Table 2

Detrital shocked zircon U-Th-Pb isotopic data from SHRIMP

SpotU
(ppm)
Th
(ppm)
Th/U% comm
206Pba
204Pb/206Pb208Pba/232Th207Pba/235U206Pba/238U207Pba/206Pba206Pba/238U
Age (Ma)
207Pba/206Pba
Age (Ma)
%
conc
14VD77-1224
1224-196880.940.180.00010.139 ± 0.00320.32 ± 0.39120.6055 ± 0.01060.24341 ± 0.001983052 ± 853142 ± 2697
1224-23484681.390.170.00010.153 ± 0.00219.92 ± 0.29110.6000 ± 0.00740.24077 ± 0.001873030 ± 603125 ± 2597
1224-32072341.170.170.00010.161 ± 0.00320.99 ± 0.39640.6367 ± 0.00950.23912 ± 0.002783176 ± 753114 ± 37102
14VD80-373
373-1183610.351.030.000570.126 ± 0.00316.74 ± 0.24130.5303 ± 0.00700.22893 ± 0.001332743 ± 593045 ± 1990
373-2107460.450.800.000440.126 ± 0.00517.64 ± 0.29030.5563 ± 0.00830.22994 ± 0.001562851 ± 693052 ± 2293
373-33401750.530.390.000210.159 ± 0.00319.06 ± 0.27870.5893 ± 0.00840.23463 ± 0.000812987 ± 683084 ± 1197
373-42631120.440.260.000140.148 ± 0.00518.85 ± 0.24050.5875 ± 0.00720.23265 ± 0.000872979 ± 583070 ± 1297
373-5283940.350.430.000240.149 ± 0.00218.46 ± 0.23780.5753 ± 0.00700.23269 ± 0.000952930 ± 583071 ± 1395
09VD48-2
2-11301501.190.040.000020.5379 ± 0.011016.767 ± 0.3560.5379 ± 0.01100.22608 ± 0.001222775 ± 923024 ± 1792
2-285560.680.270.000150.5935 ± 0.012718.595 ± 0.4140.5935 ± 0.01270.22724 ± 0.001433004 ± 1023033 ± 2099
2-3101910.930.590.000330.5656 ± 0.011917.885 ± 0.4230.5656 ± 0.01190.22933 ± 0.002502890 ± 983047 ± 3595
2-4112940.870.020.000010.5693 ± 0.011917.910 ± 0.3840.5693 ± 0.01190.22815 ± 0.001102905 ± 983039 ± 1596
  • Notes: comm = common; conc = concordance. Uncertainty in isotopic ratios and ages are listed at 2σ. The percent of concordance is calculated as follows: [(206Pba/238U age)/(207Pba/206Pba age)] × 100%.

  • a Indicates a 204Pb corrected Pb value after Ludwig (2001a).