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Table T4. Interpretation of X-ray diffraction patterns, Holes U1309B and U1309D, Expedition 304.

Core, section,
interval (cm)		 Rock type Preparation Mineral phases Possible trace
Main Minor
304-U1309B-
1R-3, 17–21 Rubble Standard slide Talc, serpentine (liz/ctl) Pyrite/Chlorite  
1R-3, 114–116 Basalt Standard slide Plagioclase, amphiboles Chlorite  
2R-1, 88–92 Basalt Standard slide Plagioclase, amphiboles   Clays
2R-2, 20–23 Basalt Standard slide Plagioclase, amphiboles Chlorite  
3R-1, 60–63 Basalt Standard slide Plagioclase, amphiboles    
3R-1, 71–74 Basalt breccia Standard slide Plagioclase, amphiboles   Clays, pyroxene
5R-1, 127–129 Green vein in oxide diabase Standard slide Plagioclase, amphiboles    
5R-2, 55–56 Yellow patches in oxide diabase Smear slide Amphiboles Saponite Plagioclase, pyroxene
5R-2, 90–94 Oxide diabase Standard slide Plagioclase, amphiboles   Chlorite, pyroxene
6R-1, 97–102 Oxide diabase Standard slide Plagioclase, amphiboles Chlorite  
8R-1, 37.5–38 Pale green patches in gabbro Smear slide Amphiboles Chlorite  
8R-1, 115–118 Gabbro Standard slide Plagioclase, amphiboles Chlorite Magnetite
10R-1, 0–3 Gabbro Standard slide Plagioclase, amphiboles Chlorite  
11R-1, 100–104 Harzburgite Standard slide Serpentine (liz/ctl), talc, olivine, pyroxene Chlorite Magnetite
11R-2, 68–70 Rubble (harzburgite) Standard slide Amphiboles   Magnetite
11R-2, 80–90 Harzburgite Standard slide Talc, serpentine (liz/ctl) Magnetite, chlorite Clays, olivine
12R-1, 126–13 Oxide diabase Standard slide Plagioclase, amphiboles   Pyroxene
13R-1, 120–125 Microdiabase Standard slide Plagioclase, amphiboles Chlorite Magnetite
14R-1, 67–70 Pale green cavity in troctolitic gabbro Standard slide Amphiboles   Clays (saponite?)
14R-1, 107–109 Basalt Standard slide Plagioclase, amphiboles Chlorite  
15R-2, 80–84 Olivine gabbro Standard slide Plagioclase, chlorite Amphiboles  
16R-3, 20–26 Olivine gabbro Standard slide Plagioclase, chlorite Amphiboles  
17R-2, 5–9 Olivine gabbro Standard slide Plagioclase Amphiboles, chlorite  
18R-1, 20–23 Basalt Standard slide Plagioclase, amphiboles   Chlorite
18R-2, 35–38 Olivine gabbro Standard slide Plagioclase, pyroxene Amphiboles Chlorite
18R-3, 110–112 Basalt Standard slide Plagioclase, pyroxene Amphibole, chlorite  
19R-2, 38–40 Oxide diabase Standard slide Plagioclase Pyroxene, amphiboles Chlorite
20R-2, 72–74 Diabase Standard slide Plagioclase Amphiboles  
304-U1309D-
1R-1, 32–37 Diabase Standard slide Plagioclases, amphibole Chlorite  
2R-1, 85–90 Diabase Standard slide Plagioclases, amphibole Chlorite  
4R-1, 21–23 Fine-grained diabase Standard slide Plagioclases, amphibole   Chlorite
4R-2, 0–7 Matrix breccia in cataclastic gabbro Smear slide Amphibole Clays (saponite?)  
4R-2, 112–113 Cataclastic gabbro Standard slide Plagioclases, amphibole   Chlorite
5R-2, 52–57 Troctolitic gabbro Standard slide Plagioclases, chlorite, amphibole    
5R-3, 114–118 Troctolitic gabbro Standard slide Plagioclases, chlorite, amphibole    
5R-4, 11–20 (1) Green material in cavity around pink mineral in a troctolitic gabbro Smear slide Chlorite, amphibole, unknown mineral    
5R-4, 11–20 (2) Pink mineral in cavity of troctolitic gabbro Smear slide Unknown mineral    
5R-4, 14–16 Pink mineral in cavity of troctolitic gabbro Smear slide Unknown mineral    
6R-1, 124–126 Olivine gabbro Standard slide Plagioclases, chlorite, amphibole    
6R-2, 70–73 Diabase Standard slide Plagioclases, amphibole Chlorite  
6R-3, 16–21 Diabase Standard slide Plagioclase Amphibole Chlorite
7R-2, 26–33 Diabase Standard slide Plagioclase Amphibole Chlorite
7R-3, 102–105 Gabbro Standard slide Plagioclases, amphibole   Chlorite
8R-1, 120–127 Troctolitic gabbro Standard slide Saponite, amphibole    
8R-2, 56–57 Green cavity in troctolitic gabbro Standard slide Amphibole Clay (saponite?)  
