Table T20. Results of Rock-Eval pyrolysis analyses of selected sediment samples, Hole 1237B.
Core, section,
interval (cm)
Depth
TOC
(wt%)
S1
(mg/g)
S2
(mg/g)
Tmax
(°)
HI
(mg HC/g C)
(mbsf)
(mcd)
202-1237B-






1H-1, 74-75 0.74 0.74 1.91 0.22 4.34 416 227
1H-2, 74-75 2.25 2.25 1.83 0.20 4.14 419 226
1H-3, 74-75 3.75 3.75 0.95 0.09 1.30 380 136
2H-1, 74-75 6.24 5.39 0.65 0.09 0.87 399 133
2H-3, 74-75 9.26 8.41 1.70 0.14 3.41 423 200
2H-5, 74-75 12.27 11.42 0.92 0.07 1.12 404 121
3H-1, 74-75 15.74 16.84 0.94 0.09 1.54 407 163
3H-3, 74-75 18.76 19.86 1.59 0.19 3.13 407 196
3H-4, 74-75 20.27 21.37 0.64 0.05 0.73 382 114
3H-7, 20-21 24.27 25.37 1.40 0.09 1.66 408 118

Notes: TOC = total organic carbon. S1 = amount of volatile hydrocarbons, S2 = amount of hydrocarbons due to thermal cracking of kerogen. Tmax = peak temperature of kerogen breakdown. HI = hydrogen index (100 x S2/TOC).