Figure 2
From: Sulphur and carbon isotopes as tracers of past sub-seafloor microbial activity
Abundance of pyrite-bound iron relative to different solid-phase iron fractions in sediment of ODP Site 1229. (A) Degree of pyritization with respect to total Fe (orange triangles), extracted Fe (light-blue squares), and extracted Fe without the poorly reactive silicate fraction (black diamonds) plotted vs. depth. (B) Cross-plot of CRS-bound Fe (pyrite) vs. total Fe, extracted Fe + CRS-Fe, and extracted Fe + CRS-Fe without the poorly reactive silicate fraction. (C) Plot of reactive Fe vs. different Fe-fractions to show extraction efficiency. Lines shown in the plots are regression lines.
