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Table 5 Radium activities and activity ratios in brine collected from GB2 well (measurement campaign 2016/2017)

From: Water–rock interactions in the Bruchsal geothermal system by U–Th series radionuclides

Sample no. Sampling date 226Ra 228Ra 224Ra 223Ra 228Ra/226Ra 224Ra/228Ra 223Ra/226Ra
GB2-p1z1-001 13.10.2016 28.8 ± 2.4 15.2 ± 0.8 10.6 ± 0.6 0.41 ± 0.25 0.53 ± 0.07 0.70 ± 0.08 0.01 ± 0.01
GB2-p1z1-002 18.10.2016 27.6 ± 2.6 14.9 ± 0.8 10.0 ± 0.4 0.37 ± 0.22 0.54 ± 0.08 0.67 ± 0.06 0.01 ± 0.01
GB2-p1z1-003 24.10.2016 28.1 ± 2.4 15.5 ± 0.8 10.4 ± 0.4 0.48 ± 0.29 0.55 ± 0.08 0.67 ± 0.06 0.02 ± 0.01
GB2-p1z1-004 28.10.2016 29.3 ± 2.8 16.4 ± 0.9 11.5 ± 0.6 0.53 ± 0.32 0.56 ± 0.08 0.70 ± 0.08 0.02 ± 0.01
GB2-p1z1-005 04.11.2016 27.2 ± 2.2 16.1 ± 0.8 9.0 ± 2.0 0.74 ± 0.44 0.59 ± 0.08 0.56 ± .15 0.03 ± 0.02
GB2-p1z1-006 16.11.2016 28.0 ± 2.4 15.3 ± 0.8 10.4 ± 0.6 0.51 ± 0.31 0.55 ± 0.08 0.68 ± 0.07 0.02 ± 0.01
GB2-p1z1-007 17.01.2017 29.5 ± 2.4 15.5 ± 0.8 10.1 ± 0.8 0.61 ± 0.37 0.53 ± 0.07 0.65 ± 0.09 0.02 ± 0.01
GB2-p1z1-008 04.04.2017 30.3 ± 2.2 16.0 ± 0.7 10.3 ± 0.4 0.32 ± 0.19 0.53 ± 0.06 0.64 ± 0.05 0.01 ± 0.01
GB2-p1z1-009 11.04.2017 32.0 ± 2.4 16.7 ± 0.9 9.7 ± 1.0 0.36 ± 0.22 0.52 ± 0.07 0.58 ± 0.09 0.01 ± 0.01
GB2-p1z1-010 27.04.2017 29.9 ± 2.4 16.0 ± 0.8 10.6 ± 0.6 0.44 ± 0.26 0.54 ± 0.07 0.66 ± 0.07 0.02 ± 0.01
GB2-p1z1-011 02.05.2017 27.8 ± 2.4 16.4 ± 0.8 10.7 ± 0.4 0.50 ± 0.30 0.59 ± 0.08 0.65 ± 0.06 0.02 ± 0.01
GB2-p1z1-012 08.05.2017 28.9 ± 2.4 16.2 ± 0.8 11.1 ± 0.4 0.43 ± 0.26 0.56 ± 0.07 0.69 ± 0.06 0.02 ± 0.01
GB2-p1z1-013 15.05.2017 30.0 ± 2.4 16.1 ± 0.8 10.1 ± 0.4 0.45 ± 0.27 0.54 ± 0.07 0.63 ± 0.06 0.02 ± 0.01
  1. Measured values are reported in Bq kg−1. The quoted errors are 2σ-deviations derived from counting statistics