Table T16. Total carbon, inorganic carbon, carbonate, total organic carbon, and total nitrogen concentrations and carbon/nitrogen ratios, Site 1260.
Hole, core, section,
interval (cm)
Depth
(mbsf)
TC
(wt%)
IC
(wt%)
CaCO3
(wt%)
TOC
(wt%)
N
(wt%)
C/N
(atomic)
207-






Unit I (nannofossil clay):




1260A-1R-1, 15–16 0.15 1.32 1.24 10.3 0.08 0.04 2.4
Unit II (nannofossil chalk):




1260A-2R-1, 68–69 1.68
5.21 43.4


1260A-2R-2, 9–10 2.59 7.45 7.50 62.5 0.00 0.01 0.0
1260A-2R-2, 113–114 3.63
9.26 77.1


1260A-3R-1, 11–12 10.41
9.06 75.5


1260A-3R-2, 10–11 11.90 8.64 8.73 72.7 0.00 0.02 0.0
1260A-3R-3, 92–93 14.22
7.79 64.9


1260A-4R-3, 73–74 23.23
8.57 71.4


1260A-4R-5, 73–74 26.23 8.67 8.44 70.3 0.23 0.02 12.7
1260A-6R-1, 62–63 38.82
9.24 77.0


1260A-6R-3, 137–138 42.57 7.07 7.01 58.4 0.06 0.01 6.2
1260A-6R-6, 23–24 45.43
8.66 72.1


1260A-7R-2, 16–17 49.16
9.35 77.9


1260A-7R-4, 20–21 52.20 9.91 9.87 82.2 0.04 0.01 4.4
1260A-8R-1, 49–50 57.69
9.82 81.8


1260A-8R-6, 26–27 64.96 8.73 8.60 71.6 0.13 0.01 10.9
1260A-9R-1, 82–83 67.72
9.95 82.9


1260A-9R-3, 89–90 70.79
9.30 77.5


1260A-9R-5, 86–87 73.76 9.16 8.93 74.4 0.23 0.02 14.5
1260A-9R-7, 66–67 76.56
8.85 73.8


1260A-10R-1, 83–84 77.43
8.39 69.9


1260A-10R-3, 48–49 80.08
9.00 75.0


1260A-10R-5, 72–73 83.32 9.07 8.98 74.8 0.09 0.01 9.3
1260A-11R-2, 80–81 88.60
9.93 82.7


1260A-11R-4, 78–79 91.58
9.43 78.6


1260A-11R-6, 84–85 94.64 9.06 9.02 75.1 0.04 0.01 5.4
1260A-12R-1, 62–63 96.52
8.69 72.4


1260A-12R-3, 99–100 99.89
7.90 65.8


1260A-12R-5, 60–61 102.50 8.45 8.47 70.6 0.00 0.01 0.0
1260A-13R-2, 64–64 107.74
8.19 68.2


1260A-13R-4, 64–64 110.74
8.68 72.3


1260A-13R-6, 64–64 113.74 8.75 8.69 72.4 0.06 0.01 5.2
1260A-14R-2, 75–76 117.55
8.54 71.1


1260A-14R-4, 73–74 120.53
8.77 73.1


1260A-14R-6, 75–76 123.55 8.44 8.37 69.8 0.07 0.01 12.5
1260A-15R-1, 70–71 125.60
9.14 76.2


1260A-15R-3, 69–70 128.59 8.92 8.82 73.5 0.10 0.01 14.0
1260A-16R-1, 42–43 134.92 9.49 9.45 78.7 0.04 0.01 3.5
1260A-17R-2, 69–70 146.39 9.51 9.56 79.6 0.00 0.00 0.0
1260A-18R-1, 69–70 154.19
8.81 73.4


1260A-18R-5, 70–71 160.20 9.16 9.14 76.1 0.02 0.01 2.1
1260A-19R-1, 70–71 163.90
8.27 68.9


1260A-19R-5, 70–71 169.90 8.23 8.45 70.4 0.00 0.02 0.0
1260A-20R-2, 76–77 175.06
8.63 71.9


1260A-20R-5, 77–78 179.57 8.49 8.50 70.8 0.00 0.02 0.0
1260A-21R-1, 7–8 182.57 7.53 7.54 62.8 0.00 0.02 0.0
1260A-23R-1, 92–93 202.32
7.62 63.5


