Geofluids / 2018 / Article / Tab 2 / Research Article
An Evaluation of the Long-Term Stagnancy of Porewater in the Neogene Sedimentary Rocks in Northern Japan Table 2 Parameters used for the calculation of
4 He production rate, and
3 He/
4 He, and the calculation results. The data from Shibata et al. [
28 ] for the cross section of the reaction with neutrons were used in this study.
Borehole HCD-2 HDB-9 HDB-10 HDB-11 Statistical Depth (m) −73 −136 −220 −289 −314 −318 −77 −267 −460 135 43 −222 390 279 −100 −301 −345 −396 −445 −496 −547 Average Deviation Average Deviation Formation W W W W W W W W W K K W K K W W W W W W W Koetoi Wakkanai Parameters unit Density g/cc 1.53 1.65 1.71 1.62 1.71 1.59 1.30 1.61 1.60 1.11 1.37 1.52 0.86 0.95 1.64 1.63 1.61 1.68 1.55 1.59 1.69 1.12 ±0.22 1.62 ±0.06 Porosity % 0.39 0.34 0.32 0.35 0.32 0.36 0.4767 0.35 0.36 0.53815 0.4441 0.39 0.64025 0.61205 0.34 0.35 0.36 0.33 0.38 0.36 0.32 0.54 ±0.08 0.35 ±0.02 SiO2 % 73.6 70.2 70.6 67.8 67.7 61.3 67.3 69.8 73.2 70.8 72.2 76.2 70.2 69.0 68.3 70.8 72.1 71.0 74.7 74.4 71.3 69.87 ±01.87 70.79 ±3.55 TiO2 % 0.4 0.5 0.5 0.5 0.4 0.5 0.5 0.5 0.5 0.4 0.4 0.4 0.4 0.4 0.5 0.5 0.5 0.5 0.4 0.4 0.5 0.43 ±0.03 0.46 ±0.06 Al2O3 % 8.2 10.6 10.7 9.8 9.4 12.7 9.9 10.3 9.6 9.1 9.0 7.5 7.9 8.9 10.4 10.2 9.5 9.7 8.2 7.5 9.5 8.97 ±0.69 9.61 ±1.32 Fe2O3 % 3.4 3.6 3.5 3.8 3.5 4.4 3.6 3.9 3.4 3.2 3.3 2.9 3.3 3.5 3.9 3.6 3.3 3.4 3.0 2.7 3.3 3.39 ±0.13 3.47 ±0.42 MnO % 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.02 ±0. 0.02 ±0. MgO % 1.2 1.2 1.3 1.2 1.2 1.5 1.3 1.6 1.1 1.1 1.0 0.9 0.9 1.1 1.5 1.3 1.1 1.3 1.0 0.9 1.1 1.07 ±0.16 1.20 ±0.2 CaO % 0.5 0.5 0.5 0.5 0.6 0.7 0.6 0.6 0.4 0.6 0.5 0.5 0.6 0.4 0.5 0.5 0.5 0.5 0.4 0.3 0.3 0.54 ±0.07 0.49 ±0.1 Na2O % 1.2 1.5 1.5 1.4 1.4 1.8 1.3 1.7 1.7 1.5 1.3 1.2 1.2 1.6 1.5 1.4 1.6 1.6 1.4 1.3 1.4 1.38 ±0.16 1.48 ±0.19 K2O % 1.4 1.8 1.8 1.7 1.4 1.8 1.6 1.7 1.6 1.5 1.5 1.3 1.3 1.6 1.8 1.8 1.6 1.7 1.4 1.3 1.6 1.52 ±0.11 1.60 ±0.18 S % 1.3 1.1 1.1 1.0 0.9 1.4 1.0 1.0 1.0 0.9 1.1 0.9 1.0 1.1 1.0 1.1 0.9 0.9 1.0 0.8 1.1 1.02 ±0.1 1.03 ±0.15 C % 1.8 1.7 1.4 1.3 1.4 1.5 1.2 1.3 1.2 1.5 2.0 1.5 1.6 2.2 1.8 1.6 1.4 1.5 1.4 2.6 2.5 1.69 ±0.38 1.62 ±0.39 N % 0.2 N.M. 0.3 0.2 0.2 0.2 0.2 N.M. 0.2 0.3 0.3 0.3 0.3 0.3 0.2 0.2 0.3 0.2 0.2 0.2 0.2 0.26 ±0.02 0.22 ±0.04 Cl ppm 270 380 1,000 910 620 810 80 750 740 880 300 810 730 3,070 1,240 730 1,080 1,050 1,230 1,130 765 1012.00 ±1194.56 844.69 ±276.96 Zr ppm 73 86 84 105 105 126 93 94 84 74 73 59 65 69 87 77 112 98 69 67 84 74.52 ±10.62 87.95 ±17.74 Ga ppm 11 13 14 11 10 17 13 13 12 12 11 10 11 12 14 14 12 12 11 9 12 11.81 ±0.87 12.16 ±1.86 Co ppm 4.8 6.3 6.3 5.1 4.2 5.8 6.1 5.9 5.4 4.9 4.7 4.2 5.2 5.4 6.1 5.9 5.1 5.0 4.9 4.4 5.8 5.25 ±0.54 5.32 ±0.71 B ppm 30 48 44 180 160 200 18 39 36 39 27 43 35 80 54 