Hydrogen is found in at multiple levels, sandstone reservoir with dolerite intrusions as seals or baffles

Archean & Proterozoic basement granites with through-going faults to surface

H2 source not proven, most likely candidate is ultramafics within the Archean and Proterozoic basement

Gas flowing from wells is 98% H2

Flow rates ~ 1400 m3 / day for the discovery well

Equivalent of ~20 mmscf/year

Well is only 112m deep

Well produced for 5 years without long-term depletion (apparently), but anecdotally well was shut-in occasionally to build pressure

Subsequent drilling - 20 wells, 18 successful