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Table T7. Interpreted results of X-ray diffraction (XRD) analyses of samples, Site C0014.

Sample
number 		Core, section,
interval (cm) 		Lithology Subsampled for Result
  331-C0014A-
30301 1H-1, 30–32 Very soft, brown silty clay Routine chemistry Quartz, calcite, muscovite, anorthite, Mg chlorite
30306 1H-3, 30–32 Soft brown silty clay Routine chemistry Quartz, muscovite, Mg chlorite, albite/microcline, orthopyroxene ???
30310 1H-5, 30–32 Clast-supported pumiceous gravel Routine chemistry Quartz, muscovite, pyrite, albite, lithium plagioclase ???
30317 1H-CC, 20–22 Clast-supported pomaceous gravel Routine chemistry Quartz and opal, pyrite, anorthite
  331-C0014B-
30540 1H-1, 19–21 Brown mud Routine chemistry Calcite, quartz, anorthite, muscovite, Mg chlorite
30542 1H-3, 60–62 Brown mud Routine chemistry Quartz, calcite, muscovite, Mg chlorite, anorthite, pyrite
30544 1H-5, 52–54 Brown mud Routine chemistry Quartz, calcite, muscovite, Mg chlorite, anorthite, pyrite
30609 2H-1, 70–72 Indurated dark gray clay Routine chemistry Quartz, muscovite, Mg chlorite, anorthite, pyrite
30614 2H-2, 54–56 Pumiceous grit Routine chemistry Less crystalline quartz, muscovite, Mg chlorite, anorthite, pyrite
30618 2H-3, 117–119 Pumiceous gravel Routine chemistry Less crystalline quartz, muscovite, Mg chlorite, anorthite, pyrite
30661 2H-4, 10–12 Pumiceous gravel/grit Routine chemistry Less crystalline quartz, muscovite, Mg chlorite, anorthite, pyrite
30669 2H-4, 50–51 Altered grayish-blue clay XRD only Less crystalline pyrite, quartz, kaolinite
30671 2H-5, 88–89 Dark gray clay XRD only Quartz, kaolinite, pyrite, barite
30621 2H-6, 11–13 Mottled dark clay Routine chemistry Barite, kaolinite, muscovite, quartz, pyrite
30626 2H-6, 57–59 Pale bluish-gray clay Routine chemistry Kaolinite, pyrite, covellite ???
30688 2H-7, 12–13 Bluish clay with white clay spots XRD only Kaolinite, pyrite
30709 2H-9, 56–58 Dark gray clay Routine chemistry Quartz, pyrite, muscovite
30712 2H-11, 2–4 Gray clay with white spots Routine chemistry Kaolinite, quartz, pyrite, sphalerite/wurtzite
30715 2H-12, 55–57.5 Dark gray clay Routine chemistry Pyrite, noncrystalline layer silicate
30781 3H-1, 26–27 Gray clay with white spots XRD only Pyrite, kaolinite, muscovite (breaking down)/montmorillonite
30782 3H-1, 48–50 Pale bluish-gray clay Routine chemistry Quartz, muscovite, pyrite
30785 3H-2, 24–26 Pale bluish-gray clay Routine chemistry Muscovite, quartz, pyrite
30847 3H-3, 44–46 Gray clay/grit possible; ash alteration Routine chemistry Pyrite, muscovite/illite/montmorillonite, quartz
30850 3H-4, 54–56 Gray clay Routine chemistry Quartz, pyrite, muscovite
30853 3H-5, 80–82 White/Gray clay Routine chemistry Pyrite, quartz, muscovite/illite/montmorillonite
30857 3H-8, 95–97 White/Gray clay Routine chemistry Pyrite, quartz, muscovite/illite/montmorillonite
30859 3H-10, 43H–45 Gray/Bluish clay Routine chemistry Pyrite, muscovite/montmorillonite
30862 3H-12, 2–3H- Altered pumice clast XRD only Quartz, pyrite, muscovite/illite/montmorillonite
30981 4H-1, 42–44 Gray/White hydrothermal clay Routine chemistry Pyrite, Mg chlorite, quartz
30986 4H-2, 89–91 Dark gray/brown hydrothermal clay with sulfides Routine chemistry Pyrite, Mg chlorite, quartz
30991 4H-3, 12–14 White/Gray hydrothermal clay Routine chemistry Pyrite, quartz, Mg chlorite, muscovite
31012 4H-3, 132–134 Gray clast Identify clast composition; XRD only Pyrite, Mg chlorite, quartz, muscovite
30994 4H-4, 58–60 Dark gray/brown hydrothermal clay Routine chemistry Mg chlorite, pyrite, quartz, covellite ???
