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Table 2 Strontium isotope ratios, noble gas temperatures, Ne/He, and air-normalized helium isotope ratios (R/Ra) (data sources: Ufrecht 2018; Ufrecht et al. 2020 and references therein; Traber et al. 2002; Nagra 2001)

From: The Muschelkalk aquifer of the Molasse basin in SW-Germany: implications on the origin and development of highly saline lithium-rich brines in calcareous hydrothermal reservoirs

Well

Water type

Noble gas temp

Ne/He

R/Ra

87Sr/86Sr

  

°C

   

Pfullendorf

Na-Cl

   

0.717372

Neu-Ulm (cr–mo)

Na-Ca-SO4-Cl

5.2*

  

0.714511

Tuttlingen GB1 (mo-mm)

Ca-SO4

2.9

1.396

0.484

0.708221

Benken

Ca-SO4

3.1

0.529

0.297

0.708304

Siblingen

Ca-SO4

4.0

  

–

  1. The analytical uncertainty of the strontium isotope ratio is in the 5th digit after the decimal point. The uncertainty of the air-normalized helium isotope ratio (R/Ra) is in the 4th digit after the decimal point. Please note that for some data no analytical uncertainties have been reported, which are assumed to be in the same order than the reported uncertainties.
  2. cr–mo, well taps crystalline basement (cr) and Upper Muschelkalk (mo); mo-mm, well taps Upper (mo) and Middle Muschelkalk (mm).
  3. *Indication for air contamination during sampling
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