Aka et al. (2008) U-series dating of Lake Nyos maar basalts, Cameroon (West Africa): Implications for potential hazards on the Lake Nyos dam, Journal of Volcanology and Geothermal Research, 176, 212-224, doi:10.1016/j.jvolgeores.2008.04.009. < 20100403101829780.admin > pub
Table 2. Major elements, trace elements and U-Th-Ra data for Lake Nyos and representative Mt.Cameroon lavas < 20190528113204-132006 > pub
measured unit D20 D21 D26 D27 D31 BS14 BS16 MS19A MS19B TS8 YF3 YF4B 1909-2 CA060 CA04 1982-1 CA076 2000-1
[SiO2] a cg/g 47.3 47.8 49.92 50.11 47.8 46.4 47.4 47.9 47.5 47.3 46.5 47.3 45.54 43.51 46.3 44.69 46.19 45.43
[TiO2] a cg/g 2.8 2.73 1.4 1.25 2.74 2.8 2.76 2.86 2.78 2.81 2.83 2.82 3.43 3.42 3.31 3.53 3.25 3.3
[Al2O3] a cg/g 15.19 14.91 15.25 15.4 15.01 14.67 15.1 15.29 15.2 15.29 15.32 15.1 15.78 12.48 16.03 15.03 15.52 15.09
[Fe2O3T] a cg/g 12.4 12.2 13.7 13.4 12.2 12.1 12.3 12.0 12.4 12.3 12.0 12.3 12.5 14.0 11.9 13.6 12.3 12.8
[MnO] a cg/g 0.18 0.18 0.22 0.19 0.18 0.18 0.18 0.17 0.18 0.18 0.18 0.18 0.21 0.21 0.2 0.2 0.2 0.2
[MgO] a cg/g 7.49 7.89 7.29 7.67 7.77 8.2 7.69 7.14 7.53 7.34 7.85 7.78 5.58 10.04 5.26 6.09 6.03 6.42
[CaO] a cg/g 8.2 8.5 9.3 9.3 8.3 8.7 8.3 8.2 8.3 8.2 9.2 8.4 10.6 11.9 10.1 11.8 10.6 10.9
[Na2O] a cg/g 4.35 3.92 3.0 2.99 4.27 3.77 4.27 4.31 4.48 4.42 4.57 4.03 4.18 3.31 4.49 3.59 4.2 3.91
[K2O] a cg/g 1.86 1.73 0.37 0.33 1.83 1.88 1.8 1.84 1.72 1.87 1.95 1.8 1.68 1.48 1.82 1.35 1.67 1.55
[P2O5] a cg/g 0.86 0.8 0.14 0.13 0.83 0.8 0.86 0.79 0.87 0.86 0.75 0.83 0.82 0.78 0.86 0.6 0.75 0.69
[LOI] a cg/g -0.33 -0.24 -0.28 -0.5 -0.42 1.02 -0.3 -0.05 -0.44 -0.33 -0.61 -0.19 -0.68 -0.65 -0.32 -0.75 -0.33 -0.61
total a cg/g 100.4 100.4 100.4 100.4 100.5 100.6 100.5 100.5 100.5 100.3 100.5 100.5 99.6 100.6 100.0 99.8 100.3 99.7
[Cr] a µg/g 190 216 187 216 208 232 199 163 192 177 229 205 68 407 79 74 138 157
[Ni] a µg/g 136 152 187 204 148 160 144 119 138 129 157 145 46 170 46 61 64 78
[Li] b µg/g 8.29 8.29 6.75 6.56 7.83 8.2 8.46 10.77 6.58 7.58 7.62 7.77 6.48 6.2 7.75 6.06 7.03 6.68
[B] c µg/g 2.68 1.73 0.6 0.57 2.46 2.15 2.1 2.24 2.42 2.7 2.86 2.24 2.71 2.6 2.54 2.23 2.68 2.61
[Rb] b µg/g 42.0 38.7 10.8 7.3 43.3 36.4 40.3 56.1 40.2 42.3 47.0 43.1 48.1 39.9 44.7 34.1 41.0 41.7
[Sr] b µg/g 937 971 241 204 890 911 968 955 945 977 948 971 1163 1104 1205 1020 1087 1089
[Y] b µg/g 31.85 32.68 27.65 21.65 29.0 29.57 30.01 31.38 31.93 30.41 30.58 30.45 36.53 34.35 37.97 33.09 35.08 36.38
[Zr] c µg/g 283 268 80 71 272 272 284 277 294 297 297 279 384 343 406 320 372 356