31018 4H-4, 90–92 Dark brown clast Identify clast composition; XRD only Mg chlorite, pyrite, sphalerite/wurtzite
30999 4H-6, 13–15 White/Gray hydrothermal clay Routine chemistry Quartz, pyrite, Mg chlorite
31002 4H-7, 39–41 Dark gray/brown hydrothermal clay Routine chemistry Mg chlorite, pyrite, muscovite
31006 4H-8, 18–20 Gray/White hydrothermal clay Routine chemistry Mg chlorite, pyrite
31010 4H-9, 40–42 Gray/White hydrothermal clay Routine chemistry Mg chlorite, pyrite
31498 5H-3, 21.5–23.5 Pale gray clay from pseudoclastic mottling Routine chemistry Mg chlorite, pyrite, copper sulfide ???, antigorite??
31510 5H-4, 30–32 Mottled clay bulk sample Routine chemistry Mg chlorite, pyrite, copper sulfide???
31501 5H-5, 12–14 Dark gray clay from pseudoclastic mottling Routine chemistry Pyrite, Mg chlorite, quartz
31502 5H-6, 24–26 Very pale gray clay Routine chemistry Mg chlorite, pyrite, muscovite
31120 5H-11, 80–82 White/Gray clay Routine chemistry Mg chlorite, pyrite, quartz
31127 5H-12, 80–82 White/Gray clay Routine chemistry Mg chlorite, pyrite, muscovite
31124 5H-13, 104–107 Silica cemented volcaniclastic clast Routine chemistry Quartz, pyrite, muscovite
31131 5H-15, 27–29 White/Gray clay with pumice fragments Routine chemistry Quartz, pyrite, muscovite
  331-C0014C-
31222 1H-1, 12–14 Pumiceous gravel/grit Routine chemistry Quartz, anorthite, muscovite, kaolinite
31229 1H-4, 29–31 Pumiceous gravel/grit Routine chemistry Poorly crystalline quartz/opal, covellite, pyrite
31232 1H-4, 97–99 Green grit and pumice Routine chemistry Poorly crystalline quartz/opal, pyrite, corundum
31236 1H-6, 37.5–39.5 Green material and pumice Routine chemistry Poorly crystalline quartz/opal, covellite
  331-C0014D-
31257 1H-1, 2–5 Volcanic sand Routine chemistry Quartz, calcite, pyrite, halite, muscovite (minimal)-cryptocrystalline
31260 1H-1, 98–100 Silty mud Routine chemistry Quartz, anorthite, muscovite, pyrite, Mg chlorite, cristobalite ???
31264 1H-2, 108–110 Pumice clasts with grit Routine chemistry Poorly crystalline quartz/opal, pyrite
31278 1H-3, 80–82 Greenish clayey pumiceous grit Routine chemistry Quartz, anorthite, muscovite, kaolinite
31282 1H-4, 80–82 Gray clast-supported pumiceous grit Routine chemistry Poorly crystalline quartz/opal, covellite, pyrite
31338 2H-1, 30–32 Black pumice clast Routine chemistry Poorly crystalline quartz/opal, pyrite, sphalerite/wurtzite
31342 2H-2, 30–32 Altered pumice clast, light gray Routine chemistry Opal, pyrite, halite
31346 2H-3, 37–39 Dark gray hydrothermal mud with pumice Routine chemistry Pyrite, halite, muscovite, quartz, sulfur???
