(U - Th)/ He Data
Sample Name and aliquota Rs (µm)b Rs (µm)b 4He (nmol/g)c 4He (nmol/g)c ±d U (ppm)c ±d Th (ppm)c ±d Sm (ppm)c ±d eUe ±f Uncorr Date (Ma)g ±h FT combi Date (Ma)j ±k
19SOLO02_A01 63 1.854 1.854 0.016 0.016 5.2 0.3 11.4 0.5 217 3.9 8.2 1.2 41.8 1.8 0.76 54.3 4.8
19SOLO02_A02 42 0.173 0.173 0.015 0.015 4 0.4 5.1 0.3 131.8 6.3 5.4 0.8 5.9 0.6 0.66 9 1.9
19SOLO02_A03 47 0.204 0.204 0.007 0.007 2.4 0.3 3.8 0 107.7 3.7 3.5 0.5 10.9 1 0.69 15.6 2.9
19SOLO02_A04 44 0.900 0.900 0.008 0.008 5 0.3 10.7 0.5 232.6 4.6 7.9 1.2 21.2 0.9 0.67 31.4 2.8
19SOLO02_A05 50 1.058 1.058 0.015 0.015 6.2 0.3 12.8 0.3 259.3 4.1 9.6 1.4 20.4 0.7 0.71 28.7 1.9
19SOLO02_A06 45 0.683 0.683 0.010 0.010 5.1 0.4 10.1 0.4 203.1 6.7 7.7 1.2 16.5 1 0.68 24 2.9
MW Avg 27.9 14.3
19SOLO06_A01 75 0.040 0.040 0.002 0.002 2.5 0.1 3.8 0.1 35 1.2 3.4 0.5 2.2 0.1 0.8 2.7 0.3
\sout19SOLO06_A02 \sout41 \sout0.002 \sout0.002 \sout0.007 \sout0.007 \sout0.5 \sout0.3 \sout2.6 \sout1.6 \sout1.4 \sout5.2 \sout1.2 \sout0.2 \sout0.3 \sout1.2 \sout0.63 \sout0.4 \sout3.7
19SOLO06_A03 78 0.028 0.028 0.001 0.001 1.5 0.1 2.5 0.1 45.9 0.7 2.1 0.3 2.4 0.2 0.81 2.9 0.4
19SOLO06_A04 71 0.034 0.034 0.002 0.002 1.9 0.1 3.9 0 62.6 1.2 2.9 0.4 2.2 0.1 0.79 2.8 0.4
19SOLO06_A05 69 0.031 0.031 0.003 0.003 1.7 0.2 3 0.6 60.1 1.4 2.5 0.4 2.3 0.3 0.79 2.9 0.7
19SOLO06_A06 71 0.041 0.041 0.002 0.002 2.2 0.2 4.1 0.1 71 1.5 3.3 0.5 2.3 0.2 0.79 2.9 0.4
MW Avg 2.9 0.9
19SOLO07_A01 105 0.021 0.021 0.001 0.001 4.9 0.1 1.8 0 49.4 0.7 5.4 0.8 0.7 0 0.86 0.9 0.1
19SOLO07_A02 59 0.019 0.019 0.003 0.003 6.4 0.4 10.2 0.5 103.8 2.6 9 1.3 0.4 0.1 0.75 0.5 0.2
19SOLO07_A03 59 0.015 0.015 0.003 0.003 2.1 0.1 3.8 0.1 73.2 1.8 3.1 0.5 0.9 0.2 0.75 1.1 0.4
19SOLO07_A04 71 0.012 0.012 0.002 0.002 1.8 0.1 3.3 0.1 64 1.5 2.7 0.4 0.8 0.2 0.79 1.1 0.4
19SOLO07_A05 58 0.031 0.031 0.004 0.004 3 0.1 5.5 0.3 115.9 2.7 4.4 0.7 1.3 0.2 0.75 1.7 0.5
19SOLO07_A06 43 0.037 0.037 0.008 0.008 5.7 0.5 10.4 0.3 238.1 5.8 8.5 1.3 0.8 0.2 0.66 1.2 0.6
MW Avg 1.1 0.4
19SOLO10_A01 36 0.047 0.047 0.011 0.011 2.8 1.1 3.7 0.4 56.4 10.6 3.8 0.6 2.3 0.8 0.6 3.8 2.8
\sout19SOLO10_A02 \sout54 \sout0.052 \sout0.052 \sout0.005 \sout0.005 \sout0.9 \sout0.1 \sout3.1 \sout0.2 \sout101.8 \sout2.7 \sout1.7 \sout0.3 \sout5.6 \sout0.6 \sout0.72 \sout7.5 \sout1.7
19SOLO10_A03 54 0.022 0.022 0.005 0.005 2 0.1 2.5 0 60.3 2.6 2.6 0.4 1.5 0.4 0.73 2.1 1.1
19SOLO10_A04 44 0.020 0.020 0.010 0.010 3.6 0.2 3.8 0.2 110.1 4.3 4.7 0.7 0.8 0.4 0.68 1.2 1.3
19SOLO10_A05 74 0.012 0.012 0.002 0.002 2.4 0.2 2.6 0.1 62.9 1.1 3.1 0.5 0.7 0.1 0.8 0.9 0.3
19SOLO10_A06 58 0.021 0.021 0.003 0.003 2.7 0.1 3 0.2 91.4 2.3 3.5 0.5 1.1 0.2 0.75 1.5 0.5
MW Avg 1.9 1.0
19SOLO11_A01 69 0.041 0.041 0.002 0.002 1.6 0.1 5.5 0.2 125.3 2.7 3 0.5 2.5 0.1 0.78 3.2 0.4
19SOLO11_A02 72 0.045 0.045 0.003 0.003 2.8 0.1 10.7 0.4 159.4 2.1 5.6 0.8 1.5 0.1 0.79 1.9 0.2
\sout19SOLO11_A03 \sout63 \sout0.114 \sout0.114 \sout0.003 \sout0.003 \sout1.1 \sout0.1 \sout3.6 \sout0.2 \sout107.4 \sout1.6 \sout2.1 \sout0.3 \sout10 \sout0.6 \sout0.76 \sout13 \sout1.6
19SOLO11_A04 58 0.092 0.092 0.003 0.003 2.8 0.1 10.6 0.2 195.7 2.5 5.5 0.8 3.1 0.1 0.74 4.1 0.3
19SOLO11_A05 74 0.002 0.002 0.001 0.001 0.1 0 0.4 0 3.7 0.7 0.2 0 1.6 0.8 0.8 2.1 2.1
19SOLO11_A06 72 0.037 0.037 0.002 0.002 1 0.1 3.4 0.1 70.6 1.3 1.9 0.3 3.7 0.3 0.79 4.7 0.7
MW Avg 3.2 1.1
19SOLO02_Z01 75 8.649 8.649 0.074 0.074 206.6 2 110.2 1 0 0 232.9 46.6 6.9 0.1 0.84 8.2 0.2
19SOLO02_Z02 76 3.912 3.912 0.038 0.038 92 1 40.7 1 0 0 101.7 20.3 7.1 0.1 0.84 8.4 0.2
19SOLO02_Z03 62 10.161 10.161 0.044 0.044 278.2 5 149.6 2 0 0 313.78 62.76 6 0.8 0.79 7.4 0.2
MW Avg 8.2 0.4
