Figure F10. Degree of pyritization of sediments from Demerara Rise in the Fex-total organic carbon (TOC)-S x 2 (following stoichiometry of pyrite-FeS2) system (relative weight ratios). Reactive Fe (Fex) is calculated with Fex = Fe – 0.25 x Al. Data point for pyrite is also shown.

Figure F10. Degree of pyritization of sediments from Demerara Rise in the Fe_x-total organic carbon (TOC)-S x 2 (following stoichiometry of pyrite-FeS₂) system (relative weight ratios). Reactive Fe (Fe_x) is calculated with Fe_x = Fe – 0.25 x Al. Data point for pyrite is also shown.