RE: Lab tests reveal green helium reservoir’s high concentration4 Mar 2024 15:44
"Can I clarify whether "exsolved gas" (the term used by NHE) is the same or different as "coming out of solution" (the wording used by He1)?"
Don't know. Exsolved Helium seems to refer to Helium released from Magnesium,
https://www.nature.com/articles/s41561-023-01182-7
or perhaps some other mineral. The gist appears to be that it is absorbed into the magnesium oxide, replacing the oxygen and then subsequently released due to geological action.
As such it might subsequently migrate elsewhere and become dissolved in water, or brine, and therefore NHE might be referring to the original source but, as is the case with HE1, be collecting it after release from the magnesium oxide in a different location.