Table T14. Total carbon, inorganic carbon, carbonate, total organic carbon, and total nitrogen concentrations and carbon/nitrogen ratios, Site 1261.
Hole, core, section,
interval (cm)
Depth
(mbsf)
TC
(wt%)
IC
(wt%)
CaCO3
(wt%)
TOC
(wt%)
N
(wt%)
C/N
(atomic)
207-






Unit I (nannofossil ooze and clay):




1261A-1R-1, 13–14 0.13
5.00 41.63


1261A-1R-2, 48–49 1.98 1.68 1.17 9.74 0.51 0.07 8.94
1261A-2R-1, 49–50 4.39 1.21 0.72 6.01 0.49 0.06 9.13
1261A-3R-1, 70–71 13.90 1.96 1.80 14.98 0.16 0.04 4.29
1261A-4R-2, 69–70 71.89 1.91 1.68 13.99 0.23 0.05 5.17
1261A-5R-2, 48–49 133.38
1.86 15.53


1261A-5R-5, 49–50 137.89 2.35 2.16 17.95 0.19 0.06 3.92
1261A-6R-2, 64–65 191.24
2.59 21.58


1261A-6R-6, 63–64 197.24 3.37 3.18 26.49 0.19 0.06 3.98
1261A-7R-1, 74–75 237.64
2.24 18.64


1261A-7R-4, 75–76 242.15 2.23 1.98 16.49 0.25 0.05 5.34
1261A-8R-1, 35–36 246.85
2.83 23.60


1261A-8R-3, 73–74 250.23
1.81 15.06


1261A-8R-6, 72–73 254.72 2.10 1.68 14.02 0.42 0.09 5.53
1261A-9R-2, 75–76 258.45
2.69 22.43


1261A-9R-4, 75–76 261.45 1.60 1.42 11.86 0.18 0.08 2.54
1261A-10R-1, 75–76 266.55 3.54 3.37 28.04 0.17 0.05 4.19
1261A-10R-4, 75–76 271.05
2.12 17.65


1261A-11R-2, 75–76 277.65 3.02 2.86 23.85 0.16 0.05 3.73
1261A-11R-4, 76–77 280.66
2.68 22.33


1261A-12R-2, 90–91 287.50 3.65 3.48 28.95 0.17 0.05 4.17
1261A-13R-2, 79–81 296.99
3.37 28.09


1261A-13R-4, 63–65 299.83 3.23 2.98 24.85 0.25 0.04 6.55
1261A-13R-6, 78–80 302.98
3.47 28.93


1261A-14R-1, 65–66 305.05
2.97 24.70


1261A-14R-4, 74–75 309.64 3.27 3.01 25.07 0.26 0.05 6.47
1261A-15R-3, 70–71 317.70 3.88 3.76 31.29 0.12 0.04 3.01
1261A-16R-1, 55–56 324.15
6.60 55.01


1261A-16R-3, 80–81 327.40
6.73 56.03


1261A-16R-5, 80–81 330.40 7.15 6.91 57.58 0.24 0.01 21.29
1261A-17R-3, 70–71 337.00
7.51 62.58


1261A-17R-6, 80–81 341.60 3.30 3.15 26.23 0.15 0.05 3.57
1261A-18R-3, 109–110 346.99
4.33 36.06


1261A-18R-6, 108–109 351.48 5.46 5.18 43.16 0.28 0.04 9.06
1261A-19R-1, 115–116 353.65
8.10 67.44


1261A-19R-2, 83–84 354.83
9.39 78.22


1261A-19R-4, 51–52 357.31
6.18 51.48


1261A-19R-6, 70–71 360.50 6.18 6.10 50.80 0.08 0.01 7.38
1261A-20R-5, 87–88 368.97
5.79 48.20


Unit II (calcareous chalk with clay):




1261A-20R-5, 140–142 369.50
10.02 83.50


1261A-20R-7, 40–41 371.40 9.29 9.22 76.84 0.07 0.01 7.50
1261A-21R-1, 73–74 372.53
9.65 80.36


1261A-21R-2, 9–10 373.37 8.87 8.56 71.33 0.31 0.03 14.14
1261A-22R-1, 23–24 381.63
9.95 82.91


1261A-22R-2, 54–55 383.44 8.32 8.28 69.01 0.04 0.00 12.35
1261A-23R-1, 93–94 392.03
9.89 82.36


1261A-23R-4, 64–65 396.24
9.57 79.69


1261A-23R-6, 39–40 398.99 7.99 8.02 66.84 0.00 0.01
1261A-24R-2, 14–15 402.34
9.58 79.81


1261A-24R-5, 16–17 406.36 8.60 8.45 70.37 0.15 0.00 73.28
1261A-25R-3, 83–84 413.97
9.83 81.86


1261A-25R-5, 53–54 416.67 9.97 10.08 83.93
0.00
1261A-26R-1, 73–74 420.63
10.28 85.63


1261A-26R-3, 38–39 422.88 7.79 7.79 64.86 0.00 0.01 0.33
1261A-27R-1, 132–133 430.82
7.59 63.24


1261A-27R-3, 71–72 433.21 9.09 9.14 76.16 0.00 0.00
1261A-28R-1, 94–95 440.04
9.39 78.23


1261A-28R-6, 107–108 446.77
9.42 78.43


1261A-28R-7, 72–73 447.92 9.06 8.95 74.54 0.11 0.07 1.86
1261A-29R-1, 23–24 448.93
8.04 66.93


1261A-29R-3, 10–11 451.80 10.11 10.12 84.32 0.00 0.00
1261A-30R-1, 50–51 458.80 9.49 9.61 80.03 0.00 0.00
1261A-32R-2, 87–88 479.57
8.03 66.86