a - Sample and mineral being analyzed. a is apatite, z is zircon. b - Rs is the radius of a sphere with an equivalent alpha ejection correction as the grain, calculated using equation A6 in Cooperdock et al., (2019) c - Concentrations of He, U, Th and Sm computed from their absolute amounts and the estimated dimensional mass reported in Table 3 d - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements e - eU is effective uranium concentration. Calculated as U + 0.238*Th + 0.0012*Sm after Cooperdock et al., (2019) f - Uncertainty on eU estimated at 15% of the eU value g - Uncorrected date is calculated iteratively using the 4He production equation defined as equation 1 in Wolf et al. (1998) and assuming secular equilibrium. h - 2s propagated analytical uncertainty on the U, Th, Sm and He measurements i - The combined alpha-ejection correction for the crystal calculated from the isotope specific FT corrections in Table 2, the proportion of U and Th contributing to 4He production, and assuming homogeneous parent isotope distributions. j - The corrected date is calculated iteratively using the absolute values of He, U, Th and Sm in Table 2, the isotope specific FT corrections in Table 2, and equation 34 in Ketcham at al., (2011) assuming secular equilibrium. k - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements. MW Avg - Inverse variance weighted mean; mean ages and uncertainty do not include grains that were parsed due to Z-scores > 2- a - Sample and mineral being analyzed. a is apatite, z is zircon. b - Rs is the radius of a sphere with an equivalent alpha ejection correction as the grain, calculated using equation A6 in Cooperdock et al., (2019) c - Concentrations of He, U, Th and Sm computed from their absolute amounts and the estimated dimensional mass reported in Table 3 d - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements e - eU is effective uranium concentration. Calculated as U + 0.238*Th + 0.0012*Sm after Cooperdock et al., (2019) f - Uncertainty on eU estimated at 15% of the eU value g - Uncorrected date is calculated iteratively using the 4He production equation defined as equation 1 in Wolf et al. (1998) and assuming secular equilibrium. h - 2s propagated analytical uncertainty on the U, Th, Sm and He measurements i - The combined alpha-ejection correction for the crystal calculated from the isotope specific FT corrections in Table 2, the proportion of U and Th contributing to 4He production, and assuming homogeneous parent isotope distributions. j - The corrected date is calculated iteratively using the absolute values of He, U, Th and Sm in Table 2, the isotope specific FT corrections in Table 2, and equation 34 in Ketcham at al., (2011) assuming secular equilibrium. k - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements. MW Avg - Inverse variance weighted mean; mean ages and uncertainty do not include grains that were parsed due to Z-scores > 2- a - Sample and mineral being analyzed. a is apatite, z is zircon. b - Rs is the radius of a sphere with an equivalent alpha ejection correction as the grain, calculated using equation A6 in Cooperdock et al., (2019) c - Concentrations of He, U, Th and Sm computed from their absolute amounts and the estimated dimensional mass reported in Table 3 d - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements e - eU is effective uranium concentration. Calculated as U + 0.238*Th + 0.0012*Sm after Cooperdock et al., (2019) f - Uncertainty on eU estimated at 15% of the eU value g - Uncorrected date is calculated iteratively using the 4He production equation defined as equation 1 in Wolf et al. (1998) and assuming secular equilibrium. h - 2s propagated analytical uncertainty on the U, Th, Sm and He measurements i - The combined alpha-ejection correction for the crystal calculated from the isotope specific FT corrections in Table 2, the proportion of U and Th contributing to 4He production, and assuming homogeneous parent isotope distributions. j - The corrected date is calculated iteratively using the absolute values of He, U, Th and Sm in Table 2, the isotope specific FT corrections in Table 2, and equation 34 in Ketcham at al., (2011) assuming secular equilibrium. k - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements. MW