New approaches to assess thermal evolution in sedimentary basins: towards integration of source rock Raman spectroscopy assisted by machine learning and carbonate thermo-chronometry by Δ47/U-Pb

Temperature is a critical parameter governing the evolution of sedimentary basins. Conventional thermal proxies (e.g. vitrinite reflectance, apatite fission - tracks) may be affected by limitations and call for new complementary methods. Raman spectroscopy on kerogen in the diagenetic realm (T<200°C) has recently provided robust correlation with vitrinite, though further validation is required. Also carbonate thermo-chronology, from clumped isotopes (Δ47) and U-Pb dating (LA - ICP - MS), was implemented, though a pplication to rocks suffering T>100°C remains underexplored. These methods may capture: 1) the thermal maximum recorded by any organic - rich rock; 2) the thermal conditions prevailing when carbonates precipitated. Lower Jurassic source rocks overlying Upper Triassic carbonate - cemented siliciclastic reservoirs from the Paris Basin will be investigated to validate a workflow merging conventional and new methods, to constrain the basin temperature - time evolution and assist thermal modeling. The workflow will reduce uncertainties in the assessment of fossil and renewable energy potential in basins including carbonate and siliciclastic successions.