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Table T7. Check-standard data for ICP-AES analysis, Expedition 324. (See table notes.)

  Element   BAS-140    BAS-206 
Mean (N = 16) 2σ Published* Mean (N = 16) 2σ Published†
Major (wt%):
SiO2 50.46 1.73 50.50 48.85 1.99 49.53
TiO2 1.04 0.04 0.98 2.05 0.05 2.04
Al2O3 14.62 0.52 14.60 14.08 0.49 14.22
Fe2O3T 10.94 0.87 11.10 14.32 0.42 14.30
MnO 0.18 0.01 0.19 0.25 0.01 0.22
MgO 8.04 0.25 8.15 6.73 0.24 6.77
CaO 12.91 0.73 12.40 9.78 0.54 9.70
Na2O 1.86 0.09 1.84 2.87 0.11 2.78
K2O BD 0.22 0.01 0.10 0.18 0.18
P2O5 0.07 0.07 0.08 0.18 0.03 0.16
Trace (ppm):
Ba 12 18.4 2‡ 51 11.3 49.9
Sr 39 6.5 44 109 28.5 112
Zr 47 11.2 49‡ 118 8.1 127
Y 28 2.3 24 50 16.7 43.8
V 332 18.7 333‡ 452 17.5 461
Sc 45 1.7 43 49 2.4 47
Cu 79 15.7 81 52 14.3 60‡
Zn 80 7.1 80 126 11.2 103‡
Co 46 2.4 55 54 2.3 48‡
Cr 191 9.7 186 135 10.1 83.7
Ni 86 9.0 85 51 22.9 53.5

Notes: * = values published by Sparks and Zuleger (1995). † = values published by Leg 206 Shipboard Scientific Party (2003). ‡ = values reported by Expedition 309/312 Shipboard Scientific Party (2006). BAS-140 and BAS-206 are laboratory standards. Mean values of 16 analyses are indicated. Uncertainties are listed as ±2σ. Fe2O3T = total iron calculated as ferric oxide. BD = below detection.

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