[Nb] c µg/g 57.48 52.88 6.13 5.49 52.9 55.43 60.05 56.23 61.64 62.02 64.34 59.32 104.0 88.0 112.0 81.4 103.0 97.3
[Cs] b µg/g 0.41 0.4 0.34 0.27 0.42 0.41 0.34 0.53 0.37 0.42 0.44 0.44 0.48 0.44 0.5 0.37 0.46 0.45
[Ba] b µg/g 620.0 657.0 133.0 113.0 593.0 641.0 618.0 646.0 618.0 633.0 613.0 629.0 511.78 473.24 551.93 421.43 491.77 487.15
[La] b µg/g 45.18 45.93 7.2 5.49 43.06 42.67 45.15 47.7 45.56 46.12 48.28 45.01 77.1 77.49 82.2 62.24 72.76 73.55
[Ce] b µg/g 93.23 97.27 16.64 12.77 88.75 90.22 95.69 98.8 97.25 97.27 102.17 94.4 158.78 164.22 172.17 131.26 153.12 150.1
[Pr] b µg/g 11.26 11.29 2.27 1.73 10.7 10.34 10.93 11.18 11.2 11.19 11.22 10.76 18.83 18.72 19.72 15.09 17.31 17.47
[Nd] b µg/g 46.29 47.18 11.09 8.37 44.48 43.32 45.49 46.26 46.06 46.32 46.82 45.56 73.62 73.65 76.87 60.95 66.99 67.07
[Sm] b µg/g 8.95 9.08 3.2 2.38 8.86 8.46 8.98 8.91 8.9 8.77 8.67 8.93 12.4 12.19 12.62 10.98 11.47 11.35
[Eu] b µg/g 2.95 3.11 1.28 1.02 2.92 2.81 3.06 2.98 3.02 3.09 2.87 2.95 3.85 3.71 4.03 3.34 3.53 3.56
[Gd] b µg/g 8.09 8.05 4.35 3.37 7.65 7.38 7.83 7.93 7.75 7.94 7.93 7.82 10.42 10.13 10.44 9.13 9.7 9.55
[Tb] b µg/g 1.14 1.15 0.75 0.59 1.11 1.05 1.11 1.1 1.09 1.12 1.09 1.14 1.41 1.34 1.47 1.29 1.3 1.31
[Dy] b µg/g 5.91 6.06 4.6 3.67 5.81 5.48 5.69 5.79 5.68 5.93 6.01 5.77 7.24 6.74 7.4 6.56 6.74 6.81
[Ho] b µg/g 1.08 1.08 0.97 0.77 1.04 1.01 1.07 1.06 1.06 1.08 1.08 1.07 1.34 1.23 1.37 1.22 1.25 1.24
[Er] b µg/g 2.52 2.54 2.36 1.97 2.47 2.37 2.46 2.5 2.5 2.48 2.54 2.5 3.06 2.89 3.24 2.81 2.95 2.92
[Tm] b µg/g 0.35 0.36 0.34 0.28 0.33 0.33 0.34 0.33 0.33 0.34 0.36 0.35 0.42 0.39 0.44 0.39 0.41 0.4
[Yb] b µg/g 2.19 2.21 2.26 1.83 2.13 2.05 2.15 2.12 2.11 2.12 2.2 2.12 2.71 2.39 2.83 2.43 2.59 2.57
[Lu] b µg/g 0.29 0.3 0.31 0.25 0.29 0.28 0.29 0.29 0.28 0.3 0.3 0.29 0.36 0.34 0.39 0.32 0.35 0.34
[Hf] c µg/g 6.2 5.45 2.01 1.77 5.72 5.53 5.81 5.61 5.96 6.07 5.97 5.73 7.82 7.5 8.26 7.09 7.72 7.4
[Ta] c µg/g 3.65 3.2 0.36 0.32 3.41 3.27 3.58 3.45 3.68 3.7 3.89 3.57 5.68 5.79 6.1 4.53 5.62 5.25
[Pb] b µg/g 2.99 3.72 1.58 1.14 3.49 3.08 2.79 3.94 2.96 3.24 2.68 3.3 3.75 3.63 4.15 3.27 3.73 3.74
[Th] d µg/g 4.99 4.79 0.57 0.47 4.99 4.56 4.79 5.71 5.75 5.03 5.49 4.95 8.222 7.91 8.993 6.506 8.31 7.941
[U] d µg/g 1.36 1.26 0.16 0.13 1.32 1.32 1.25 1.47 1.36 1.39 1.51 1.31 2.229 2.14 2.417 1.713 2.24 2.129
230Th/232Th d 1.021 0.948 0.83 0.858 0.961 1.015 1.014 0.939 0.886 1.024 1.01 0.996 0.992 0.987 0.984 0.989 0.982 0.991
