Elling, Felix J; Spiegel, Cornelia; Estrada, Solveig (2016): U-Pb age analyses on zircon grains from Mount Lawson Formation bentonites (Ellesmere Island) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.860806, In supplement to: Elling, Felix J; Spiegel, Cornelia; Estrada, Solveig; Davis, Donald W; Reinhardt, Lutz; Henjes-Kunst, Friedhelm; Allroggen, Niklas; Dohrmann, Reiner; Piepjohn, Karsten; Lisker, Frank (2016): Origin of Bentonites and Detrital Zircons of the Paleocene Basilika Formation, Svalbard. Frontiers in Earth Science, 4:73, https://doi.org/10.3389/feart.2016.00073
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Further details:
Jaffey, A H; Flynn, K F; Glendenin, L E; Bentley, W C; Essling, A M (1971): Precision measurement of half-lives and specific activities of 235U and 238U. Physical Review C, 4(5), 1889-1906, https://doi.org/10.1103/PhysRevC.4.1889
Project(s):
Coverage:
Latitude: 77.840056 * Longitude: -81.684361
Event(s):
Comment:
LA-ICP-MS analyses on zircon grains from Mount Lawson Formation bentonites (Ellesmere Island). Analyses listed from lowest to highest 206Pb/238U age for <1000 Ma and lowest to highest 207Pb/206Pb age for >1000 Ma. Spot nomenclature follows the scheme x-y.z: with x=sample number, y=grain, z=spot. Disc.: per cent discordance for the given 207Pb/206Pb age. Error correl.: Error correlation coefficient for concordia coordinates. Concordia coordinates: y = 206Pb/238U = EXP(L238*(206-238 Age)) - 1; x = 207Pb/235U = EXP(L235 × (207-235 Age)) - 1; 207Pb/206Pb = 137.88 × x/y; Uranium decay constants (L238 & L235) are from (Jaffey et al., 1971). L238 = 1.55125 × 10-4/Ma; L235 = 9.8485 × 10-4/Ma. Reference: Jaffey, A., K. Flynn, L. Glendenin, W. Bentley, and A. Essling (1971), Precision Measurement of Half-Lives and Specific Activities of 235U and 238U, Phys. Rev. C, 4(5), 1889-1906.
Parameter(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
345 data points
Data
| 1 Sample comment (Spot) | 2 U [mg/kg] (ppm) | 3 206Pb [mg/kg] (ppm) | 4 207Pb/235U | 5 207Pb/235U e [±] (1 Sigma) | 6 206Pb/238U | 7 206Pb/238U e [±] (1 Sigma) | 8 Rho (Err. Correl.) | 9 Age mineral [Ma] (Age, 207Pb/206Pb Lead-Lead) | 10 Age std dev [±] (1 Sigma, Age, 207Pb/206Pb Lea...) | 11 Age mineral [Ma] (Age, 207Pb/235U Lead-Uranium) | 12 Age std dev [±] (1 Sigma, Age, 207Pb/235U Lead...) | 13 Age mineral [Ma] (Age, 206Pb/238U Lead-Uranium) | 14 Age std dev [±] (1 Sigma, Age, 206Pb/238U Lead...) | 15 D [%] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DWD1-8.1 | 69 | 4 | 0.490 | 0.012 | 0.0632 | 0.0007 | 0.468 | 462 | 48 | 405 | 8 | 395 | 4 | 15 |
