyric rock | Quartz (pyrite, illite, brittle mica?, "anhydrite") |
| 19Z-1, 0–41 | 268.67 | 45 | HP | Silicified plagioclase-phyric volcanic rock | Quartz (anhydrite, pyrite, illite?, mixed-layer clays?) |
| 22Z-1, 63–67 | 282.73 | 46 | SBD | Completely altered, silicified, aphyric, volcanic rock | Quartz (anhydrite, pyrite, illite, chlorite) |
| 22Z-1, 85–87 | 283.0 | 46 | RA | Completely altered, silicified, aphyric, massive volcanic rock | Quartz, pyrite (gypsum, plagioclase, chlorite, illite, mixed-layer clays, "pyrophyllite") |
| 23Z-1, 25–26 | 286.85 | 48 | SBD | White halo of Piece 3 | Quartz (anhydrite, illite, pyrite, chlorite) |
| 23Z-1, 26–27 | 286.86 | 48 | SBD | Gray kernel of Piece 3 | Quartz (chlorite, illite, pyrite, "anhydrite, smectite") |
| 23Z-1, 102–103 | 287.62 | 49 | SBD | Silicified, green clay-bearing aphyric volcanic rock | Quartz (anhydrite, chlorite, illite, "pyrite") |
| 23Z-2, 13–14 | 288.23 | 49 | SBD | White crust of Piece 2 (anhydrite vein) | Anhydrite ("quartz") |
| 23Z-2, 24–25 | 288.34 | 49 | SBD | Silicified, green clay-bearing aphyric volcanic rock | Quartz (anhydrite, chlorite, illite, pyrite) |
| 23Z-2, 45–46 | 288.55 | 49 | SBD | Silicified, green clay-bearing aphyric volcanic rock | Quartz (anhydrite, chlorite, illite, "pyrite") |
| 23Z-2, 56–63 | 288.66 | 49 | HP | Silicified, green clay-bearing aphyric volcanic rock; light green domain | Quartz, chlorite (anhydrite, illite "pyrite, rutile, gypsum") |
| 23Z-2, 56–63 | 288.66 | 49 | HP | Silicified, green clay-bearing aphyric volcanic rock; light yellow domain | Quartz, anhydrite (pyrite, illite "rutile") |
| 25Z-1, 24–26 | 295.84 | 49 | SBD | Silicified, green clay-bearing aphyric volcanic rock | Quartz, plagioclase (chlorite, pyrite, "anhydrite") |
| 26Z-1, 20–23 | 300.30 | 49 | SBD | Silicified, green clay-bearing aphyric volcanic rock | Quartz (anhydrite, pyrite, illite, chlorite, chlorite-bearing mixed-layer, "smectite") |
| 26Z-2, 34–36 | 301.5 | 50 | RA | Completely altered, silicified, sparsely plagioclase-phyric rock | Quartz, anhydrite, pyrite (gypsum, chlorite, illite) |
| 26Z-2, 60–61 | 301.78 | 50 | SBD | Silicified, plagioclase-phyric volcanic rock | Quartz (chlorite, illite, anhydrite, pyrite) |
| 27Z-1, 22–23 | 304.82 | 50 | SBD | Silicified, plagioclase-phyric volcanic rock | Quartz (anhydrite, pyrite, plagioclase, illite, chlorite) |
| 30Z-1, 5–7 | 318.15 | 51 | SBD | Completely altered, variably silicified breccia | Quartz (plagioclase, illite, chlorite, "pyrite") |
| 30Z-1, 13–20 | 318.23 | 51 | HP | Completely altered, variably silicified, magnetite-bearing, breccia | Quartz (plagioclase, illite "chlorite, magnetite") |
| 31Z-1, 1–3 | 322.61 | 52 | SBD | Silicified, slightly plagioclase-magnetite phyric volcanic rock | Quartz, plagioclase (chlorite, magnetite, pyrite, "anhydrite") |
| 31Z-1, 39–42 | 322.99 | 53 | SBD | Completely altered, variably silicified breccia | Quartz (pyrite, illite, chlorite, "anhydrite") |
| 34Z-1, 22–23 | 336.62 | 54 | SBD | Completely altered aphyric volcanic rock | Quartz (anhydrite, illite, pyrite, "plagioclase") |
| 34Z-1, 27–28 | 336.67 | 55 | SBD | Completely altered volcanic rock and breccia with variable black, late-stage magnetite-bearing alteration | Magnetite (illite, quartz, plagioclase, chlorite, pyrite, Fe-spinel, "brucite") |
| 34Z-1, 40–41 | 336.80 | 55 | SBD | Completely altered volcanic rock and breccia with variable black, late-stage magnetite-bearing alteration | Plagioclase, quartz (illite, chlorite, pyrite, magnetite, "illite-bearing mixed-layer") |
| 34Z-1, 89–90 | 337.29 | 56 | SBD | Completely altered and variably silicified volcanic rock breccia | Quartz (chlorite, illite, "anhydrite, pyrite") |
| 34Z-1, 122–130 | 337.63 | 56 | HP | Completely altered and variably silicified volcanic rock breccia | Quartz, plagioclase, illite (pyrite, chlorite "halite, rutile") |
| 35Z-1, 5–6 | 340.05 | 57 | SBD | Silicified, sparsely vesicular, aphyric, massive volcanic rock | Quartz (plagioclase, pyrite, magnetite, illite, "anhydrite, chlorite") |
| 35Z-1, 46–48 | 340.46 | 57 | SBD | Silicified, sparsely vesicular, aphyric, massive volcanic rock | Quartz (plagioclase, pyrite, chlorite, "illite, anhydrite, magnetite") |