Avg - Inverse variance weighted mean; mean ages and uncertainty do not include grains that were parsed due to Z-scores > 2- a - Sample and mineral being analyzed. a is apatite, z is zircon. b - Rs is the radius of a sphere with an equivalent alpha ejection correction as the grain, calculated using equation A6 in Cooperdock et al., (2019) c - Concentrations of He, U, Th and Sm computed from their absolute amounts and the estimated dimensional mass reported in Table 3 d - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements e - eU is effective uranium concentration. Calculated as U + 0.238*Th + 0.0012*Sm after Cooperdock et al., (2019) f - Uncertainty on eU estimated at 15% of the eU value g - Uncorrected date is calculated iteratively using the 4He production equation defined as equation 1 in Wolf et al. (1998) and assuming secular equilibrium. h - 2s propagated analytical uncertainty on the U, Th, Sm and He measurements i - The combined alpha-ejection correction for the crystal calculated from the isotope specific FT corrections in Table 2, the proportion of U and Th contributing to 4He production, and assuming homogeneous parent isotope distributions. j - The corrected date is calculated iteratively using the absolute values of He, U, Th and Sm in Table 2, the isotope specific FT corrections in Table 2, and equation 34 in Ketcham at al., (2011) assuming secular equilibrium. k - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements. MW Avg - Inverse variance weighted mean; mean ages and uncertainty do not include grains that were parsed due to Z-scores > 2- a - Sample and mineral being analyzed. a is apatite, z is zircon. b - Rs is the radius of a sphere with an equivalent alpha ejection correction as the grain, calculated using equation A6 in Cooperdock et al., (2019) c - Concentrations of He, U, Th and Sm computed from their absolute amounts and the estimated dimensional mass reported in Table 3 d - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements e - eU is effective uranium concentration. Calculated as U + 0.238*Th + 0.0012*Sm after Cooperdock et al., (2019) f - Uncertainty on eU estimated at 15% of the eU value g - Uncorrected date is calculated iteratively using the 4He production equation defined as equation 1 in Wolf et al. (1998) and assuming secular equilibrium. h - 2s propagated analytical uncertainty on the U, Th, Sm and He measurements i - The combined alpha-ejection correction for the crystal calculated from the isotope specific FT corrections in Table 2, the proportion of U and Th contributing to 4He production, and assuming homogeneous parent isotope distributions. j - The corrected date is calculated iteratively using the absolute values of He, U, Th and Sm in Table 2, the isotope specific FT corrections in Table 2, and equation 34 in Ketcham at al., (2011) assuming secular equilibrium. k - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements. MW Avg - Inverse variance weighted mean; mean ages and uncertainty do not include grains that were parsed due to Z-scores > 2- a - Sample and mineral being analyzed. a is apatite, z is zircon. b - Rs is the radius of a sphere with an equivalent alpha ejection correction as the grain, calculated using equation A6 in Cooperdock et al., (2019) c - Concentrations of He, U, Th and Sm computed from their absolute amounts and the estimated dimensional mass reported in Table 3 d - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements e - eU is effective uranium concentration. Calculated as U + 0.238*Th + 0.0012*Sm after Cooperdock et al., (2019) f - Uncertainty on eU estimated at 15% of the eU value g - Uncorrected date is calculated iteratively using the 4He production equation defined as equation 1 in Wolf et al. (1998) and assuming secular equilibrium. h - 2s propagated analytical uncertainty on the U, Th, Sm and He measurements i - The combined alpha-ejection correction for