Fig. 4: δ15N-TOC-δ34Spyr systematics.
From: Sedimentary pyrite sulfur isotopes track the local dynamics of the Peruvian oxygen minimum zone
a δ34Spyr against δ15N. b δ34Spyr against TOC. The three samples located within the modern sulfate−methane transition zone (SMTZ; dotted black outline) are excluded from the linear regressions of δ34Spyr on δ15N. Marker colors and types are as in Fig. 3.
