Table 1 Summary of geochronological data including raw CA-ID-TIMS age data and calculated MDAs (3 methods) from the top (AH3-3.5) and base (AH-0.4) of section.
Sample | Pb(c) | Pb | U | Th | Ratios | Ages (Ma) | corr | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
206 Pb | 208 Pb | 206 Pb | err | 207 Pb | err | 207 Pb | err | 206 Pb | err | 207 Pb | err | 207 Pb | err | ||||||
(pg) | Pb(c) | (pg) | U | 204 Pb | 206 Pb | 238 U | (2σ%) | 235 U | (2σ%) | 206 Pb | (2σ%) | 238 U | (2σ) | 235 U | (2σ) | 206 Pb | (2σ) | coef | |
TOP | |||||||||||||||||||
z2 | 0.18 | 29.1 | 109.8 | 0.21 | 1890.5 | 0.065 | 0.048557 | .(11) | 0.35368 | .(89) | 0.05285 | .(87) | 305.65 | 0.32 | 307.5 | 2.4 | 321 | 20 | 0.26 |
z4 | 0.81 | 9.4 | 152.5 | 0.46 | 582.7 | 0.145 | 0.048583 | .(19) | 0.35726 | 2.(00) | 0.05336 | 1.(94) | 305.82 | 0.55 | 310.2 | 5.3 | 343 | 44 | 0.33 |
z1 | 0.16 | 18.1 | 63.3 | 0.08 | 1224.3 | 0.025 | 0.048606 | .(14) | 0.35883 | 1.(15) | 0.05357 | 1.(10) | 305.95 | 0.42 | 311.3 | 3.1 | 352 | 25 | 0.41 |
MLA | 305.77 | 0.08 | |||||||||||||||||
WM | 305.78 | 0.23 | MSWD = | 0.51 | |||||||||||||||
YSG | 305.65 | 0.32 | |||||||||||||||||
BASE | |||||||||||||||||||
z1 | 0.20 | 7.7 | 31.6 | 0.31 | 500.2 | 0.097 | 0.048620 | − .(34) | 0.34850 | − 2.(71) | 0.05201 | − 2.(61) | 306.00 | 1.00 | 303.6 | 7.1 | 285 | 60 | 0.37 |
z17 | 0.22 | 13.0 | 62.6 | 0.07 | 886.7 | 0.021 | 0.048594 | − .(18) | 0.34892 | − 1.(42) | 0.05210 | − 1.(37) | 305.89 | 0.55 | 303.9 | 3.7 | 289.0 | 31.0 | 0.31 |
z2 | 0.24 | 5.7 | 28.4 | 0.26 | 378.1 | 0.081 | 0.048464 | − .(38) | 0.34552 | − 4.(32) | 0.05173 | − 4.(18) | 305.10 | 1.10 | 301.0 | 11.0 | 272.0 | 96.0 | 0.41 |
z4 | 0.20 | 58.1 | 228.3 | 0.53 | 3440.5 | 0.167 | 0.048640 | .(08) | 0.35360 | .(42) | 0.05275 | .(41) | 306.17 | 0.23 | 307.4 | 1.1 | 317.0 | 9.4 | 0.20 |
MLA | 306.10 | 0.07 | |||||||||||||||||
WM | 306.09 | 0.20 | MSWD = | 0.23 | |||||||||||||||
YSG | 305.09 | 1.15 | |||||||||||||||||