31348 2H-3, 115–117 Light gray clay/mud before transition “hydrothermal” Routine chemistry Pyrite, halite, quartz, sulfur ???, muscovite/illite/montmorillonite
31353 2H-3, 132.5–134.5 Dark gray clay after transition “hydrothermal” Routine chemistry Quartz, pyrite, muscovite, anorthite
31354 2H-4, 98–99 Dark sulfide deposit XRD only Pyrite, quartz, kaolinite
31355 2H-5, 20–22 Light brown material on surface “hydrothermal” Routine chemistry Kaolinite, pyrite, quartz, woodhouseite, anorthite
31359 2H-6, 60–62 Dark gray clay/mud “hydrothermal” Routine chemistry Quartz, pyrite, muscovite
31362 2H-7, 50–52 Black/gray clay “hydrothermal” Routine chemistry Pyrite, quartz, muscovite, marcasite??
31365 2H-8, 30–32 Gray clay “hydrothermal” Routine chemistry Quartz, pyrite, muscovite
31367 2H-CC, 5–6 Gray hydrothermal clay XRD only Pyrite, quartz, muscovite/illite/montmorillonite, covellite ???
  331-C0014E-
31437 1H-2, 40–42 Pumiceous grit Routine chemistry Quartz, anorthite, cristobalite, pyrite, muscovite/illite/montmorillonite
31439 1H-3, 134–136 Gray clay—hydrothermal Routine chemistry Quartz, pyrite, muscovite
31441 1H-4, 125–127 Gray and white clay—mottled, hydrothermal Routine chemistry Pyrite, quartz, anorthite, muscovite/illite/montmorillonite
31443 1H-5, 80–82 Gray and white clay—mottled, hydrothermal Routine chemistry Quartz, pyrite, muscovite/illite/montmorillonite, sphalerite/wurtzite
31445 1H-6, 30–32 Gray clay—hydrothermal Routine chemistry Quartz, muscovite, pyrite
31447 1H-7, 75–77 Gray and white clay—mottled, hydrothermal Routine chemistry Quartz, pyrite, muscovite/illite/montmorillonite
31449 1H-8, 40–42 Gray and white clay—mottled, hydrothermal Routine chemistry Quartz, pyrite, copper sulfide, muscovite/illite/montmorillonite
31451 1H-9, 20–22 Gray clay—hydrothermal Routine chemistry Quartz, muscovite, pyrite, sphalerite/wurtzite
31468 2H-1, 92–94 Gray-white mottled clay Routine chemistry Quartz, pyrite, dolomite, Mg chlorite, muscovite (minor)
31470 2H-4, 85–87 Dark brownish-gray pyritic clay Routine chemistry Pyrite, Mg chlorite, dolomite, halite
31473 2H-5, 123–125 Pseudoclastic textured mottled clay Routine chemistry Mg chlorite, pyrite, halite, muscovite
31474 2H-6, 107–109 Gritty gray-white mottled clay Routine chemistry Quartz, pyrite, muscovite
31476 2H-7, 44–46 Gray-white mottled clay Routine chemistry Pyrite, Mg chlorite, quartz, halite, kaolinite, Ag sulfide ???
