“…A-8b). (1) Theory DRIFTS measurements (Prioul et al, 2018) include weight fractions of 9 inorganic mineral components (smectite, illite, kaolinite, chlorite, quartz-feldspar, muscovite, calcite, dolomite, and anhydrite; however, only major 6 of them are used in analysis by clubbing the four clays together as clay, and quartz, feldspar, muscovite together as qfm, as shown by Table A-1 in Appendix), and organic matter that is only kerogen (because drill cuttings cleaned with solvents remove the soluble organics). The density of the combined inorganic (mineral) and organic phases is estimated using the weight fractions and the known densities of the minerals and the kerogen as follows: 1…”