| DWD2-3.1 | 134 | 9 | 0.528 | 0.007 | 0.0683 | 0.0007 | 0.717 | 453 | 22 | 430 | 5 | 426 | 4 | 6 |
| DWD2-7.1 | 336 | 54 | 1.619 | 0.018 | 0.1611 | 0.0014 | 0.813 | 1011 | 13 | 978 | 7 | 963 | 8 | 5 |
| DWD3-4.1 | 162 | 31 | 2.023 | 0.020 | 0.1931 | 0.0015 | 0.759 | 1094 | 13 | 1123 | 7 | 1138 | 8 | -4 |
| DWD3-3.1 | 160 | 27 | 1.831 | 0.034 | 0.1698 | 0.0015 | 0.494 | 1151 | 32 | 1056 | 12 | 1011 | 9 | 13 |
| DWD2-8.1 | 141 | 28 | 2.187 | 0.036 | 0.2011 | 0.0023 | 0.703 | 1169 | 23 | 1177 | 11 | 1181 | 13 | -1 |
| DWD1-6.1 | 337 | 96 | 3.725 | 0.044 | 0.2836 | 0.0029 | 0.856 | 1533 | 12 | 1577 | 10 | 1610 | 15 | -6 |
| DWD1-2.1 | 189 | 55 | 4.006 | 0.037 | 0.2917 | 0.0021 | 0.796 | 1617 | 10 | 1635 | 7 | 1650 | 11 | -2 |
| DWD1-9.1 | 7 | 2 | 4.917 | 0.144 | 0.3236 | 0.0071 | 0.756 | 1802 | 34 | 1805 | 24 | 1807 | 35 | 0 |
| DWD1-4.1 | 82 | 26 | 4.934 | 0.065 | 0.3244 | 0.0034 | 0.795 | 1805 | 15 | 1808 | 11 | 1811 | 17 | 0 |
| DWD1-10.1 | 15 | 5 | 4.985 | 0.106 | 0.3210 | 0.0043 | 0.625 | 1842 | 30 | 1817 | 18 | 1795 | 21 | 3 |
| DWD2-5.1 | 70 | 23 | 5.204 | 0.062 | 0.3281 | 0.0031 | 0.799 | 1880 | 13 | 1853 | 10 | 1829 | 15 | 3 |
| DWD1-7.1 | 367 | 128 | 5.546 | 0.070 | 0.3481 | 0.0040 | 0.897 | 1888 | 10 | 1908 | 11 | 1926 | 19 | -2 |
| DWD1-1.1 | 164 | 57 | 5.519 | 0.055 | 0.3456 | 0.0029 | 0.845 | 1893 | 10 | 1904 | 9 | 1913 | 14 | -1 |
| DWD2-13.1 | 114 | 40 | 5.708 | 0.060 | 0.3497 | 0.0031 | 0.842 | 1932 | 10 | 1933 | 9 | 1933 | 15 | 0 |
| DWD1-3.1 | 172 | 56 | 5.492 | 0.056 | 0.3248 | 0.0029 | 0.877 | 1995 | 9 | 1899 | 9 | 1813 | 14 | 10 |
| DWD3-7.1 | 98 | 33 | 6.214 | 0.085 | 0.3418 | 0.0039 | 0.839 | 2123 | 13 | 2006 | 12 | 1895 | 19 | 12 |
| DWD2-6.1 | 84 | 38 | 10.445 | 0.155 | 0.4511 | 0.0062 | 0.921 | 2537 | 10 | 2475 | 14 | 2400 | 27 | 6 |
| DWD2-9.1 | 73 | 37 | 12.903 | 0.171 | 0.5068 | 0.0059 | 0.872 | 2695 | 11 | 2673 | 12 | 2643 | 25 | 2 |
| DWD1-5.1 | 310 | 169 | 14.856 | 0.161 | 0.5460 | 0.0053 | 0.899 | 2804 | 8 | 2806 | 10 | 2808 | 22 | 0 |
| DWD3-6.1 | 117 | 61 | 14.619 | 0.184 | 0.5239 | 0.0054 | 0.816 | 2846 | 12 | 2791 | 12 | 2716 | 23 | 6 |
| DWD2-4.1 | 103 | 47 | 13.216 | 0.146 | 0.4586 | 0.0044 | 0.869 | 2898 | 9 | 2695 | 10 | 2433 | 19 | 19 |
| DWD2-12.1 | 140 | 76 | 18.081 | 0.215 | 0.5469 | 0.0056 | 0.864 | 3119 | 10 | 2994 | 11 | 2812 | 23 | 12 |