I believe there's a lot less then the current production rate. The atmospheric loss rate is 50 grams/second, 1,600 tonnes/year, so the radiogenic production sho

I believe there's a lot less then the current production rate. The atmospheric loss rate is 50 grams/second, 1,600 tonnes/year, so the radiogenic production should balance that. The production rate is 169 million m^3 or 29,000 tonnes. (Should be balanced because we're at equilibrium, there's no other significant source, solar wind is comparatively small, and the atmospheric reservoir is large relative to the short-lived human contribution). https://en.wikipedia.org/wiki/Atmospheric_escape#Dominant_atmospheric_escape_and_loss_processes_in_the_Solar_System https://en.wikipedia.org/wiki/Atmospheric_escape#Dominant_at... https://en.wikipedia.org/wiki/Helium#Modern_extraction_and_distribution https://en.wikipedia.org/wiki/Helium#Modern_extraction_and_d...