31478 2H-8, 110–112 Gray-white mottled clay Routine chemistry Pyrite, Mg chlorite, kaolinite (minor)
  331-C0014F-
32735 1H-1, 5–7 Oxidized silty clay Routine chemistry Calcite, quartz, halite, muscovite, anorthite, chlorite
32737 1H-2, 80–82 Olive-green reduced clay Routine chemistry Quartz, chlorite, muscovite, calcite, anorthite
32739 1H-3, 82–84 Foraminiferal silt Paleontology  
32740 1H-4, 64–66 Gritty olive-green clay Routine chemistry Quartz, muscovite, chlorite, cristobalite
32742 1H-5, 78–80 Pumiceous gravel Routine chemistry Noncrystalline SiO2, quartz, halite, muscovite (trace)
  331-C0014G-
32825 1H-1, 0–2 Oxidized foraminiferal sand Routine chemistry Quartz, muscovite, calcite, chlorite, halite, cristobalite, pyrite (trace)
32823 1H-2, 20–22 Olive-green reduced clay Routine chemistry Quartz, muscovite, calcite, chlorite, halite, pyrite, cristobalite
32816 1H-3, 120–122 Olive-green reduced clay Routine chemistry Quartz, muscovite, pyrite, cristobalite, chlorite
32820 1H-5, 10–12 Gray hydrothermal clay Routine chemistry Quartz, muscovite, anorthite, pyrite, Mg chlorite (trace)
32813 1H-6, 36–38 Tube pumice Routine chemistry Noncrystalline SiO2, halite
32809 1H-7, 48–50 Sugary, partially devitrified pumice Routine chemistry Noncrystalline SiO2, halite, quartz
32867 2H-1, 42–44 Pumice clast Routine chemistry Noncrystalline SiO2, quartz, halite, pyrite
32878 2H-2, 37.5–40 Pumice clast—black Routine chemistry Noncrystalline SiO2, halite, pyrite
32875 2H-4, 88–90 Altered clay matrix, pumice horizon Routine chemistry Quartz, muscovite
32881 2H-4, 115–117 Melting pumice Routine chemistry Muscovite, halite, pyrite, quartz
32880 2H-5, 45–47 Chlorite and pyrite alteration, H2S smell Routine chemistry Muscovite, pyrite, quartz, halite (trace)
32884 2H-6, 26–28 Clay, dark brown Routine chemistry Quartz, muscovite/illite/montmorillonite, pyrite, cristobalite (minimal), halite
32886 2H-7, 80–82 Clay, dark brown Routine chemistry Quartz, muscovite, pyrite, Mg chlorite
32955 3H-1, 8–10 Gray clay Routine chemistry Quartz, muscovite, pyrite, Mg chlorite
32959 3H-2, 26–28 Gray clay Routine chemistry Pyrite, muscovite/illite/montmorillonite, anorthite, quartz, halite (trace)
32960 3H-3, 19–20 Interesting sand XRD only Quartz, anorthite, pyrite, muscovite
32961 3H-3, 30–32 Gray clay Routine chemistry Quartz, muscovite, pyrite
32965 3H-4, 96–98 Gray clay Routine chemistry Quartz, muscovite, pyrite, halite
32968 3H-4, 28.5–30.5 Light gray clay Routine chemistry Muscovite/Illite/montmorillonite, pyrite, halite
32970 3H-5, 27–29 Gray clay Routine chemistry Quartz, pyrite, muscovite
32971 3H-5, 83–85 Gray clay and white spots Routine chemistry Pyrite, muscovite, illite/montmorillonite
32974 3H-7, 50–52 Gray clay Routine chemistry Dolomite, quartz, pyrite, muscovite/illite/montmorillonite
32975 3H-8, 116–118 Dark gray clay Routine chemistry Quartz, pyrite, muscovite, Mg chlorite (trace)
32995 3H-9, 85–87 White to gray mottled Routine chemistry Muscovite/Illite/Montmorillonite, pyrite, copper sulfide, quartz
32997 3H-10, 40–42 Dark gray clay Routine chemistry Quartz, Pyrite, muscovite
32998 3H-CC, 70–72 Dark gray clay Routine chemistry Quartz, dolomite, muscovite, pyrite, Mg chlorite
33220 4H-1, 47–49 Dark gray clay Routine chemistry Mg chlorite, pyrite, dolomite, clinopyroxene ???, halite
33181 4H-2, 2–4 Sulfate-carbonate concretions XRD only Monetite (CaHPO4), calcite, quartz
33222 4H-5, 80–82 Pale gray mottled clay Routine chemistry Mg chlorite, pyrite, quartz (trace)
33224 4H-6, 80–82 Dark gray clay Routine chemistry Mg chlorite, pyrite, muscovite
33226 4H-7, 70–72 Very pale gray clay Routine chemistry Mg chlorite, muscovite, pyrite
33228 4H-8, 91–93 Silicified altered volcaniclastic clast Routine chemistry Quartz, pyrite, muscovite
33230 4H-10, 60–62 Pale gray mottled clay Routine chemistry Mg chlorite, pyrite, muscovite, quartz
33232 4H-CC, 14–16 Very pale gray clay Routine chemistry Quartz, pyrite, Mg chlorite, muscovite
33254 5H-3, 45–47 Pale indurated clay Routine chemistry Mg chlorite, pyrite, muscovite, quartz
33256 5H-4, 30–32 Soupy pale gray clay Routine chemistry Pyrite, muscovite, Mg chlorite
33258 5H-5, 68–70 Sandy clay with quartz Routine chemistry Quartz, pyrite, muscovite, wairakite [CaAl2Si4O10.2H2O] ???
