FIG 3.

X-ray absorption near edge structure (XANES) spectra of brown and black mineral deposits on Rimicaris kairei. (A) Normalized Fe K-edge μ-XANES spectra of the brown and black shrimp (red and blue solid lines, respectively) and reference material (pyrrhotite, pyrite, magnetite, goethite, and ferrihydrite). The spectra were combined from several analytical points for both brown and black morphs. Results of fitting analysis are shown at the bottom. (B) Normalized S K-edge μ-XANES spectra of the brown and black morphs (red and blue solid lines, respectively) and reference materials (gypsum, sphalerite, native sulfur, pyrite, and pyrrhotite). Analytical points for the XANES spectra are shown in Fig. S4 in the supplemental material.