| 35Z-1, 140–141 | 341.40 | 57 | SBD | Silicified, sparsely vesicular, aphyric, massive volcanic rock | Quartz (anhydrite, illite, "pyrite, chlorite") |
| 35Z-2, 48–49 | 341.98 | 57 | SBD | Silicified, sparsely vesicular, aphyric, massive volcanic rock | Quartz (anhydrite, illite, pyrite, "plagioclase") |
| 37Z-1, 6–7 | 344.56 | 57 | SBD | Silicified, sparsely vesicular, aphyric, massive volcanic rock | Quartz, plagioclase (illite, "anhydrite, pyrite, magnetite, chlorite") |
| 37Z-2, 18–20 | 346.00 | 57 | SBD | Silicified, sparsely vesicular, aphyric, massive volcanic rock | Quartz (plagioclase, illite, pyrite, anhydrite, chlorite) |
| 37Z-2, 31–33 | 346.13 | 58 | SBD | Magnetite-rich, clastic rock | Plagioclase (magnetite, illite, alunite, Fe-spinel, chlorite, pyrite, brucite) |
| 37Z-2, 65–68 | 346.47 | 59 | SBD | Silicified, locally magnetite-bearing, aphyric volcanic rock | Quartz (plagioclase, anhydrite, magnetite, "illite, chlorite, pyrite") |
| 38Z-2, 90–92 | 351.19 | 61 | SBD | Completely altered, aphyric, amygdular volcanic rock | Quartz, plagioclase (illite, chlorite, anhydrite, "pyrite, magnetite") |
| 39Z-1, 7–8 | 353.57 | 62 | SBD | Completely altered, sparsely plagioclase-phyric volcanic rock | Quartz (anhydrite, illite, "chlorite, plagioclase, pyrite") |
| 39Z-1, 41–43 | 353.91 | 62 | SBD | Completely altered, sparsely plagioclase-phyric volcanic rock | Quartz (anhydrite, illite, chlorite, "pyrite") |
| 39Z-1, 83–87 | 354.32 | 63 | HP | Completely altered, silicified, aphyric volcanic rock | Quartz, plagioclase (pyrite "anhydrite, chlorite") |
| 39Z-2, 18–19 | 355.10 | 64 | SBD | Completely altered, aphyric volcanic rock | Quartz (anhydrite, illite, chlorite, pyrite, plagioclase, illite-bearing mixed-layer) |
| 40Z-1, 3–5 | 358.03 | 65 | SBD | Completely altered, magnetite-enriched, vesicular volcanic rock | Quartz (plagioclase, anhydrite, illite, chlorite, pyrite, magnetite) |
| 40Z-1, 36–38 | 358.36 | 66 | SBD | Completely altered, sparsely plagioclase-phyric volcanic rock | Quartz (anhydrite, illite, pyrite, "plagioclase, chlorite") |
| 40Z-2, 35–36 | 359.71 | 67 | SBD | Completely altered, clastic-textured volcanic rock | Quartz (anhydrite, illite, pyrite, "plagioclase, chlorite") |
| 41Z-1, 46–47 | 362.96 | 69 | SBD | Completely altered, aphyric, amygdular volcanic rock | Quartz (plagioclase, pyrite, illite, chlorite, "magnetite, anhydrite") |
| 41Z-2, 7–10 | 363.95 | 69 | SBD | Completely altered, aphyric, amygdular volcanic rock | Quartz (plagioclase, pyrite, illite, chlorite, "magnetite, anhydrite") |
| 42Z-1, 30–31 | 367.30 | 70 | SBD | Completely altered, aphyric, sparsely amygdaloidal volcanic rock | Quartz (anhydrite, illite, "pyrite") |
| 42Z-1, 72–74 | 367.72 | 70 | SBD | Completely altered, aphyric, sparsely amygdaloidal volcanic rock | Quartz (anhydrite, chlorite, illite, pyrite, "plagioclase") |
| 43Z-1, 6–8 | 371.56 | 71 | SBD | Completely altered, aphyric, sparsely vesicular volcanic rock | Quartz (illite, pyrite, chlorite, "anhydrite, plagioclase") |
| 43Z-1, 21 | 371.71 | 71 | HP | Completely altered, aphyric, sparsely vesicular volcanic rock; gray central part | Quartz, plagioclase (anhydrite, pyrite, chlorite, illite "halite, rutile") |
| 43Z-1, 21 | 371.71 | 71 | HP | Completely altered, aphyric, sparsely vesicular volcanic rock; light gray margin of piece (alteration halo) | Quartz, illite (anhydrite, pyrite "rutile") |
| 43Z-1, 67–69 | 372.17 | 72 | SBD | Completely altered, magnetite-bearing, aphyric volcanic rock | Quartz, plagioclase (chlorite, pyrite, magnetite, "anhydrite") |
| 43Z-1, 90–91 | 372.40 | 72 | SBD | Completely altered, magnetite-bearing, aphyric volcanic rock | Quartz, plagioclase (chlorite, anhydrite, "pyrite, magnetite") |
| 44Z-1, 85–86 | 374.85 | 72 | SBD | Completely altered, magnetite-bearing, aphyric volcanic rock | Quartz, plagioclase (chlorite, anhydrite, "pyrite, magnetite") |
Notes: SBD = shipboard data, RA = postcruise data from R. Asada, HP = postcruise data from H. Paulick. 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.