Table T2. Results of repeated opal measurements in regard to the analytical precision of the method.
Core, section,
interval (cm) |
Numbers
|
Mean
(wt% SiO2) |
Standard
deviation (wt% SiO2) |
Coefficient
of variation (%) |
|---|---|---|---|---|
| 178-1095B-4H-5, 74-75 | 12 | 19.8 | 2.7 | 3.9 |
| 178-1096A-8H-7, 16-18 | 15 | 1.8 | 0.2 | 2.3 |
| 178-1096B-9H-2, 10-12 | 14 | 2.9 | 0.5 | 4.4 |