Parameters Determining Helium Concentration in Groundwater

Example The yearly accumulation of radiogenic helium in a typical groundwater can be calculated applying He = 1, U = 3 ppm, and Th=12ppm (as in the average crust), 7= 2.5 g/ cc, and a rockrwater ratio of 4. The helium accumulation for 1 year is 

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The equation of the accumulation of radiogenic helium in ground-water is based on a number of assumptions  

These assumptions are discussed in the following sections. Examples of helium concentrations in groundwaters of the world are given in Table 14.1. 

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