Fig. 10

Source-Rock potential diagram for samples with TOC > 0.5% showing the ranges of HI values for Type II and III OM when TOC above 4% (i.e. no mineral matrix effect). Brown arrows show the hypothetical effect of mineral matrix on HI values when TOC is lower than 4% and are based on previous works (Espitalié et al. 1985; Behar et al. 2020). Red arrows indicate the effect of maturity on HI values