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Table T2. Measured major element contents and recommended values for reference samples. (See table notes.)

Element oxide
(wt%)
JB-1b JB-2 JB-3
RV
(wt%)
This study
(wt%)
RD
(%)
RV
(wt%)
This study
(wt%)
RD
(%)
RV
(wt%)
This study
(wt%)
RD
(%)
SiO2 52.23 52.26 0.07 52.96 53.02 0.12 50.71 50.62 –0.18
TiO2 1.29 1.29 0.13 1.18 1.17 –0.80 1.44 1.45 0.28
Al2O3 14.69 14.51 –1.27 14.56 14.50 –0.38 17.16 17.10 –0.41
Fe2O3 9.22 9.18 –0.42 14.17 14.11 –0.41 11.81 11.82 0.07
MnO 0.15 0.15 –3.09 0.22 0.21 –1.54 0.18 0.18 –0.76
MgO 8.32 8.37 0.67 4.59 4.61 0.36 5.14 4.98 –3.24
CaO 9.81 9.81 –0.00 9.77 9.78 0.10 9.76 9.72 –0.43
Na2O 2.69 2.65 –1.28 2.03 1.99 –1.72 2.69 2.71 0.76
K2O 1.35 1.35 0.08 0.42 0.41 –0.90 0.79 0.78 –2.01
P2O5 0.26 0.27 1.38 0.10 0.10 –4.67 0.30 0.30 –1.42
Total: 100.00 100.96   100.00 101.07   100.00 100.93  

Notes: Recommended values (RV) for Geological Survey of Japan reference samples. Relative deviation (RD) values, an estimate of accuracy, are calculated between RV and values from this study. RV of JB-1b from Terashima et al. (1998), RV of JB-2 and JB-3 from Imai et al. (1995).

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