33286 6H-2, 38–40 Indurated pale gray clay Routine chemistry Quartz, muscovite, pyrite, halite
33288 6H-3, 80–82 Indurated pale gray clay Routine chemistry Quartz, muscovite, Mg chlorite, pyrite, halite
33290 6H-5, 6H-7–6H-9 Hard silicified gray volcaniclastic clast Routine chemistry Quartz, muscovite, pyrite
33292 6H-CC, 10–12 Soupy pale gray clay Routine chemistry Mg chlorite, muscovite, quartz, pyrite
33303 8H-CC, 6–8 Sticky pale gray clay with redrill fragments Routine chemistry Quartz, Mg chlorite, muscovite, pyrite (3 last phases trace)
33326 9X-1, 14–16 Silicified sugary altered volcaniclastic clast Routine chemistry Quartz, muscovite, Mg chlorite, pyrite
33327 9X-2, 64–66 Gritty sticky gray clay Routine chemistry Quartz, muscovite, Mg chlorite, pyrite
33330 9X-CC, 27–29 Very hard indurated gray clay Routine chemistry Quartz, Mg chlorite, anhydrite, pyrite
33332 10H-CC, 5–7 Silicified volcanic rock Routine chemistry Quartz, Mg chlorite, muscovite, pyrite (3 last phases trace)
33333 11X-1, 3–5 Silicified feldsparphyric volcanic rock Routine chemistry Quartz, pyrite, Mg chlorite, anhydrite, muscovite
33335 11X-CC, 30–32 Hard indurated clay with anhydrite veining Routine chemistry Quartz, anhydrite, Mg chlorite, muscovite, pyrite (trace)
33362 12H-2, 74–76 Hard indurated clay with anhydrite veining Routine chemistry Anhydrite, quartz, muscovite, pyrite, Mg chlorite (trace)
33387 13T-1, 28–30 Unconsolidated gray mud Routine chemistry Quartz, muscovite, Mg chlorite, pyrite
33389 13T-1, 46–47 Consolidated gray clast XRD only Quartz, pyrite, muscovite, Mg chlorite (trace)
33390 13T-2, 79.5–81.5 Gray mud matrix Routine chemistry Quartz, muscovite, Mg chlorite, anhydrite, pyrite
33393 13T-3, 59–61 Gray mud matrix with clast Routine chemistry Quartz, muscovite, Mg chlorite, halite, pyrite
33394 13T-4, 22–24 Gray mud matrix with clast Routine chemistry Quartz, muscovite, Mg chlorite, halite, pyrite
33415 14T-1, 18–20 Gray mud matrix Routine chemistry Mg chlorite, pyrite, quartz
33417 14T-2, 51–53 Hard dark gray clast with white spots Routine chemistry Quartz, muscovite, anhydrite, pyrite
33420 14T-3, 42–44 Gray mud matrix Routine chemistry Quartz, muscovite, pyrite, Mg chlorite
33408 15T-CC, 17–19 Gray hydrothermal clay Routine chemistry Quartz, muscovite, Mg chlorite, pyrite
33431 16T-1, 7–9 Gray hydrothermal clay, with silica-anhydrite veins Routine chemistry Quartz, muscovite, pyrite, Mg chlorite, anhydrite
33433 16T-2, 10–12 Gray hydrothermal clay, with silica-anhydrite veins Routine chemistry Quartz, pyrite, muscovite, halite
33612 17T-1, 34–36 Gray hydrothermal clay, with silica-anhydrite veins Routine chemistry Quartz, pyrite, anhydrite, muscovite
33614 17T-2, 20–22 Gray hydrothermal clay, with silica-anhydrite veins Routine chemistry Muscovite, pyrite, quartz, Mg chlorite, anhydrite
33617 17T-3, 40–42 Gray hydrothermal clay, with silica-anhydrite veins Routine chemistry Anhydrite, quartz, muscovite, pyrite
33619 17T-4, 40–42 Gray hydrothermal clay, with silica-anhydrite veins Routine chemistry Anhydrite, pyrite, muscovite, quartz
33632 18T-2, 34–36 Dark gray indurated mud Routine chemistry Pyrite, muscovite, Mg chlorite
33634 18T-3, 83–85 Pale bluish gray clay with anhydrite Routine chemistry Anhydrite, muscovite, pyrite, unidentified phyllosilicate (maybe kaolinite ???)
