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Table 4 Age data for the multiple aliquots of alunite using the modified protocol

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

Sample IDPrevious protocol Modified protocol
Ca/KCl/KMol 39Ar (× 10−15)%40Ar*Age (Ma)± 1SDSample IDCa/KCl/KMol 39Ar (× 10−15)%40Ar*Age (Ma)± 1SD
427-013.968− 0.4470.0017.87.203.10619-01− 0.126− 0.0510.02463.514.830.25
427-02− 1.340− 1.6450.00118.611.565.10619-020.022− 0.0570.01378.514.800.29
427-031.742− 0.3660.00129.36.031.90619-030.1010.1990.0188314.070.20
427-040.8270.3310.00427.910.410.69619-04− 0.003− 0.0220.04277.415.100.13
427-05− 0.0620.5270.00227.115.633.54619-050.020− 0.0430.02281.814.660.25
427-06− 0.1260.2830.00233.412.631.63619-06− 0.067− 0.0170.01285.914.640.35
427-07− 0.577− 0.1040.00229.611.701.34619-07− 0.104− 0.1020.01779.915.940.23
427-080.3210.1140.01622.73.210.33619-080.063− 0.2620.0058816.510.97
427-090.7010.0930.0077.91.460.61619-090.0670.0120.01094.815.470.34
427-100.2090.0410.00628.38.601.30619-10− 0.104− 0.0470.02173.714.940.21
427-110.0810.0970.01035.67.070.73619-110.0690.0630.01875.114.820.26
427-120.5910.2700.00620.65.971.08619-12− 0.083− 0.0090.01668.515.210.22
       619-130.011− 0.0040.01965.615.320.19
       619-14− 0.008− 0.0160.05465.214.960.10
       619-15− 0.059− 0.0170.01675.314.580.28
       619-16− 0.117− 0.0040.01880.914.800.24
   Weighted mean (Ma)5.02  Weighted mean (Ma)14.97
   ± 1sd2.0 (43.1%)  ± 1sd0.2 (1.39%)
   MSWD18.00  MSWD3.60