1260A-23R-3, 69–71 205.09 8.23 8.09 67.4 0.14 0.03 5.7
1260A-24R-1, 110–111 212.20
7.66 63.9


1260A-24R-3, 63–64 214.53
6.16 51.3


1260A-24R-5, 88–89 217.67 7.83 7.74 64.5 0.09 0.23 0.4
1260A-25R-1, 127–128 221.97
8.18 68.2


1260A-25R-4, 1–2 225.21
5.79 48.2


1260A-25R-6, 71–72 228.71 7.33 7.34 61.2 0.00 0.03 0.0
1260A-26R-1, 120–121 231.50
6.35 52.9


1260A-26R-5, 19–20 236.49 6.65 6.59 54.9 0.06 0.03 2.7
1260A-26R-7, 59–60 239.39
6.72 56.0


1260A-27R-1, 75–76 240.75
7.15 59.5


1260A-27R-3, 74–75 243.74
7.54 62.8


1260A-27R-5, 71–72 246.71
7.08 59.0


1260A-27R-7, 19–20 248.89 7.50 7.41 61.7 0.09 0.03 3.8
1260A-28R-2, 75–76 251.66
6.04 50.3


1260A-28R-4, 75–76 254.62
7.48 62.3


1260A-28R-6, 75–75 256.93 7.28 7.17 59.7 0.11 0.03 4.2
1260A-28R-8, 50–51 259.14
7.19 59.9


1260A-29R-2, 69–70 260.88
7.23 60.2


1260A-29R-4, 75–76 263.84
6.59 54.9


1260A-29R-6, 14–15 265.64 6.60 6.43 53.6 0.17 0.03 7.2
1260A-30R-1, 67–68 269.57
7.59 63.2


1260A-30R-3, 67–68 272.49
5.84 48.7


1260A-30R-5, 59–60 275.02 6.80 6.74 56.1 0.06 0.00 15.6
Unit III (foraminifer to clayey nannofossil chalk):



1260A-30R-8, 72–73 278.22
4.92 41.0


1260B-17R-7, 69–69.1 279.84 0.18 0.10 0.9 0.08 0.03 2.9
1260A-31R-2, 49–50 280.28
6.48 54.0


1260A-31R-4, 64–65 283.22 6.59 6.57 54.7 0.02 0.05 0.5
1260A-31R-6, 66–67 286.24
6.51 54.2


1260A-32R-1, 68–69 288.88
5.01 41.7


1260B-19R-1, 138–139 291.48 0.00 6.56 54.7


1260A-32R-3, 29–30 291.49 6.52 6.35 52.9 0.17

1260B-19R-3, 52–53 293.62 7.14 6.98 58.2 0.16 0.02 8.4
1260B-20R-1, 29–30 300.09 0.00 3.21 26.7


1260B-20R-1, 135–136 301.15 0.00 4.52 37.6


1260B-20R-3, 59–60 303.39 6.21 6.03 50.3 0.18 0.27 0.8
1260B-20R-6, 66–67 307.94 0.00 6.42 53.5


1260B-21R-2, 94–95 311.84 0.00 5.33 44.4


1260B-21R-4, 13–14 314.05 6.11 5.91 49.3 0.20 0.03 7.4
1260A-35R-1, 78–79 317.88
5.38 44.8


1260B-21R-7, 1–2 318.45 0.00 6.72 56.0


1260A-35R-3, 86–87 320.96 6.46 6.56 54.6 0.00 0.01
1260B-22R-4, 2–3 323.62 9.42 9.28 77.3 0.14 0.01 11.3
1260A-35R-5, 116–117 324.26
10.30 85.8


1260A-35R-7, 30–31 326.40
9.09 75.7


1260B-23R-1, 110–111 329.80 0.00 6.77 56.4


1260B-23R-6, 63–64 336.63 8.95 8.83 73.6 0.12 0.01 13.4
1260B-24R-3, 116–117 342.56 9.26 9.12 75.9 0.14 0.01 13.6
1260A-37R-5, 90–91 343.30 9.32 9.38 78.1 0.00 0.00
1260A-37R-5, 109–110 343.49
6.75 56.2