the crystal calculated from the isotope specific FT corrections in Table 2, the proportion of U and Th contributing to 4He production, and assuming homogeneous parent isotope distributions. j - The corrected date is calculated iteratively using the absolute values of He, U, Th and Sm in Table 2, the isotope specific FT corrections in Table 2, and equation 34 in Ketcham at al., (2011) assuming secular equilibrium. k - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements. MW Avg - Inverse variance weighted mean; mean ages and uncertainty do not include grains that were parsed due to Z-scores > 2- a - Sample and mineral being analyzed. a is apatite, z is zircon. b - Rs is the radius of a sphere with an equivalent alpha ejection correction as the grain, calculated using equation A6 in Cooperdock et al., (2019) c - Concentrations of He, U, Th and Sm computed from their absolute amounts and the estimated dimensional mass reported in Table 3 d - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements e - eU is effective uranium concentration. Calculated as U + 0.238*Th + 0.0012*Sm after Cooperdock et al., (2019) f - Uncertainty on eU estimated at 15% of the eU value g - Uncorrected date is calculated iteratively using the 4He production equation defined as equation 1 in Wolf et al. (1998) and assuming secular equilibrium. h - 2s propagated analytical uncertainty on the U, Th, Sm and He measurements i - The combined alpha-ejection correction for the crystal calculated from the isotope specific FT corrections in Table 2, the proportion of U and Th contributing to 4He production, and assuming homogeneous parent isotope distributions. j - The corrected date is calculated iteratively using the absolute values of He, U, Th and Sm in Table 2, the isotope specific FT corrections in Table 2, and equation 34 in Ketcham at al., (2011) assuming secular equilibrium. k - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements. MW Avg - Inverse variance weighted mean; mean ages and uncertainty do not include grains that were parsed due to Z-scores > 2- a - Sample and mineral being analyzed. a is apatite, z is zircon. b - Rs is the radius of a sphere with an equivalent alpha ejection correction as the grain, calculated using equation A6 in Cooperdock et al., (2019) c - Concentrations of He, U, Th and Sm computed from their absolute amounts and the estimated dimensional mass reported in Table 3 d - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements e - eU is effective uranium concentration. Calculated as U + 0.238*Th + 0.0012*Sm after Cooperdock et al., (2019) f - Uncertainty on eU estimated at 15% of the eU value g - Uncorrected date is calculated iteratively using the 4He production equation defined as equation 1 in Wolf et al. (1998) and assuming secular equilibrium. h - 2s propagated analytical uncertainty on the U, Th, Sm and He measurements i - The combined alpha-ejection correction for the crystal calculated from the isotope specific FT corrections in Table 2, the proportion of U and Th contributing to 4He production, and assuming homogeneous parent isotope distributions. j - The corrected date is calculated iteratively using the absolute values of He, U, Th and Sm in Table 2, the isotope specific FT corrections in Table 2, and equation 34 in Ketcham at al., (2011) assuming secular equilibrium. k - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements. MW Avg - Inverse variance weighted mean; mean ages and uncertainty do not include grains that were parsed due to Z-scores > 2- a - Sample and mineral being analyzed. a is apatite, z is zircon. b - Rs is the radius of a sphere with an equivalent alpha ejection correction as the grain, calculated using equation A6 in Cooperdock et al., (2019) c - Concentrations of He, U, Th and Sm computed from their absolute amounts and the estimated dimensional mass reported in Table 3 d - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements e - eU is effective uranium concentration. Calculated as U + 0.238*Th + 0.0012*Sm after Cooperdock et al., (2019) f - Uncertainty on eU estimated at 15% of the eU value g - Uncorrected date is calculated iteratively using the 4He production equation defined as equation 1 in Wolf et al. (1998) and assuming secular equilibrium. h - 2s propagated analytical uncertainty on the U, Th, Sm and He measurements i - The combined alpha-ejection correction for the crystal calculated from the isotope specific FT corrections in Table 2, the proportion of U and Th contributing to 4He production, and assuming homogeneous parent isotope distributions. j - The corrected date is calculated iteratively using the absolute values of He, U, Th and Sm in Table 2, the isotope specific FT corrections in Table 2, and equation 34 in Ketcham at al., (2011) assuming secular equilibrium. k - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements. MW Avg - Inverse variance weighted mean; mean ages and uncertainty do not include grains that were parsed due to Z-scores > 2- a - Sample and mineral being analyzed. a is apatite, z is zircon. b - Rs is the radius of a sphere with an equivalent alpha ejection correction as the grain, calculated using equation A6 in Cooperdock et al., (2019) c - Concentrations of He, U, Th and Sm computed from their absolute amounts and the estimated dimensional mass reported in Table 3 d - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements e - eU is effective uranium concentration. Calculated as U + 0.238*Th + 0.0012*Sm after Cooperdock et al., (2019) f - Uncertainty on eU estimated at 15% of the eU value g - Uncorrected date is calculated iteratively using the 4He production equation defined as equation 1 in Wolf et al. (1998) and assuming secular equilibrium. h - 2s propagated analytical uncertainty on the U, Th, Sm and He measurements i - The combined alpha-ejection correction for the crystal calculated from the isotope specific FT corrections in Table 2, the proportion of U and Th contributing to 4He production, and assuming homogeneous parent isotope distributions. j - The corrected date is calculated iteratively using the absolute values of He, U, Th and Sm in Table 2, the isotope specific FT corrections in Table 2, and equation 34 in Ketcham at al., (2011) assuming secular equilibrium. k - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements. MW Avg - Inverse variance weighted mean; mean ages and uncertainty do not include grains that were parsed due to Z-scores > 2- a - Sample and mineral being analyzed. a is apatite, z is zircon. b - Rs is the radius of a sphere with an equivalent alpha ejection correction as the grain, calculated using equation A6 in Cooperdock et al., (2019) c - Concentrations of He, U, Th and Sm computed from their absolute amounts and the estimated dimensional mass reported in Table 3 d - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements e - eU is effective uranium concentration. Calculated as U + 0.238*Th + 0.0012*Sm after Cooperdock et al., (2019) f - Uncertainty on eU estimated at 15% of the eU value g - Uncorrected date is calculated iteratively using the 4He production equation defined as equation 1 in Wolf et al. (1998) and assuming secular equilibrium. h - 2s propagated analytical uncertainty on the U, Th, Sm and He measurements i - The combined alpha-ejection correction for the crystal calculated from the isotope specific FT corrections in Table 2, the proportion of U and Th contributing to 4He production, and assuming homogeneous parent isotope distributions. j - The corrected date is calculated iteratively using the absolute values of He, U, Th and Sm in Table 2, the isotope specific FT corrections in Table 2, and equation 34 in Ketcham at al., (2011) assuming secular equilibrium. k - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements. MW Avg - Inverse variance weighted mean; mean ages and uncertainty