33636 18T-CC, 12–14 Pale green clay Routine chemistry Mg chlorite, quartz, unidentified phyllosilicate (maybe kaolinite ???)
33638 19T-CC, 15–17 Gray clay with silicified volcaniclastic fragments Routine chemistry Quartz, anhydrite, pyrite, muscovite
33652 20T-1, 30–32 Pale gray siliceous sand and hydrothermal clay Routine chemistry Quartz, muscovite, pyrite
33654 20T-CC, 36.5–39 Siliceous nodule Routine chemistry Quartz, pyrite (trace)
33679 21T-2, 74–76 Sugary white sandy clay Routine chemistry Quartz, muscovite, unidentified phyllosilicate (maybe kaolinite ???)
33681 21T-3, 79–81 Hydrothermal breccia, with clast and clay Routine chemistry Quartz, anhydrite, pyrite, muscovite, Mg chlorite, siderite ???
33656 22X-1, 7–10 Silica clay altered volcaniclastic clast Routine chemistry Quartz, pyrite, muscovite
33658 22X-CC, 3–5 Pale gray laminated indurated clay Routine chemistry Muscovite, pyrite, Mg chlorite, anhydrite
33660 22X-CC, 10–12 Dark gray indurated clay Routine chemistry Quartz, anhydrite, muscovite, Mg chlorite, pyrite
33940 23X-1, 5–8 White silicified vesicular volcanic clast with pyrite Routine chemistry Quartz, muscovite, pyrite
33942 23X-2, 13–15 Pale gray gritty hydrothermal clay Routine chemistry Quartz, muscovite, pyrite
34021 24T-1, 11–13 White silicified vesicular volcanic clast with pyrite Routine chemistry Quartz, Mg chlorite, muscovite, pyrite, halite
34023 24T-1, 22–24 Pale gray gritty hydrothermal clay Routine chemistry Quartz, muscovite, pyrite, anhydrite, Mg chlorite
34037 24T-2, 11–12 White silicified vesicular volcanic clast with pyrite XRD only—mineralogy of clast Quartz, muscovite, pyrite, Mg chlorite
34035 24T-2, 90–92 Pale gray gritty hydrothermal clay Routine chemistry Quartz, muscovite, Mg chlorite, pyrite
34034 24T-3, 55–57 Pale gray gritty hydrothermal clay Routine chemistry Quartz, muscovite, Mg chlorite, anhydrite, pyrite
34038 24T-4, 49.5–51.5 Pale gray gritty hydrothermal clay Routine chemistry Quartz, muscovite, Mg chlorite, pyrite
34040 24T-CC, 40–42 Silicified flow-banded volcanic clast Routine chemistry Quartz, muscovite, Mg chlorite, pyrite
34059 25T-1, 28.5–30.5 Pale gray gritty hydrothermal clay Routine chemistry Quartz, muscovite, Mg chlorite, pyrite
34062 25T-CC, 0–4 Silicified brecciated volcanic clast Routine chemistry Quartz, pyrite, muscovite, halite
34091 26T-CC, 0–1 Silicified pebbles of redrill Routine chemistry Quartz, pyrite, anhydrite, muscovite
34463 30X-1, 10–12 Silicified pumiceous altered volcanic clast Routine chemistry Quartz, Mg chlorite

Phases listed in approximate order of decreasing abundance.

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