Skip to main content

Advertisement

Table 1 Ar isotope analyses of representative aliquots of basaltic rock

From: Improvement of 40Ar/39Ar age determinations for Quaternary basaltic rocks by eliminating the peak suppression effect

Sample IDPrevious protocolModified protocol
564-06564-11642-02642-06
fAmp±1 sd% sdfAmp± 1 sd% sdfAmp± 1 sd% sdfAmp± 1 sd% sd
40Ar67.01401.74112.667.86631.15951.7186.19210.06030.07116.05730.08340.07
39Ar8.52310.15771.859.43450.15151.6110.77800.06720.6219.98440.09970.05
38Ar0.11480.1500130.660.11140.1744156.620.01260.0627497.120.46810.066214.15
37Ar2.78070.11113.993.15000.12964.127.69740.05990.7810.41500.05500.53
36Ar0.18210.00784.290.19780.00723.620.28300.00260.930.37330.00350.93
Moles (40Ar)2.22E−152.25E−152.86E−153.85E−15
%40Ar*20.815.24.56.9
Ca/K2.1972.3013.0332.739
Age (Ka)0.820.550.190.21
± 1 sd0.170.130.040.03
% sd20.3723.2520.6913.41