Previous   |    Close   |    Next

Table T6. Handheld X-ray fluorescence measurements for four certified silicate standards, Expedition 345.

  BCR-2 BHVO-2 JB-2 JA-1
Compiled values Measured (N = 5) Accuracy (%) Precision (%) Compiled values Measured (N = 5) Accuracy (%) Precision (%) Compiled values Measured (N = 5) Accuracy (%) Precision (%) Compiled values Measured (N = 5) Accuracy (%) Precision (%)
Major element (wt%):
SiO2 54.1 44.51 –17.73 5.35 49.9 39.50 –20.85 4.52 53.20 43.27 –18.67 5.37 63.97 44.14 –31.00 6.89
TiO2 2.26 1.74 –22.82 1.20 2.73 2.08 –23.95 0.97 1.19 0.90 –24.33 0.98 0.85 0.49 –41.90 1.85
Al2O3 13.5 8.16 –39.54 8.72 13.5 8.53 –36.83 8.07 14.67 9.25 –36.92 10.97 15.22 7.52 –50.59 12.85
FeOT 12.28 10.20 –16.95 0.18 10.95 8.30 –24.18 0.35 12.76 9.70 –24.00 0.54 6.29 5.41 –14.01 0.42
MnO 0.2 0.22 8.30 4.52 0.17 0.19 10.89 5.33 0.20 0.21 5.00 1.80 0.157 0.17 8.28 4.86
MgO 3.59 BDL — — 7.23 4.30 –40.53 22.32 4.66 BDL — — 1.57 BDL — —
CaO 7.12 6.89 –3.28 0.63 11.4 10.70 –6.14 0.68 9.89 9.81 –0.81 0.82 5.7 5.61 –1.58 1.55
Na2O 3.16 — — — 2.22 — — — 2.03 0.35 –82.72 — 3.84 — — —
K2O 1.79 1.46 –18.44 1.23 0.52 0.44 –15.96 3.30 0.42 0.35 –16.46 2.50 0.763 0.35 –54.13 0.95
P2O5 0.35 BDL — — 0.27 0.17 –37.04 43.41 0.10 BDL — — 0.165 — — —
Total: 98.35 73.18     98.89 74.20     99.12       98.53 63.70    
Trace element (ppm):
Ba 677 BDL — — 131 BDL — — 208 BDL — — 303 BDL — —
Sr 340 240 –29.41 — 396 275 –31 2.10 178 125 –30 4.62 264 160 –39 12.60
Zr 184.00 153 –17.12 3.28 172.00 140 –19 5.83 51 40 –22 10.70 84 72 –14 6.20
V 416 135 –67.55 6.01 317 214 –32 7.39 578 788 36 6.70 108 270 150 3.02
Cr 18.0 BDL — — 280.0 232 –17 3.28 27 BDL — — 6.4 BDL — —
Co 37 BDL   — 45 BDL — — 39.8 BDL — — 11 BDL — —
Ni 18 BDL — — 119 92 –23 19.47 14.2 BDL — — 1.7 BDL — —
Cu 21.0 BDL — — 127.0 118 –7 8.15 227 223 –2 2.25 41 BDL — —
Zn 127.0 113 –11.42 8.51 103.0 90 –13 8.16 110 103 –7 9.34 91 55 –40 10.50

N = number of measurements on the same spot for each analysis. FeOT = all Fe measured as FeO, BDL = below detection limit, — = not applicable. Compilation data from Govindaraju (1994) and GeoReM (georem.mpch-mainz.gwdg.de; 31 December 2012).

Previous   |    Close   |    Next   |    Top of page