Accumulation and release Fluid flow in the Crust

Mediterranean with He concentrations in excess of 1 x 10 cm He concentrations could not be generated through any steady-state model. 

The concentration of radiogenic noble gases in fluids generated by regional fluid mobilization, and therefore their flux, will in turn be controlled by this history. In this respect, noble gas concentrations in the crust will also depend on the regional tectonic history. In summary  

Storage in the deep crust is efficient for all noble gases irrespective of site  

Release of different noble gases to the transporting media is not rate limited by diffusion  

Diffusion as a major mass transport mechanism is insignificant and 

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