35 39 38 40 37 38 39.70 ±23.87 66.28 ±57.14 Sr ppm 81 89 88 85 87 110 102 98 87 82 79 64 80 73 88 85 88 89 63 59 69 83.30 ±11.11 83.06 ±13.3 Ba ppm 258 307 289 254 241 293 305 344 328 423 355 267 369 280 322 303 300 301 219 200 236 346.27 ±56.19 278.70 ±41.2 As ppm 8 9 10 10 8 12 9 10 9 10 12 7 15 11 7 10 7 9 7 9 10 11.09 ±02.2 8.80 ±1.4 P ppm 255 260 245 240 270 340 228 390 300 243 280 260 288 280 330 275 240 280 210 240 180 263.67 ±26.57 269.69 ±51.23 Li ppm 25 40 42 38 35 54 39 31 24 41 36 32 44 54 44 33 29 28 22 20 25 42.54 ±07.23 32.44 ±9.19 Be ppm 1.1 1.4 1.4 1.1 1.1 1.6 1.4 1.4 1.3 1.2 1.2 1.1 1.1 1.4 1.5 1.5 1.4 1.4 0.9 0.9 1.2 1.27 ±0.13 1.26 ±0.21 Cr ppm 62 71 66 86 52 63 75 63 59 60 66 48 70 117 74 68 65 61 61 89 76 77.55 ±22.74 66.46 ±10.91 V ppm 67 73 76 68 57 74 68 80 73 67 72 58 73 75 75 77 61 69 62 65 74 70.97 ±03.23 69.28 ±7.05 Ni ppm 33 31 33 34 26 39 31 31 35 33 33 27 32 34 34 29 28 27 28 31 32 32.49 ±01.18 31.16 ±3.5 Cu ppm 25 23 21 30 22 29 23 26 24 34 29 23 62 29 26 22 19 24 19 21 22 35.45 ±15.23 23.45 ±3.26 Zn ppm 80 81 76 70 63 83 74 72 73 82 92 59 86 75 72 80 64 66 94 76 74 81.65 ±07.26 73.77 ±8.76 Rb ppm 64 81 80 69 54 77 75 74 71 65 66 58 62 73 81 80 70 70 62 57 74 68.25 ±05.43 70.07 ±8.85 Y ppm 11 12 12 11 12 17 13 14 12 12 12 11 12 12 13 13 12 14 10 10 12 12.44 ±0.37 12.25 ±1.67 Nb ppm 5.6 7.2 7.1 6.1 5.2 7.2 6.5 6.5 6.2 5.3 5.2 4.9 5.1 6.1 7.0 7.2 6.2 6.1 5.1 4.7 6.2 5.63 ±0.63 6.15 ±0.86 Pb ppm 13 14 14 11 10 16 29 12 15 21 8 6 22 8 13 15 11 11 23 14 12 17.48 ±09.19 12.97 ±3.63 Cd ppm 0.7 0.5 0.4 0.4 0.3 0.5 0.2 0.2 0.3 0.4 0.6 0.3 0.5 0.7 0.3 0.4 0.3 0.4 0.8 0.5 0.4 0.49 ±0.18 0.42 ±0.16 Sm ppm 2.4 2.8 2.5 2.9 2.8 3.6 3.2 3.2 3.0 2.8 2.8 2.5 2.6 2.6 3.0 2.8 2.9 2.9 2.1 1.9 2.4 2.77 ±0.24 2.73 ±0.43 Eu ppm 0.6 0.7 0.7 0.6 0.6 0.7 0.7 0.6 0.4 0.5 0.5 0.4 0.5 0.5 0.6 0.6 0.6 0.6 0.5 0.5 0.6 0.52 ±0.1 0.58 ±0.09 Gd ppm 2.4 2.9 3.0 2.6 2.8 3.5 3.1 2.9 2.3 2.2 2.3 1.9 2.2 2.3 2.7 2.8 2.7 2.8 2.1 2.1 2.6 2.40 ±0.4 2.63 ±0.4 Dy ppm 2.0 2.4 2.5 2.4 2.5 3.1 2.5 2.6 2.1 1.9 2.2 1.7 2.0 2.1 2.4 2.4 2.3 2.5 1.8 1.7 2.2 2.13 ±0.24 2.28 ±0.36 Yb ppm 1.3 1.5 1.4 1.4 1.6 1.7 1.7 1.6 1.4 1.3 1.3 1.1 1.2 1.2 1.5 1.4 1.4 1.4 1.1 1.1 1.4 1.33 ±0.21 1.39 ±0.18 Lu ppm 0.2 0.2 0.2 0.2 0.3 0.3 0.2 0.3 0.2 0.2 0.2 0.1 0.2 0.2 0.2 0.2 0.2 0.2 0.1 0.2 0.2 0.20 ±0. 0.20 ±0.05 Th ppm 6.3 8.0 8.1 6.4 6.0 8.1 7.7 7.0 6.5 6.0 5.8 5.4 5.7 6.6 7.6 8.0 6.9 7.1 6.0 5.4 7.0 6.37 ±0.83 6.85 ±0.92 U ppm 4.4 3.3 2.5 2.5 2.7 3.4 2.4 2.5 3.4 3.4 4.6 2.9 3.7 5.1 3.8 2.9 2.7 3.0 2.9 3.8 3.4 3.82 ±01.02 3.13 ±0.54 Neutron production atms y−1 g−1 4.9 5.0 4.5 3.7 3.9 5.3 3.2 4.0 4.6 3.2 4.6 3.4 2.5 3.8 5.4 4.5 4.0 4.5 3.7 4.3 4.8 3.46 ±0.79 4.42 ±0.58 Macro cross section cm2 cc−1 Neutron flux - He production rate ccSTP/gw/y 3 He/4 He in-situ production-