1261A-32R-5, 83–84 484.03 7.46 7.42 61.83 0.04 0.01 6.84
1261A-33R-1, 97–98 487.77 7.15 7.19 59.88 0.00 0.01 0.00
Unit III (clayey calcareous chalk):




1261A-34R-1, 91–92 497.41
5.72 47.61


1261A-34R-4, 116–117 502.18 3.86 3.78 31.47 0.08 0.02 3.87
1261A-35R-1, 89–90 506.99
6.29 52.43


1261A-35R-3, 88–89 509.98 5.74 5.71 47.52 0.03 0.01 3.02
1261A-35R-5, 27–28 512.37
5.94 49.48


1261A-36R-1, 58–59 516.28
6.35 52.91


1261A-36R-5, 71–72 522.45 4.37 4.45 37.09 0.00 0.02 0.00
1261A-37R-1, 62–63 525.92
8.71 72.58


1261A-37R-5, 70–71 532.00 6.61 6.61 55.03 0.00 0.01 0.06
1261A-39R-1, 74–75 545.34
9.26 77.11


1261A-39R-3, 74–75 548.34 6.36 6.30 52.48 0.06 0.01 5.66
1261A-40R-3, 34–35 557.50 6.02 5.94 49.44 0.08 0.01 16.04
1261A-40R-4, 117–118 559.83
2.07 17.25


1261A-40R-5, 31–32 560.47
2.22 18.52


1261A-41R-1, 32–33 564.12
5.20 43.29


Unit IV (laminated black shales):




1261A-41R-3, 126–127 568.06 12.25 11.21 93.36 1.04 0.03 40.06
1261A-41R-3, 144–145 568.24 14.82 6.49 54.07 8.33 0.30 32.36
1261B-6R-1, 33–34 568.73 13.59 5.83 48.58 7.76 0.29 31.59
1261A-41R-6, 71–72 572.01 12.46 2.39 19.89 10.07 0.43 27.13
1261A-41R-CC, 21–22 573.69 14.36 7.61 63.40 6.75 0.30 25.99
1261B-6R-5, 123–124 575.63 13.82 5.60 46.65 8.22 0.28 33.96
1261A-42R-5, 2–3 579.29 14.99 4.48 37.32 10.51 0.43 28.64
1261B-7R-2, 37–38 579.85 15.31 6.08 50.68 9.23 0.30 36.00
1261A-42R-6, 124–125 582.01 16.01 6.74 56.12 9.27 0.30 35.83
1261B-7R-4, 36–37 582.84 16.31 4.95 41.20 11.36 0.42 31.19
1261A-43R-3, 47–48 586.44 5.32 2.56 21.35 2.76 0.14 23.38
1261A-43R-CC, 1–2 589.99 14.07 5.60 46.65 8.47 0.26 38.02
1261B-8R-2, 101–102 590.11 20.81 4.72 39.34 16.09 0.40 47.05
1261A-44R-2, 3–4 594.13 11.97 4.93 41.12 7.04 0.25 32.49
1261B-9R-1, 63–64 597.83 16.48 5.69 47.38 10.79 0.33 38.47
1261A-44R-5, 10–11 598.44 15.32 5.83 48.59 9.49 0.29 37.92
1261A-44R-6, 23–24 600.07 13.16 4.63 38.59 8.53 0.30 32.99
1261B-9R-5, 66–67 603.81 16.11 5.50 45.80 10.61 0.34 36.04
1261A-45R-2, 103–104 604.53 16.10 5.42 45.21 10.68 0.37 34.10
1261A-45R-3, 2–3 605.00 16.61 5.22 43.46 11.39 0.37 35.88
1261A-45R-4, 27–28 606.77 13.37 6.61 55.04 6.76 0.22 36.64
1261B-10R-3, 38–39 610.18 14.90 3.92 32.66 10.98 0.40 32.08
1261A-46R-2, 1–2 613.22 13.46 7.07 58.86 6.39 0.20 37.42
1261A-46R-2, 91–92 614.12 17.54 5.50 45.82 12.04 0.38 36.66
1261A-46R-5, 16–17 617.80 13.82 5.09 42.44 8.73 0.29 35.31
1261B-11R-2, 90–91 618.80 9.56 0.11 0.92 9.45 0.33 33.14
1261A-47R-2, 1–2 622.80 12.74 0.37 3.11 12.37 0.45 32.07
1261A-47R-4, 137–138 627.09 13.11 1.29 10.71 11.82 0.43 31.96
1261A-48R-2, 47–48 632.97 19.34 6.45 53.75 12.89 0.38 40.03
1261A-48R-5, 73–74 637.68 17.51 1.75 14.54 15.76 0.44 41.91
1261A-49R-3, 32–33 643.90 14.60 5.41 45.04 9.19 0.30 35.87
1261A-49R-6, 113–114 649.21 15.56 4.89 40.74 10.67 0.35 35.36
1261A-50R-3, 12–13 653.32 12.12 11.70 97.44 0.42 0.02 22.65
1261A-50R-3, 17–19 653.37 14.89 4.16 34.66 10.73 0.36 34.74
Unit V (quartz sandstone):




1261B-16R-1, 99–100 665.49 1.46 0.45 3.76 1.01 0.03 38.35

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.