Table T7. Major element analytical precision determined during Leg 183.
 
Element BHVO-1
Published values
Mean 1*
(N = 26)
1 SD*
(%)
Mean 2
(N = 13)
1 SD
(%)
Kilauea
1919-1**
1 SD**
(%)
SiO2 49.62 49.53 0.45 49.86 0.23 49.65 0.04
TiO2 2.70 2.75 2.51 2.70 0.39 2.804 0.003
Al2O3 13.67 13.65 1.04 13.60 0.61 13.56 0.03
Fe2O3 12.23 12.18 0.62 12.29 1.05 12.09 0.01
MnO 0.17 0.17 2.39 0.18 2.07 0.159 0.001
MgO 7.13 7.09 1.80 7.09 0.38 6.530 0.004
CaO 11.32 11.37 0.71 11.35 0.19 11.41 0.01
Na2O 2.27 1.99 6.11 2.08 4.29 2.44 0.02
K2O 0.54 0.54 1.64 0.54 5.77 0.537 0.002
P2O5 0.27 0.26 1.91 0.28 1.88 0.286 0.001

Notes: * = analyses run through Site 1138 samples. SD = standard deviation. = analyses run after Site 1138 samples. Means (in weight percent) and standard deviations of repeated analyses of the BHVO-1 reference standard are reported as two sets because of recalibration after mechanical repairs during the leg. ** = samples from Sites 1141 and 1142 were analyzed postcruise at The University of Massachusetts. Kilauea 1919-1 is a sample collected from the same flow as BHVO-1 and is used as a standard at The University of Massachusetts. The reported values are the average and standard deviation of three replicate measurements.