1260A-38R-1, 114–115 347.14
9.47 78.9


1260A-38R-4, 70–71 351.20 6.10 6.05 50.4 0.05 0.01 4.8
1260A-38R-6, 10–11 353.60
6.29 52.4


1260A-39R-1, 2–3 355.62
6.11 50.9


1260A-39R-3, 73–74 359.33 5.72 5.51 45.9 0.21 0.01 17.7
1260A-39R-5, 115–116 362.75
5.44 45.3


1260A-39R-6, 88–89 363.98
6.89 57.4


1260B-27R-1, 8–9 367.38 0.00 7.36 61.3


1260A-40R-3, 40–41 368.70 9.30 9.27 77.2 0.03 0.00 8.9
1260A-40R-4, 0–5 369.80 6.16 6.18 51.5 0.00 0.01
1260B-27R-5, 107–108 374.37 7.40 7.27 60.5 0.13 0.02 9.0
1260A-41R-1, 67–68 375.57 8.39 8.37 69.7 0.02 0.01 3.5
1260B-28R-1, 72–72 377.62 5.49 5.31 44.3 0.18 0.02 9.9
1260B-28R-1, 149–150 378.39 5.50 5.34 44.5 0.16 0.03 6.7
1260A-41R-4, 0–5 379.40 3.95 3.94 32.8 0.01 0.01 1.3
1260B-29R-2, 0–1 383.00 3.91 3.71 30.9 0.20 0.05 5.1
1260B-29R-2, 0–1 383.00 4.04 3.71 30.9 0.33 0.04 9.4
1260B-29R-2, 49–50 383.49 0.00 3.60 30.0


1260B-29R-3, 59–60 385.09 4.60 4.21 35.0 0.39 0.04 11.8
1260A-42R-1, 73–74 385.23
3.94 32.9


1260A-42R-2, 0–5 386.00 3.50 3.43 28.5 0.07 0.00
1260B-30R-1, 72–73 387.22 3.35 3.17 26.4 0.18 0.02 11.9
1260A-42R-2, 127–128 387.27
4.18 34.8


1260B-30R-1, 145–150 387.95 4.06 3.93 32.7 0.13 0.02 6.2
1260A-42R-4, 55–56 389.55 5.39 5.15 42.9 0.24 0.02 15.1
Unit IV (laminated black shale):




