Stable Carbon and Hydrogen Isotope Signatures of Chemical Fossils to Infer Palaeoenvironmental Change

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Stable Carbon and Hydrogen Isotope Signatures of Chemical Fossils to Infer Palaeoenvironmental Change. Aims are to selectively measure the stable carbon and hydrogen isotopic composition of individual chemical fossils (biomarkers) in sediments and petroleum. Biomarkers are derived from biochemicals in algae, bacteria and higher plants and their isotopic compositions reflects important information about the climate and environment under which the precursor organisms lived. Periods of palaeoenvironmental change will be established through the varied stable isotope compositions of certain biomarkers within samples sectioned from sediment profiles of different age. This information will then be used to better identify rocks in Australia offering good sources of petroleum.