− | Geochemists use a wide variety of organic compounds, derived from both terrestrial (land and aquatic) and marine organisms, to determine depositional environments and thermal maturation. These analyses assay whole kerogen assemblages and include elemental analyses (gas chromatography–mass spectrometry, or GC-MS), Fourier transform infrared spectroscopy (FTIR), biomarkers, spectral fluorescence, and Rock-Eval pyrolysis. | + | Geochemists use a wide variety of organic compounds, derived from both terrestrial (land and aquatic) and marine organisms, to determine depositional environments and thermal maturation. These analyses assay whole kerogen assemblages and include elemental analyses ([[gas chromatography–mass spectrometry]], or GC-MS), [[Fourier transform infrared spectroscopy]] (FTIR), biomarkers, spectral fluorescence, and [[Rock-Eval pyrolysis]]. |