8R-2, 123–130 Troctolitic gabbro Smear slide Amphibole, chlorite Talc(?) Plagioclase
8R-3, 3–7 Vein in gabbro Smear slide Clay (saponite?)    
9R-1, 37–42 Fine-grained diabase Standard slide Plagioclase Amphibole  
9R-1, 73–77 Olivine gabbro Standard slide Plagioclase Amphibole, chlorite  
9R-2, 136–139 Brown vein in olivine gabbro Standard slide Plagioclases, amphibole, saponite Calcite  
10R-1, 107–111 Harzburgite Standard slide Olivine, serpentine Talc, magnetite Amphibole
11R-2, 38–43 Olivine gabbro Standard slide Amphibole, chlorite Plagioclase  
12R-1, 62–64 Olivine gabbro Standard slide Plagioclase Amphibole, chlorite  
13R-1, 59–67 Gabbro Standard slide Plagioclase Amphibole, chlorite Talc
14R-1, 96–103 Troctolite Standard slide Plagioclase Amphibole, chlorite  
14R-1, 107–109 Olivine gabbro Standard slide Plagioclase Amphibole Chlorite
14R-2, 128–132 Basalt Standard slide Plagioclase Amphibole Chlorite
15R-1, 140–142 Brown vein in fine-grained diabase Standard slide Amphibole, clay (saponite?)    
15R-2, 4–6 Brown fracture coating in diabase Smear slide Clay(?)    
15R-2, 72–74 Blue green vein in diabase Standard slide Amphibole? (cummingtonite?)    
15R-2, 125–131 Diabase Standard slide Plagioclase Amphibole, chlorite  
16R-2, 62–68 Diabase Standard slide Plagioclases, amphibole Chlorite  
16R-4, 90–92 Diabase Standard slide Plagioclases, amphibole    
16R-4, 136–140 Basalt Standard slide Plagioclases, amphibole    
16R-5, 18–26 Gabbro Standard slide Plagioclase Amphibole, chlorite Pyroxene
17R-1, 60–66 Olivine gabbro Standard slide Plagioclase Amphibole, chlorite  
17R-3, 122–123 Blue-green vein in olivine gabbro Smear slide Amphibole Chlorite, clays (saponite?)  
20R-1, 70–73 Fine-grained diabase Standard slide Plagioclases, amphibole Chlorite  
22R-3, 43–49 Troctolitic gabbro Standard slide Plagioclase Amphibole, chlorite  
23R-1, 79–84 Troctolitic gabbro Standard slide Plagioclase, chlorite Amphibole  
23R-2, 0–4 Ultramafic cumulate Standard slide Serpentine, olivine, magnetite    
23R-2, 95–97 Ultramafic cumulate with troctolitic bands Standard slide Plagioclase, chlorite, amphibole    
25R-3, 24–31 Olivine-bearing gabbro Standard slide Plagioclase Chlorite, amphibole Talc
26R-1, 15–26 Orthopyroxene-bearing gabbro Standard slide Plagioclase Chlorite, amphibole Talc
26R-2, 127–134 Olivine-bearing gabbro Standard slide Plagioclase Chlorite, amphibole Talc
27R-1, 88–94 Olivine gabbro Standard slide Plagioclase Chlorite, amphibole Talc
28R-2, 70–74 Olivine-bearing gabbro Standard slide Plagioclase Chlorite, amphibole Talc
28R-4, 27–33 Orthopyroxene-bearing gabbro Standard slide Plagioclase, amphibole Chlorite, talc Pyroxene
30R-1, 58–65 Layered gabbro Standard slide Plagioclase Chlorite, amphibole  
31R-1, 25–28 Dunite Standard slide Serpentine, magnetite   Talc, chlorite
31R-2, 11–17 Harzburgite Standard slide Serpentine, magnetite   Talc, chlorite
32R-2, 22–30 Olivine-bearing gabbro Standard slide Plagioclase Chlorite, amphibole Talc
33R-2, 55–64 Olivine-bearing gabbro Standard slide Plagioclase, chlorite Amphibole, talc Pyroxene
33R-3, 21–26 Vein in olivine-bearing gabbro Standard slide Plagioclase, chlorite, amphibole    
35R-1, 53–65 Oxide gabbro Standard slide Plagioclase, magnetite Chlorite, amphibole Pyroxene
36R-3, 80–82 Felsic/dioritic dike in olivine-gabbro Standard slide Plagioclase Amphibole  
36R-3, 98–106 Olivine gabbro Standard slide Plagioclase Chlorite, amphibole, talc  
38R-1, 45–51 Olivine-bearing gabbro Standard slide Plagioclase Chlorite, amphibole, talc  
39R-2, 22–30 Olivine gabbro Standard slide Plagioclase, chlorite Amphibole, talc  
41R-1, 116–124 Troctolite/Olivine gabbro Standard slide Plagioclase, chlorite, amphibole    
43R-2, 65–66 Vein in olivine gabbro Smear slide Calcite, clays (saponite?), amphibole    
44R-1, 22–29 Olivine gabbro Standard slide Plagioclase, chlorite, amphibole    
44R-1, 36–37 Vein in olivine gabbro Smear slide Amphibole, clays (saponite?)    
