6f709202-ddd4-42a8-aa09-f30804122543 urn:uuid eng UTF-8 nonGeographicDataset nonGeographicDataset 2025-10-16T09:42:33 creation ISO 19115 2016 Soil Gas Database Table 6f709202-ddd4-42a8-aa09-f30804122543 The soil gas database table contains publicly available results from Geoscience Australia's organic geochemistry (ORGCHEM) schema and supporting oracle databases for gas analyses undertaken by Geoscience Australia's laboratory on soil samples taken from shallow (down to 1 m below the surface) percussion holes. Data includes the percussion hole field site location, sample depth, analytical methods and other relevant metadata, as well as the molecular and isotopic compositions of the soil gas with air included in the reported results. Acquisition of the molecular compounds are by gas chromatography (GC) and the isotopic ratios by gas chromatography-combustion-isotope ratio mass spectrometry (GC-C-IRMS). The concentrations of argon (Ar), carbon dioxide (CO₂), nitrogen (N₂) and oxygen (O₂) are given in mole percent (mol%). The concentrations of carbon monoxide (CO), helium (He), hydrogen (H₂) and methane (C₁, CH₄) are given in parts per million (ppm). Compound concentrations that are below detection limit (BDL) are reported as the value -99999. The stable carbon (13C/12C) and nitrogen (15N/14N) isotopic ratios are presented in parts per mil (‰) and in delta notation as δ13C and δ15N, respectively. Determining the individual sources and migration pathways of the components of natural gases found in the near surface are useful in basin analysis with derived information being used to support exploration for energy resources (petroleum and hydrogen) and helium in Australian provinces. These data are collated from Geoscience Australia records with the results being delivered in the Soil Gas web services on the Geoscience Australia Data Discovery portal at https://portal.ga.gov.au which will be periodically updated. {"type": "Polygon", "coordinates": [[[112.0, -44.0], [154.0, -44.0], [154.0, -9.0], [112.0, -9.0], [112.0, -44.0]]]} 112.0 154.0 -44.0 -9.0 Australia’s Future Energy Resources EFTF – Exploring for the Future Exploration geochemistry Fairy Circles Gas seepage Helium Hydrocarbons Hydrogen Isotope geochemistry Knowledge and information management Laboratory analyses National Hydrogen Natural gas Natural hydrogen ORGCHEM schema Organic geochemistry Published_External Remote Sensing Semi-circular depressions Soil gas Soil sciences not elsewhere classified isotopic composition molecular composition social and multimedia data Link to Geoscience Australia Data Discovery Portal documentDigital Link to Geoscience Australia Data Discovery Portal audio/basic