Investor Presentaiton

10 S- 20 S- OFFICIAL Potential natural hydrogen sources 110°E 120 E 130°E 140°E 30'S- Western Australian Craton Gawler Craton 40 S- 110°E Southern Margin Curnamona Province OWells with hydrogen shows 120°E 130 E Intracratonic basins 150°E 1 Tasman Fold Belt (late Neoprot-Mesozoic) System 140°E 150°E Image - OZSEEBASE 2021 (Geognostics) https://www.geognostics.com/oz-seebase-2021 -10°S -20°S -30°S -40°S Hydrogen indications in drillholes. Ancient basement complexes which contain iron and/or uranium rich rocks e.g. Archaean greenstone and Precambrian basement terranes, 'hot' granites' - may generate hydrogen via: o radiolytic processes (radioactive decay breaks bonds in water) & o oxidation of Fe2+ rich minerals (serpentinization). fractured and seismically active source areas - deep-seated faults can both channel migrating hydrogen up from deep sources to surface and introduce water downward for further chemical reaction with exposed iron-rich rocks. Sedimentary cover may reservoir and trap migrating hydrogen particularly if aquifer systems and/or seal rocks like salt are present (see Bradshaw et al. 2023). Thermogenic decomposition of organic matter (e.g. over-mature source rocks). Surficial hydrogen seeps? Seeps can be blind or coincident with visible sub-circular topographic depressions on the metre to kilometre scale ('fairy circles'). With input from Dr Betina Bendall 2022 https://www.energymining.sa.gov.au/industry/geologica survey/mesa-journal/previous-feature-articles/current-perspectives-on-natural-hydrogen-a-synopsis energymining.sa.gov.au

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