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Table 3 Summary of sample data from the Abukuma Mountains

From: Direct comparison of site-specific and basin-scale denudation rate estimation by in situ cosmogenic nuclides: an example from the Abukuma Mountains, Japan

Sample Depth (cm) Dissolved quartz (mg) 10Be/ 9Be (10 −14) 1σ error (10 −14) 10Be concentration (10 4atoms/g) 1σ error (10 4atoms/g) 26Al/ 27Al (10 −13) 1σ error (10 −13) 26Al concentration (10 5atoms/g) 1σ error (10 5atoms/g)
ABK101-8 39.0 25,028.70 10.63 0.66 8.43 0.53 2.37 0.14 4.38 0.26
ABK101-10 73.6 25,020.16 6.35 0.48 5.05 0.38 1.73 0.14 3.02 0.24
ABK101-12 108.3 24,973.98 4.59 0.41 3.68 0.33 1.70 0.13 3.57 0.28
ABK101-14 142.9 25,009.59 - - - - 1.32 0.12 2.47 0.23
ABK101-17 194.9 25,012.77 4.81 0.41 3.82 0.33 1.09 0.12 2.15 0.23
ABK101-20 248.5 24,978.36 - - - - 0.99 0.11 1.91 0.21
ABK103-1 37.2 25,007.06 16.63 0.92 13.05 0.72 2.40 0.18 5.57 0.42
ABK103-3 81.7 25,003.43 5.24 0.39 4.17 0.31 1.34 0.12 3.07 0.28
ABK103-5 126.3 24,997.33 - - - - 1.29 0.15 2.53 0.29
ABK103-12 282.4 22,166.50 3.44 0.33 3.08 0.29 0.87 0.14 2.03 0.33
ABK-R1 - 29,839.39 10.42 0.53 6.96 0.36 2.98 0.30 5.29 0.52
ABK-R3 - 24,123.85 5.83 0.26 4.80 0.22 2.01 0.17 3.16 0.26
  1. Background values of 10Be and 26Al are subtracted using the value of each process blank, which is treated in the same batch. 10Be ratios of process blanks for depth profile and river sediment are 2.63 ± 0.20 × 10−14 and 2.13 ± 0.12 × 10−14, respectively. These values are indistinguishable from the value of 10Be/9Be of added commercial 100 ppm Be carrier (Wako Co., Ltd.; 2 × 10−14), and the long-term average value of the process blank (2 × 10−14). 26Al ratios of process blanks for depth profile and river sediment are 5.28 ± 0.74 × 10−15 and 7.12 ± 7.12 × 10−16, respectively. Counting errors (1σ) of standards and process blanks measured with AMS are propagated to the counting uncertainty on the sample ratios. We do not have Be data for ABK101-14, −20, and ABK103-5 because sample treatment was unsuccessful.