Table T6. Metamorphic domains described in thin section, Hole U1415J.
|
Core, section, interval (cm) |
Thin section number | Depth (mbsf) | Rock name |
Number of domains |
Alteration domain | Domain relative abundance (%) | Alteration domain or feature | |
|---|---|---|---|---|---|---|---|---|
| Top | Bottom | |||||||
| 345-U1415J- | ||||||||
| 3R-1W, 11–13 (Piece 4) | 29 | 15.11 | 15.13 | Orthopyroxene bearing olivine gabbro | 2 | 1 | 70 | Little deformed olivine gabbro |
| 2 | 30 | Cataclastic olivine gabbro | ||||||
| 7G-1W, 28–31 (Piece 5) | 40 (image) | 29.28 | 29.31 | Clinopyroxene oikocryst-bearing gabbronorite | 2 | 1 | 40 | Background |
| Troctolite | 2 | 60 | Background | |||||
| 7G-1W, 91–94 (Piece 14) | 42 (image) | 29.91 | 29.94 | Metatroctolite | 2 | 2 | 70 | Background |
| Troctolite | 1 | 30 | Background | |||||
| 8R-1W, 73–76 (Piece 13) | 47 (image) | 35.63 | 35.66 | Clinopyroxene oikocryst-bearing olivine gabbro | 2 | 1 | 50 | Background |
| Olivine gabbro | 2 | 50 | Halo | |||||
| 8R-2W, 112–115 (Piece 9) | 52 (image) | 37.49 | 37.52 | Olivine gabbro | 2 | 1 | 60 | Background: olivine-bearing gabbro |
| 2 | 40 | Background: olivine gabbro | ||||||
| 8R-2W, 71–74 (Piece 7C) | 50 (image) | 37.08 | 37.11 | Troctolitic gabbro | 2 | 1 | 50 | Background |
| 2 | 50 | Halo | ||||||
| 10R-1W, 53–55 (Piece 6B) | 58 (image) | 55.83 | 55.85 | Clinopyroxene oikocryst gabbro | 2 | 1 | 60 | Troctolite Background |
| 2 | 35 | Clinopyroxene oikocryst | ||||||
| 12R-1W, 115–117 (Piece 15) | 64 (image) | 70.85 | 70.87 | Cataclased gabbro | 2 | 1 | 30 | Background |
| 2 | 70 | Background | ||||||
| 14G-1W, 0–4 (Piece 1) | 68 (image) | 37.00 | 37.04 | Metagabbro | 2 | 1 | 35 | Background |
| 2 | 65 | Halo | ||||||
| 15G-1W, 46–49 (Piece 6) | 69 (image) | 37.92 | 37.95 | Olivine gabbro | 2 | 1 | 75 | Background |
| 2 | 25 | Vein halo | ||||||
| 18R-1W, 141–143 (Piece 17B) | 72 (image) | 85.81 | 85.83 | Metatroctolite | 2 | 1 | 50 | Background |
| 2 | 50 | Halo? | ||||||
| 19R-1W, 64–67 (Piece 10) | 74 (image) | 89.74 | 89.77 | Anorthositic olivine gabbro | 2 | 2 | 40 | Background |
| Dike rock in altered gabbro | 1 | 60 | Background | |||||
| 23R-1W, 10–12 (Piece 3) | 81 (image) | 101.90 | 101.92 | Cataclastic gabbro | 2 | 1 | 10 | Background |
| Sheared dolerite | 2 | 90 | Background | |||||
| 23R-1W, 39–42 (Piece 7) | 82 (image) | 102.19 | 102.22 | Cataclastic metagabbro | 2 | 2 | 30 | Cataclastic zone |
| Metagabbro | 1 | 70 | Background | |||||
| 23R-1W, 52–53 (Piece 8) | 83 (image) | 102.32 | 102.33 | Cataclastic gabbroic rock | 2 | 1 | 50 | Fractured less deformed than Domain 2 |
| 2 | 50 | Zone of more localized deformation | ||||||
| 8R-3W, 26–29 (Piece 5) | 53 (image) | 38.12 | 38.15 | Clinopyroxene oikocryst-bearing troctolite | 3 | 1 | 75 | Background |
| 2 | 5 | Band close to clinopyroxene oikocryst | ||||||
| 3 | 20 | Clinopyroxene oikocryst | ||||||
| 11R-1W, 44–47 (Piece 7) | 60 (image) | 65.44 | 65.47 | Dark highly altered cataclastic gabbro | 3 | 2 | 75 | Background |
| Little altered cataclastic gabbro | 1 | 10 | Cataclasite | |||||
| Pale highly altered cataclastic gabbro | 3 | 15 | Background | |||||
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