1260B-31R-1, 145–150 392.55 14.47 6.48 53.9 7.99 0.30 31.0
1260A-43R-1, 62–63 394.72 9.02 3.20 26.7 5.82 0.20 34.5
1260A-43R-2, 0–5 395.38 19.94 6.02 50.1 13.92 0.43 37.7
1260A-43R-2, 95–96 396.33 15.57 6.36 53.0 9.21 0.29 37.5
1260B-32R-2, 90–93 398.44 13.79 7.23 60.2 6.56 0.24 31.5
1260B-33R-1, 145–150 402.15 16.99 5.50 45.8 11.49 0.40 33.9
1260B-33R-2, 56–57 402.76 14.98 5.00 41.7 9.98 0.37 31.4
1260A-44R-2, 0–5 405.20 11.77 5.49 45.7 6.28 0.22 34.1
1260A-44R-3, 32–33 407.02 15.16 4.50 37.5 10.66 0.40 30.9
1260A-44R-4, 88–89 408.38 13.86 5.63 46.9 8.23 0.30 31.5
1260B-34R-3, 0–5 408.70 15.13 2.26 18.9 12.87 0.53 28.2
1260A-45R-1, 107–108 409.77 12.74 10.94 91.2 1.80 0.05 42.3
1260A-45R-1, 148–150 410.18 10.18 5.75 47.9 4.43 0.16 33.1
1260A-45R-2, 10–11 410.30 12.42 4.80 40.0 7.62 0.30 30.1
1260B-34R-5, 25–26 411.95 11.53 1.28 10.7 10.25 0.39 30.5
1260A-46R-1, 38–39 414.68 14.82 3.58 29.8 11.24 0.43 30.6
1260A-46R-3, 118–119 418.12 13.35 0.46 3.8 12.89 0.52 28.9
1260A-46R-4, 0–5 418.28 13.77 0.78 6.5 12.99 0.54 28.2
1260B-35R-3, 0–5 418.30 11.97 9.00 75.0 2.97 0.16 21.4
1260A-46R-4, 66–67 418.94 14.75 2.29 19.1 12.46 0.50 29.3
1260B-35R-5, 16–16 421.41 14.40 1.25 10.4 13.15 0.41 37.3
1260A-46R-6, 43–44 421.50 14.35 3.36 28.0 10.99 0.42 30.2
1260B-36R-1, 61–62 425.51 15.75 7.53 62.7 8.22 0.31 31.0
1260B-36R-3, 0–5 427.90 14.65 6.25 52.1 8.40 0.34 29.0
1260A-47R-5, 143–145 431.31 15.75 5.26 43.8 10.49 0.39 31.7
1260B-36R-6, 14–15 432.54 15.41 5.33 44.4 10.08 0.40 29.2
1260B-36R-6, 91–92 433.31 12.35 11.58 96.4 0.77 0.03 35.6
1260A-48R-1, 2–3 433.52 15.56 4.81 40.1 10.75 0.41 30.3
1260A-48R-3, 0–2 436.40 13.06 10.31 85.9 2.75 0.12 27.0
1260A-48R-3, 111–112 437.51 14.48 5.50 45.8 8.98 0.35 30.2
1260B-37R-5, 0–5 440.50 15.13 6.11 50.9 9.02 0.35 29.6
1260A-48R-6, 99–100 441.67 18.05 6.37 53.1 11.68 0.41 33.0
1260A-49R-2, 39–40 444.92 13.80 5.39 44.9 8.41 0.28 35.7
1260B-38R-2, 0–2 445.60 15.99 7.05 58.7 8.94 0.29 35.6
1260A-49R-4, 0–2 447.45 12.88 10.75 89.5 2.13 0.07 38.2
1260A-49R-5, 82–83 449.77 12.91 10.36 86.3 2.55 0.06 50.0
1260B-38R-CC, 4–5 452.33 16.76 5.72 47.6 11.04 0.39 33.4
1260A-50R-1, 43–44 453.13 17.77 7.19 59.9 10.58 0.33 37.1
1260B-39R-2, 0–2 455.20 16.28 8.18 68.2 8.10 0.26 35.9
1260A-50R-4, 68–69 457.88 12.30 10.68 89.0 1.62 0.04 52.0
1260A-50R-5, 0–2 458.70 15.07 8.96 74.7 6.11 0.20 36.6
1260A-50R-7, 29–30 461.49 14.41 8.85 73.7 5.56 0.23 28.1
1260B-39R-7, 7–8 462.77 56.69 0.79 6.6 55.90 0.80 81.5
1260A-51R-4, 12–13 466.60 12.55 5.15 42.9 7.40 0.26 33.3
1260A-51R-5, 4–5 468.02 12.53 10.36 86.3 2.17 0.05 47.8
1260A-51R-5, 146–148 469.44 15.79 8.04 66.9 7.75 0.26 35.5
1260B-40R-CC, 15–16 470.90 14.61 10.03 83.5 4.58 0.12 44.7
1260A-52R-2, 29–30 473.39 12.46 10.55 87.9 1.91 0.05 43.8
1260B-41R-2, 0–2 474.20 14.02 5.18 43.1 8.84 0.27 38.4
1260A-52R-4, 0–2 476.08 13.08 9.74 81.1 3.34 0.17 23.1
1260A-52R-4, 50–51 476.58 16.09 7.01 58.4 9.08 0.31 34.3
1260B-41R-4, 18–19 477.38 16.11 7.16 59.7 8.95 0.32 33.0
1260B-42R-1, 29–30 482.59 7.06 5.44 45.3 1.62 0.06 29.5
1260A-53R-1, 143–145 482.73 7.23 5.19 43.2 2.04 0.06 41.8
1260A-53R-1, 145–146 482.75 6.84 5.38 44.9 1.46 0.04 40.7
Unit V (silty calcareous claystone):




1260A-53R-2, 66–67 483.46 1.51 1.06 8.8 0.45 0.01 37.2
1260B-42R-2, 138–139 484.96 1.59 1.03 8.6 0.56 0.03 20.3
1260B-42R-3, 21–22 485.18 1.43 0.93 7.8 0.50 0.03 21.1
1260A-54R-1, 149–150 489.39 1.57 1.09 9.1 0.48 0.02 29.5
1260B-43R-2, 0–2 489.40 1.65 0.01 0.1 1.64 0.03 56.2
1260A-54R-2, 70–71 490.10 1.47 1.01 8.4 0.46 0.01 44.7
1260B-44R-1, 88–89 492.78 1.80 1.32 11.0 0.48 0.03 19.1
1260B-44R-2, 0–2 493.37 1.43 1.02 8.5 0.41 0.02 19.5
1260B-45R-1, 80–81 497.30 1.68 1.07 8.9 0.61 0.03 21.5
1260B-45R-1, 148–150 497.98 1.41 1.00 8.4 0.41 0.03 17.6
1260B-46R-2, 80–81 503.80 1.53 1.11 9.3 0.42 0.03 18.4
1260B-46R-2, 145–150 504.45 1.68 1.02 8.5 0.66 0.04 20.3
1260B-46R-4, 60–61 506.60 1.95 1.29 10.8 0.66 0.04 20.6

Notes: TC = total carbon, IC = inorganic carbon, TOC = total organic carbon. Atomic C/N ratios are calculated from concentrations of organic carbon and total nitrogen.