do not include grains that were parsed due to Z-scores > 2- a - Sample and mineral being analyzed. a is apatite, z is zircon. b - Rs is the radius of a sphere with an equivalent alpha ejection correction as the grain, calculated using equation A6 in Cooperdock et al., (2019) c - Concentrations of He, U, Th and Sm computed from their absolute amounts and the estimated dimensional mass reported in Table 3 d - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements e - eU is effective uranium concentration. Calculated as U + 0.238*Th + 0.0012*Sm after Cooperdock et al., (2019) f - Uncertainty on eU estimated at 15% of the eU value g - Uncorrected date is calculated iteratively using the 4He production equation defined as equation 1 in Wolf et al. (1998) and assuming secular equilibrium. h - 2s propagated analytical uncertainty on the U, Th, Sm and He measurements i - The combined alpha-ejection correction for the crystal calculated from the isotope specific FT corrections in Table 2, the proportion of U and Th contributing to 4He production, and assuming homogeneous parent isotope distributions. j - The corrected date is calculated iteratively using the absolute values of He, U, Th and Sm in Table 2, the isotope specific FT corrections in Table 2, and equation 34 in Ketcham at al., (2011) assuming secular equilibrium. k - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements. MW Avg - Inverse variance weighted mean; mean ages and uncertainty do not include grains that were parsed due to Z-scores > 2- a - Sample and mineral being analyzed. a is apatite, z is zircon. b - Rs is the radius of a sphere with an equivalent alpha ejection correction as the grain, calculated using equation A6 in Cooperdock et al., (2019) c - Concentrations of He, U, Th and Sm computed from their absolute amounts and the estimated dimensional mass reported in Table 3 d - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements e - eU is effective uranium concentration. Calculated as U + 0.238*Th + 0.0012*Sm after Cooperdock et al., (2019) f - Uncertainty on eU estimated at 15% of the eU value g - Uncorrected date is calculated iteratively using the 4He production equation defined as equation 1 in Wolf et al. (1998) and assuming secular equilibrium. h - 2s propagated analytical uncertainty on the U, Th, Sm and He measurements i - The combined alpha-ejection correction for the crystal calculated from the isotope specific FT corrections in Table 2, the proportion of U and Th contributing to 4He production, and assuming homogeneous parent isotope distributions. j - The corrected date is calculated iteratively using the absolute values of He, U, Th and Sm in Table 2, the isotope specific FT corrections in Table 2, and equation 34 in Ketcham at al., (2011) assuming secular equilibrium. k - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements. MW Avg - Inverse variance weighted mean; mean ages and uncertainty do not include grains that were parsed due to Z-scores > 2- a - Sample and mineral being analyzed. a is apatite, z is zircon. b - Rs is the radius of a sphere with an equivalent alpha ejection correction as the grain, calculated using equation A6 in Cooperdock et al., (2019) c - Concentrations of He, U, Th and Sm computed from their absolute amounts and the estimated dimensional mass reported in Table 3 d - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements e - eU is effective uranium concentration. Calculated as U + 0.238*Th + 0.0012*Sm after Cooperdock et al., (2019) f - Uncertainty on eU estimated at 15% of the eU value g - Uncorrected date is calculated iteratively using the 4He production equation defined as equation 1 in Wolf et al. (1998) and assuming secular equilibrium. h - 2s propagated analytical uncertainty on the U, Th, Sm and He measurements i - The combined alpha-ejection correction for the crystal calculated from the isotope specific FT corrections in Table 2, the