238U/232Th d 0.828 0.796 0.83 0.862 0.8 0.88 0.792 0.781 0.716 0.838 0.832 0.805 0.823 0.819 0.815 0.799 0.817 0.814
230Th/238U d 1.233 1.191 1.0 0.996 1.202 1.155 1.28 1.202 1.238 1.222 1.213 1.238 1.206 1.204 1.207 1.238 1.202 1.218
234U/238U d 1.0 0.999 1.0 0.998 0.999 0.999 0.997 1.003 1.001 1.0 1.001 0.999 1.002 1.0 1.001 1.002 1.003 1.003
[226Ra] e fg/g 589.8 524.9 52.1 45.0 548.0 529.0 551.0 608.0 577.0 589.0 633.0 565.0 1017.0 959.0 1130.0 864.0 1056.0 1017.0
226Ra/230Th e 1.04 1.039 0.995 1.005 1.026 1.027 1.021 1.019 1.017 1.028 1.028 1.032 1.121 1.104 1.148 1.207 1.164 1.162
(a) determined by XRF procedures of Takei (2002) on XRF PANalytical PW2400
(b) determined by Q-ICP-MS_procedures of Makishima and Nakamura (1997, 1999, 2006) on Q-ICPMS Agilent 7500cs
(c) determined by Q-ICP-MS_procedures of Lu et al. (2007) on Q-ICPMS Agilent 7500cs
(d) determined by U-Series_procedures of Yokoyama et al. (1999, 2001, 2003) on TIMS Thermo-Fisher MAT262
(e) determined by TIMS with total evaporation on TIMS Thermo-Fisher MAT262
name physical-form quantity unit global-id
D20 pub hand specimen 0.095 kg 20100614090845285.hkitagawa
D21 pub hand specimen 0.135 kg 20100310094404283.ttsujimori
D26 pub hand specimen 0.09 kg 20100310094404861.ttsujimori
D27 pub hand specimen 0.17 kg 20100310094405423.ttsujimori
D31 pub hand specimen 0.26 kg 20100614090845653.hkitagawa
BS14 pub hand specimen 0.445 kg 20100310094405204.ttsujimori
BS16 pub hand specimen 0.33 kg 20100310094405315.ttsujimori
MS19A pub powder 20100310094404048.ttsujimori
MS19B pub powder 20100310094401891.ttsujimori
TS8 pub hand specimen 0.125 kg 20100310094404510.ttsujimori
YF3 pub hand specimen 0.355 kg 20100310094404626.ttsujimori
YF4B pub hand specimen 0.555 kg 20100310094404751.ttsujimori
1909-2 pub hand specimen 0.515 kg 20100614090831322.hkitagawa
CA060 pub hand specimen 2.525 kg 20100331093158940.amitbasu
CA04 pub hand specimen 716.29 g 20100706092547891.hkitagawa
1982-1 pub hand specimen 0.83 kg 20100614090843075.hkitagawa
CA076 pub hand specimen 1.29 kg 20100614092848998.stokeshi
2000-1 pub hand specimen 0.965 kg 20100614092847838.stokeshi

The table is created from analysis shown below. The rowname major-trace-isotope (Aka et al., 2008) filters out analysis. Upper analysis has priority.To list more analysis, add a stone in stone sub-tab.

  • name
    technique
    device
    priority
D20 D21 D26 D27 D31 BS14 BS16 MS19A MS19B TS8 YF3 YF4B 1909-2 CA060 CA04 1982-1 CA076 2000-1 MS19AB does not refer to