Gold Hydrogen Ltd (ASX:GHY) has gained important data about the subsurface geology of the Ramsay Project in South Australia with the results of an airborne geophysical survey flown over 10,529 line-kilometres by Xcalibur Multiphysics.
Flown over the mainland Yorke Peninsula component of the flagship natural hydrogen-prospective project, the survey has given GHY a sharper understanding of the main structural boundaries of the project, large-scale faults, estimated depths to basement rocks and the potential composition of said rocks.
The company says these data sets are an essential component for the subsurface model of where hydrogen may be coming from, as well as potential migration routes, and supports the selection of the first well location.
Maiden drill program planning
Gold Hydrogen’s team will now compile the survey interpretation with various other datasets including soil-gas survey results, the reprocessing and interpretation of historical seismic data, sub-surface static and dynamic modelling, and legacy well data.
In the short term, the new information will allow GHY to plan its maiden drilling program, scheduled for October this year, and the delineation of a potential hydrogen discovery.
With a robust geological model in hand, GHY will use this new understanding to identify additional potential hydrogen plays, leads on new discoveries and future drill hole locations.
Natural hydrogen has previously been confirmed on the Ramsay Project on three separate occasions, with samples taken from depths of 240.8 metres, 262.1 metres and 507.8 metres.
An independent assessment of the Ramsay Project’s prospective hydrogen resource produced a Best Estimate Prospective Resource of 1.3 billion kilograms of natural hydrogen, which the company hopes to convert into a contingent gas resource.