Fig. 2: Content and δ13C profiles of total organic carbon (TOC) and reactive iron-bound organic carbon (FeR-OC) in cores QDN-G1 (a–e) and QDN-14B (f–j).
From: Cycling and persistence of iron-bound organic carbon in subseafloor sediments
a, f Content of FeR. b, g Content of TOC (black lines) and FeR-OC (red lines). Separate x-axes are used for TOC and FeR-OC, labeled in the same color as the data profile. c, h Carbon isotope ratio of TOC (black lines) and FeR-OC (red lines). Separate x-axes are used for TOC and FeR-OC, labeled in the same color as the data profile. d, i The fraction of FeR-OC in TOC (fFeR-OC). e, j The molar ratio of FeR-OC and FeR. The locations of the SMTZ are highlighted by the purple bars. Source data are provided as a Source Data file.