proportion of U and Th contributing to 4He production, and assuming homogeneous parent isotope distributions. j - The corrected date is calculated iteratively using the absolute values of He, U, Th and Sm in Table 2, the isotope specific FT corrections in Table 2, and equation 34 in Ketcham at al., (2011) assuming secular equilibrium. k - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements. MW Avg - Inverse variance weighted mean; mean ages and uncertainty do not include grains that were parsed due to Z-scores > 2- a - Sample and mineral being analyzed. a is apatite, z is zircon. b - Rs is the radius of a sphere with an equivalent alpha ejection correction as the grain, calculated using equation A6 in Cooperdock et al., (2019) c - Concentrations of He, U, Th and Sm computed from their absolute amounts and the estimated dimensional mass reported in Table 3 d - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements e - eU is effective uranium concentration. Calculated as U + 0.238*Th + 0.0012*Sm after Cooperdock et al., (2019) f - Uncertainty on eU estimated at 15% of the eU value g - Uncorrected date is calculated iteratively using the 4He production equation defined as equation 1 in Wolf et al. (1998) and assuming secular equilibrium. h - 2s propagated analytical uncertainty on the U, Th, Sm and He measurements i - The combined alpha-ejection correction for the crystal calculated from the isotope specific FT corrections in Table 2, the proportion of U and Th contributing to 4He production, and assuming homogeneous parent isotope distributions. j - The corrected date is calculated iteratively using the absolute values of He, U, Th and Sm in Table 2, the isotope specific FT corrections in Table 2, and equation 34 in Ketcham at al., (2011) assuming secular equilibrium. k - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements. MW Avg - Inverse variance weighted mean; mean ages and uncertainty do not include grains that were parsed due to Z-scores > 2- a - Sample and mineral being analyzed. a is apatite, z is zircon. b - Rs is the radius of a sphere with an equivalent alpha ejection correction as the grain, calculated using equation A6 in Cooperdock et al., (2019) c - Concentrations of He, U, Th and Sm computed from their absolute amounts and the estimated dimensional mass reported in Table 3 d - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements e - eU is effective uranium concentration. Calculated as U + 0.238*Th + 0.0012*Sm after Cooperdock et al., (2019) f - Uncertainty on eU estimated at 15% of the eU value g - Uncorrected date is calculated iteratively using the 4He production equation defined as equation 1 in Wolf et al. (1998) and assuming secular equilibrium. h - 2s propagated analytical uncertainty on the U, Th, Sm and He measurements i - The combined alpha-ejection correction for the crystal calculated from the isotope specific FT corrections in Table 2, the proportion of U and Th contributing to 4He production, and assuming homogeneous parent isotope distributions. j - The corrected date is calculated iteratively using the absolute values of He, U, Th and Sm in Table 2, the isotope specific FT corrections in Table 2, and equation 34 in Ketcham at al., (2011) assuming secular equilibrium. k - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements. MW Avg - Inverse variance weighted mean; mean ages and uncertainty do not include grains that were parsed due to Z-scores > 2- a - Sample and mineral being analyzed. a is apatite, z is zircon. b - Rs is the radius of a sphere with an equivalent alpha ejection correction as the grain, calculated using equation A6 in Cooperdock et al., (2019) c - Concentrations of He, U, Th and Sm computed from their absolute amounts and the estimated dimensional mass reported in Table 3 d - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements e - eU is effective uranium concentration. Calculated as U + 0.238*Th + 0.0012*Sm after Cooperdock et al., (2019) f - Uncertainty on eU estimated at 15% of the eU value g - Uncorrected date is calculated iteratively using the 4He production equation defined as equation 1 in Wolf et al. (1998) and assuming secular equilibrium. h - 2s propagated analytical uncertainty on the U, Th, Sm and He measurements i - The combined alpha-ejection correction for the crystal calculated from the isotope specific FT corrections in Table 2, the proportion of U and Th contributing to 4He production, and assuming homogeneous parent isotope distributions. j - The corrected date is calculated iteratively using the absolute values of He, U, Th and Sm in Table 2, the isotope specific FT corrections in Table 2, and equation 34 in Ketcham at al., (2011) assuming secular equilibrium. k - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements. MW Avg - Inverse variance weighted mean; mean ages and uncertainty do not include grains that were parsed due to Z-scores > 2- a - Sample and mineral being analyzed. a is apatite, z is zircon. b - Rs is the radius of a sphere with an equivalent alpha ejection correction as the grain, calculated using equation A6 in Cooperdock et al., (2019) c - Concentrations of He, U, Th and Sm computed from their absolute amounts and the estimated dimensional mass reported in Table 3 d - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements e - eU is effective uranium concentration. Calculated as U + 0.238*Th + 0.0012*Sm after Cooperdock et al., (2019) f - Uncertainty on eU estimated at 15% of the eU value g - Uncorrected date is calculated iteratively using the 4He production equation defined as equation 1 in Wolf et al. (1998) and assuming secular equilibrium. h - 2s propagated analytical uncertainty on the U, Th, Sm and He measurements i - The combined alpha-ejection correction for the crystal calculated from the isotope specific FT corrections in Table 2, the proportion of U and Th contributing to 4He production, and assuming homogeneous parent isotope distributions. j - The corrected date is calculated iteratively using the absolute values of He, U, Th and Sm in Table 2, the isotope specific FT corrections in Table 2, and equation 34 in Ketcham at al., (2011) assuming secular equilibrium. k - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements. MW Avg - Inverse variance weighted mean; mean ages and uncertainty do not include grains that were parsed due to Z-scores > 2- a - Sample and mineral being analyzed. a is apatite, z is zircon. b - Rs is the radius of a sphere with an equivalent alpha ejection correction as the grain, calculated using equation A6 in Cooperdock et al., (2019) c - Concentrations of He, U, Th and Sm computed from their absolute amounts and the estimated dimensional mass reported in Table 3 d - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements e - eU is effective uranium concentration. Calculated as U + 0.238*Th + 0.0012*Sm after Cooperdock et al., (2019) f - Uncertainty on eU estimated at 15% of the eU value g - Uncorrected date is calculated iteratively using the 4He production equation defined as equation 1 in Wolf et al. (1998) and assuming secular equilibrium. h - 2s propagated analytical uncertainty on the U, Th, Sm and He measurements i - The combined alpha-ejection correction for the crystal calculated from the isotope specific FT corrections in Table 2, the proportion of U and Th contributing to 4He production, and assuming homogeneous parent isotope distributions. j - The corrected date is calculated iteratively using the absolute values of He, U, Th and Sm in Table 2, the isotope specific FT corrections in Table 2, and equation 34 in Ketcham at al., (2011) assuming secular equilibrium. k - 2s propagated analytical uncertainty on the U, Th, Sm, and He measurements. MW Avg - Inverse variance weighted mean; mean ages and uncertainty do not include grains that were parsed due to Z-scores > 2-