Table T23. K2O analyses of core samples.
| Core,
section, interval (cm) |
Depth (mbsf) | AA K2O (wt%) |
XRF K2O (wt%) |
Sample descriptions |
|---|---|---|---|---|
| 185-801C- |
|
|
|
|
| 14R-1, 75.0 |
604.75
|
0.074
|
0.074
|
Least-altered basalt flow |
| 14R-2, 93.0 |
606.24
|
0.490
|
|
Fine-grained, black matte, pillow basalt |
| 14R-2, 120.0 |
606.51
|
2.058
|
|
Deep green granular interpillow sediment |
| 14R-3, 6.0 |
606.84
|
2.883
|
|
Emerald green chert, below first interpillow |
| 14R-3, 58.0 |
607.36
|
0.340
|
|
Aphyric pillow, second unit, fresh |
|
|
0.410
|
|
||
| 14R-3, 71.0 |
607.49
|
2.513
|
|
Small interpillow, dark green |
| 14R-3, 96.0 |
607.74
|
2.823
|
|
Interpillow, deep green, mostly precipitated material |
|
|
2.334
|
|
||
| 14R-3, 120.0 |
607.98
|
1.307
|
1.200
|
Interpillow, granular sediment |
| 14R-4, 65.0 |
608.81
|
0.167
|
0.145
|
Minimally altered basalt |
| 15R-1, 30.0 |
614.00
|
2.209
|
|
Interpillow, celadonite and carbonate, largely precipitated material |
| 15R-1, 93.0 |
614.63
|
0.619
|
|
Dark green halo around carbonate vein in green pillow breccia |
| 15R-1, 94.0 |
614.64
|
0.000
|
|
Lighter core of pale green halo, adjacent to Sample 185-801C-15R-1, 93 cm |
| 16R-3, 11.0 |
626.13
|
0.101
|
|
Fe-Si hydrothermal deposit |
| 16R-3, 50.0 |
626.52
|
0.878
|
0.760
|
Interpillow sediment |
| 16R-3, 64.0 |
626.66
|
0.333
|
|
Base of interpillow, deep green |
| 16R-3, 65.0 |
626.67
|
1.638
|
|
Top of pale green altered basalt |
| 16R-3, 78.0 |
626.80
|
0.355
|
|
Altered glass, dark green |
|
|
0.290
|
|
||
| 16R-3, 86.0 |
626.88
|
0.292
|
|
Darker green altered basalt |
| 16R-3, 108.0 |
627.10
|
0.500
|
|
Very dark gray basalt |
|
|
0.525
|
|
||
|
|
0.487
|
|
||
| 16R-3, 118.0 |
627.20
|
0.300
|
|
Dark gray basalt |
|
|
0.252
|
|
||
| 16R-3, 134.0 |
627.36
|
0.123
|
|
Gray, least-altered basalt |
Notes: Data obtained with shipboard atomic absorption (AA) as in "Analysis of Potassium in Basalts by Atomic Absorption Spectrometry" and with X-ray fluorescence (XRF) as in the "X-Ray Fluorescence Analysis," both in "Igneous and Sedimentary Geochemistry" in the "Explanatory Notes" chapter. This table is also available in ASCII format.