"Table T8. USGS standards treated as unknowns using average counts on each standard, XRF1.",,,,,,,,,,,,
https://doi.org/10.14379/iodp.proc.391.202.2026,,,,,,,,,,,,
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"* = values deviate significantly from reference values for that element, ** = reference value used for Na2O. Columns compare USGS Reference Values to Calculated Values (mass absorption corrected), slope-corrected concentrations, and concentrations derived by traditional regression of tube-line normalized count data.",,,,,,,,,,,,
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,,BIR1,,,,BHVO1,,,,BCR1,,
,Reference value,Calculated (tube-line), Slope corrected,Traditional regressed,Reference value,Calculated (tube-line), Slope corrected,Traditional regressed,Reference value,Calculated (tube-line), Slope corrected,Traditional regressed
10 KV  XRF1,,,,,,,,,,,,
SiO2,47.96,45.93,47.83,47.84,49.79,49.47,49.89,49.89,54.11,56.72,54.1,54.09
TiO2,0.96,0.91,0.94,0.94,2.74,2.69,2.63,2.63,2.24,2.38,2.34,2.34
Al2O3,15.5,15.66,15.27,15.27,13.69,13.34,13.58,13.58,13.65,13.84,13.94,13.95
FeO,10.17,10.21,10.41,10.41,11.09,10.84,10.9,10.9,12.11,12.47,12.17,12.17
MnO,0.171,0.167,0.171,0.171,0.168,0.16,0.169,0.169,0.18,0.193,0.179,0.179
MgO,9.68,10.4,9.74,9.73,7.21,6.64,7.07,7.07,3.48,1.74,3.58,3.59
CaO,13.3,13.44,13.31,13.31,11.43,11.34,11.29,11.29,6.95,6.88,6.99,6.99
K2O,0.03,0.003,0.047,0.047,0.526,0.49,0.49,0.49,1.69,1.8,1.7,1.7
P2O5,0.021,0.06,0.056,0.056,0.277,0.26,0.25,0.25,0.36,0.38,0.37,0.37
Na2O**,1.82,1.820**,1.820**,1.820**,2.31,2.31**,2.31**,2.31**,3.27,3.27**,3.27**,3.27**
Cr ppm,382,401,378,402,289,273,293,249,16,95,175*,36*
Total,99.61,96.78,99.61,99.61,99.23,97.54,98.58,98.58,98.04,99.66,98.64,98.64
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30 KV  XRF1,,,,,,,,,,,,
K2O,0.03,0.1,0.04,0.05,0.52,0.52,0.5,0.5,1.69,1.64,1.69,1.69
CaO,13.24,13.66,13.37,13.37,11.4,11.3,11.19,11.19,6.95,6.79,7.03,7.03
TiO2,0.96,0.91,0.94,0.94,2.71,2.62,2.57,2.57,2.24,2.43,2.39,2.39
MnO,0.171,0.174,0.174,0.174,0.168,0.162,0.168,0.168,0.18,0.183,0.177,0.177
FeO,10.25,10.23,10.52,10.52,11.12,10.66,10.81,10.81,12.11,12.62,12.15,12.15
Co ppm,51,40,50,50,45,44,44,44,37,46,39,40
Ni ppm,166,144,162,161,121,137,117,116,13,120,22*,23*
Cu ppm,126,122,144,144,136,94,110,110,19,25,27,27
Zn ppm,71,84,73,73,105,101,105,105,130,112,128,127
Rb ppm,0.27,7.66,2.07*,2.08*,11,12.49,8.96,8.96,47.2,39.47,47.44,47.43
Sr ppm,108,114,106,106,403,379,393,393,330,331,341,341
Y ppm,16,18.3,18,18.1,27.6,24.7,25.2,25.2,38,36.6,38.4,38.3
Zr ppm,22,22,23,23,179,174,175,175,190,192,193,193
Nb ppm,2,3.5,3,3,19,20,19.6,19.5,14,12.9,12.4,12.4
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50 KV  XRF1,,,,,,,,,,,,
CaO,13.24,12.96,13.29,13.28,11.4,11.07,11.22,11.22,6.95,7.29,7.08,7.09
FeO,10.25,10.18,10.51,10.51,11.12,10.66,10.82,10.82,12.11,12.68,12.15,12.15
Ni ppm,166,143,129,126,121,138,83,84,13,138,88*,90*
Rb ppm,0.27,11.35,5.89*,5.95*,11,11.4,5.9,6,47.2,44.4,46.7,46.6
Sr ppm,108,116,107,107,403,378,396,396,330,326,339,339
Y ppm,16,16.9,17.4,17.5,27.6,26.1,26.3,26.3,38,38.1,37.9,37.8
Zr ppm,22,26,23,23,179,159,174,174,190,176,194,194
Nb ppm,2,3.4,3,3.1,19,19.3,19,18.9,14,13.4,13.1,13
Ba ppm,8,67,20,20,139,153,127,127,681,596,681,681