Table 2 Major and trace element concentrations of the diagenetic phases in the Cathedral Formation at Whirlpool Point, southern Rocky Mountains.
Phase | X-ray diffraction (XRD) | Inductively coupled plasma mass spectrometry (ICP-MS) | ||
|---|---|---|---|---|
%Ca | Sr (ppm) | Fe (ppm) | Mn (ppm) | |
Replacement dolomite a (RDa) | XRD (n = 9) | ICP-MS (n = 5) | ||
Min | 49.27 | 24.7 | 958.0 | 38.6 |
Mean | 50.21 | 171.3 | 2,407.1 | 182.7 |
Max | 50.72 | 377.7 | 6,057.1 | 546.5 |
SD | 0.471 | 167.8 | 2,097.6 | 212.7 |
Replacement dolomite b (RDb) | XRD (n = 12) | ICP-MS (n = 13) | ||
Min | 49.12 | 11.3 | 1444.5 | 101.4 |
Mean | 49.79 | 18.1 | 4907.1 | 340.4 |
Max | 50.30 | 37.5 | 11,006.0 | 813.3 |
SD | 0.404 | 6.7 | 3649.7 | 218.3 |
Saddle dolomite (SD) | XRD (n = 17) | ICP-MS (n = 6) | ||
Min | 48.79 | 11.5 | 2026.1 | 183.6 |
Mean | 49.65 | 20.2 | 7571.8 | 552.9 |
Max | 50.57 | 26.8 | 12,290.0 | 813.6 |
SD | 0.540 | 5.8 | 4272.9 | 278.4 |
Phase | Electron probe microanalysis (EPMA) | |||
|---|---|---|---|---|
Ca (wt%) | Mg (wt%) | Fe (ppm) | Mn (ppm) | |
Saddle dolomite a (SDa) | Mean %Ca = 49.92 | |||
Min | 15.92 | 8.42 | 0 | 0 |
Mean | 21.07 | 12.82 | 2170 | 290 |
Max | 26.22 | 16.46 | 4910 | 630 |
SD | 2.209 | 1.751 | 1420 | 140 |
Saddle dolomite b (SDb) | Mean %Ca = 49.67 | |||
Min | 16.13 | 8.85 | 0 | 0 |
Mean | 21.06 | 12.94 | 3310 | 380 |
Max | 25.99 | 17.03 | 5040 | 710 |
SD | 2.202 | 1.744 | 1590 | 180 |
Saddle dolomite c (SDc) | Mean %Ca = 50.53 | |||
Min | 14.77 | 7.53 | 0 | 0 |
Mean | 20.45 | 12.14 | 12,130 | 1190 |
Max | 26.13 | 16.75 | 36,740 | 2030 |
SD | 2.261 | 1.822 | 2030 | 660 |
