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Table T8. Distribution of olivine coronae in thin section, Hole U1415J.

Core, section,
interval (cm)
Thin section number Depth (mbsf) Lithology Corona
(%)
Total olivine alteration
(%)
Top Bottom
345-U1415J-
3R-1W, 11–13 (Piece 4) 29 15.11 15.13 Olivine gabbro 15 90
3R-1W, 22–24 (Piece 6) 30 15.22 15.24 Olivine gabbro 2 100
3R-1W, 45–48 (Piece 10) 31 15.45 15.48 Gabbro 15 50
3R-1W, 73–75 (Piece 14) 32 15.73 15.75 Olivine gabbro 10 80
5R-1W, 62–64 (Piece 12) 36 26.82 26.84 Clinopyroxene oikocryst-bearing
olivine gabbro
8 40
5R-1W, 117–120 (Piece 17B) 37 27.37 27.4 Clinopyroxene oikocryst-bearing
olivine gabbro
0 50
5R-1W, 138–141 (Piece 18) 38 27.58 27.61 Olivine gabbro 0 20
5R-2W, 60–63 (Piece 3) 39 28.235 28.265 Olivine-bearing gabbronorite 0 15
7G-1W, 28–31 (Piece 5) 40 29.28 29.31 Clinopyroxene oikocryst-bearing
troctolite
20 40
7G-1W, 35–38 (Piece 6) 41 29.35 29.38   10 70
7G-1W, 55–56 (Piece 8) 45 29.55 29.56 Clinopyroxene oikocryst-bearing
olivine gabbro
0 25
7G-1W, 84–87 (Piece 13) 43 29.84 29.87 Oikocryst-bearing gabbro 10 100
7G-1W, 91–94 (Piece 14) 42 29.91 29.94 Oikocryst-bearing gabbro 30 90
8R-1W, 34–37 (Piece 7) 46 35.24 35.27 Clinopyroxene oikocryst troctolite 10 100
8R-1W, 73–76 (Piece 13) 47 35.63 35.66 Oikocryst gabbro 0 70
8R-1W, 79–82 (Piece 13) 49 35.69 35.72 Oikocryst gabbro 0 40
8R-2W, 71–74 (Piece 7C) 50 37.08 37.11 Clinopyroxene oikocryst troctolite 0 100
8R-2W, 79–82 (Piece 8) 51 37.16 37.19 Clinopyroxene oikocryst troctolite 0 25
8R-2W, 112–115 (Piece 9) 52 37.49 37.52 Clinopyroxene oikocryst troctolite 0 30
8R-3W, 26–29 (Piece 5) 53 38.12 38.15 Clinopyroxene oikocryst troctolite 0 25
8R-3W, 35–38 (Piece 6) 54 38.21 38.24 Olivine gabbro 10 95
8R-3W, 83–86 (Piece 9B) 55 38.69 38.72 Olivine gabbro 0 25
8R-3W, 129–132 (Piece 14A) 57 39.15 39.18 Olivine gabbro 15 100
9R-1W, 46–49 (Piece 7) 48 45.66 45.69 Olivine-bearing gabbro 10 100
10R-1W, 53–55 (Piece 6B) 58 55.83 55.85 Troctolite 0 25
11R-1W, 22–24 (Piece 4) 59 65.22 65.24 Troctolite 0 25
12R-1W, 86–89 (Piece 12) 62 70.56 70.59 Olivine gabbro 0 100
12R-1W, 94–96 (Piece 13) 63 70.64 70.66 Olivine gabbro 5 100
12R-1W, 115–117 (Piece 15) 64 70.85 70.87 Olivine gabbro 40 100
13R-1W, 26–29 (Piece 4B) 65 74.96 74.99 Troctolite 30 100
13R-1W, 39–41 (Piece 6) 66 75.09 75.11 Troctolite 5 40
13R-1W, 53–56 (Piece 7) 67 75.23 75.26 Troctolite 10 100
15G-1W, 46–49 (Piece 6) 69 80.32 80.35 Troctolite 0 50
18R-1W, 49–52 (Piece 7) 70 84.89 84.92 Troctolite 60 100
18R-1W, 67–69 (Piece 9) 71 85.07 85.09 Chromitite 100 100
18R-1W, 141–143 (Piece 17B) 72 85.81 85.83 Troctolite 2 85
19R-1W, 18–19 (Piece 3) 73 89.28 89.29 Troctolite 2 60
19R-1W, 64–67 (Piece 10) 74 89.74 89.77 Cataclasite 5 100
21R-1W, 13–15 (Piece 3) 76 98.93 98.95 Chromitite 100 100
21R-1W, 58–59 (Piece 9) 78 99.38 99.39 Olivine gabbro 10 100
21R-1W, 103–107 (Piece 14) 79 99.83 99.87 Olivine gabbro 25 100
21R-1W, 118–121 (Piece 16) 80 99.98 100.01 Olivine gabbro 5 100
23R-1W, 39–42 (Piece 7) 82 102.19 102.22 Olivine gabbro 40 100
23R-1W, 52–53 (Piece 8) 83 102.32 102.33 Olivine gabbro 0 100
25G-1W, 11–15 (Piece 2) 84 103.91 103.95 Oikocryst gabbro 5 100
25G-1W, 32–35 (Piece 5) 85 104.12 104.15 Clinopyroxene oikocryst gabbro 20 40

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