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Table T9. Analyses of potential grinding contamination and background blank.

Element Grinding error,
Leg 206 N = 3
Background blank,
Exp. 301 N = 4
Major element oxides (wt%):
SiO2 0 BDL
Al2O3 BDL BDL
TiO2 BDL 0.01
Fe2O3 BDL 0.14
MgO BDL 0.20
MnO BDL BDL
CaO BDL 0.08
Na2O BDL 0.01
K2O 0.01 0.03
P2O5 BDL 0.13
Trace elements (ppm):
Cr 4.3 BDL
Ni 3.9 44.45
V BDL 7.61
Sc BDL 0.08
Ba BDL 0.23
Sr BDL BDL
Y BDL BDL
Zr BDL 12.06
Nb BDL BDL

Notes: The grinding contamination test was conducted during Leg 206 (Shipboard Scientific Party, 2003); SiO2 was subtracted from the grinding error because pure SiO2 was used to determine grinding contamination. Because the same sample preparation techniques were used during Expedition 301, these data give an indication of the potential grinding contamination in our data. The background blank was determined from drift-corrected intensities. BDL = below detection limit. N = number of determinations.

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