44R-1, 142–147 White patches in altered olivine from an olivine gabbro Smear slide Amphibole, talc, serpentine, tusodite?    
44R-4, 29–34 Vein in olivine-bearing gabbro Smear slide Amphibole, calcite Plagioclase, clays (saponite?)  
45R-3, 18–24 Oxide gabbro Standard slide Plagioclase, amphibole, magnetite Chlorite  
48R-1, 44–53 Gabbro with troctolite bands Standard slide Plagioclase, pyroxene Chlorite, amphibole, talc  
48R-1, 111–119 Troctolite Standard slide Plagioclase Chlorite, amphibole, talc  
50R-2, 54–55 Olivine gabbro Smear slide Amphibole, chlorite    
50R-2, 61–62 Olivine gabbro Smear slide Talc, amphibole, chlorite   Clays (saponite?)
51R-2, 50–53 Olivine-bearing gabbro Standard slide Plagioclase, chlorite, amphibole    
51R-4, 0–12 Olivine-bearing gabbro Standard slide Plagioclase Amphibole, chlorite Talc, pyroxene
52R-2, 72–75 Vein in gabbro (hydroscopic vein) Smear slide Calcite, clays (saponite?)    
52R-3, 15–16 Vein in gabbro (hydroscopic vein) Smear slide Calcite, clays (saponite?)    
53R-1, 52–59 Gabbro Standard slide Plagioclase Chlorite, amphibole  
54R-3, 82–85 Olivine gabbro Standard slide Serpentine, magnetite Chlorite, amphibole  
54R-3, 58–66 Olivine gabbro Standard slide Serpentine, magnetite Chlorite, amphibole  
55R-2, 10–11 Vein in olivine gabbro (hydroscopic vein) Smear slide Calcite, clays (saponite?), celestine?    
55R-3, 81–87 Olivine-bearing gabbro Standard slide Plagioclase, chlorite, amphibole   Talc
56R-2, 106–114 Troctolitic gabbro Standard slide Plagioclase, chlorite, serpentine Amphibole  
56R-3, 55–56 Vein in troctolitic gabbro Smear slide Calcite, clays (saponite?) Serpentine  
56R-3, 93–100 Troctolitic gabbro Standard slide Serpentine, pyroxene, magnetite Chlorite  
57R-2, 133–143 Olivine-bearing gabbro Standard slide Plagioclase, chlorite, talc Amphibole  
59R-3, 99–109 Olivine-bearing gabbro Standard slide Plagioclase Amphibole, chlorite Talc
60R-2, 40–47 Dunite cumulate Standard slide Serpentine, magnetite, olivine    
60R-3, 56–64 Olivine gabbro cumulate Standard slide Serpentine, magnetite, olivine Titanite  
64R-2, 82–87 Dunite cumulate Standard slide Serpentine, magnetite Chlorite  
66R-3, 33–36 Troctolite Standard slide Serpentine, magnetite    
68R-3, 47–60 Olivine-bearing gabbro Standard slide Plagioclase Amphibole, chlorite, talc  
69R-1, 66–72 Oxide gabbro Standard slide Plagioclase, magnetite Amphibole, chlorite  
70R-2, 43–53 Serpentinized leucocratic troctolitic gabbro Standard slide Plagioclase, amphibole, magnetite    
72R-1, 72–81 Layered leucocratic olivine gabbro Standard slide Plagioclase, chlorite, amphibole    
73R-2, 75–85 Olivine gabbro Standard slide Plagioclase, chlorite, amphibole    
74R-1, 105–113 Gabbro Standard slide Plagioclase, chlorite, amphibole Talc(?)  
76R-1, 93–102 Leucocratic olivine gabbro Standard slide Plagioclases, chlorite, amphibole    
77R-4, 41–48 Leucocratic olivine gabbro Standard slide Serpentine, plagioclase, magnetite Chlorite  

Note: liz = lizardite, ctl = chrysotile.

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