Fig. 2: Sediment characteristics of the upper 12 m of the drill core recovered at Site 1 in Lake Towuti.
From: Organic matter mineralization in modern and ancient ferruginous sediments
Total organic carbon content in bulk sediment and molar Corg/N ratio (left rows), sequentially extracted iron phases (center rows) and iron fractions (right rows) of Lake Towuti sediment of the short (<0.4 m) gravity core (upper panel) and the 12 m TDP drill core (lower panel). See main text and supplementary material for detailed description of the iron phases. Total organic carbon content as well as molar Corg/N ratios of the short gravity core were taken from Vuillemin et al. (2016)14. Note, that Fe(III) within the FeHCl fraction was below our limit of detection so that the reactive Fe(III) pool is composed entirely of the Fedith and Feoxa fraction. Error bars were omitted for clarity, for TOC and C/N ratio they are smaller than the symbols. See Table S5 for iron extraction data, including error margins.
